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  • 1. arXiv:2001.01484 \ce{^{14}N/^{15}N} isotopic ratio in \ce{CH3CN} of Titan's atmosphere measured with ALMA Authors: Takahiro Iino, Hideo Sagawa, Takashi Tsukagoshi Abstract: …67--94. By analyzing archival data obtained by the Atacama Large Millimeter/submillimeter Array (ALMA), we successfully detected submillimeter rotational transitions of \ce{CH3C^{15}N} (J = 19--18) locate at the 338 GHz band in Titan's atmospheric spectra. By comparing those observations with the simultaneously observed \ce{CH3CN} (J = 19--18) lines… ApJ EA
  • 2. arXiv:2001.00601 The Molecular Gas in the NGC 6240 Merging Galaxy System at the Highest Spatial Resolution Authors: E. Treister, H. Messias, G. C. Privon, N. Nagar, A. M. Medling, V. U., F. E. Bauer, C. Cicone, L. Barcos Munoz, A. S. Evans, F. Muller-Sanchez, J. M. Comerford, L. Armus, C. Chang, M. Koss, G. Venturi, K. Schawinski, C. Casey, C. M. Urry, D. B. Sanders, N. Scoville, K. Sheth Abstract: We present the highest resolution --- 15 pc (0.03'') --- ALMA 12CO(2-1) line emission and 1.3mm continuum maps, tracers of the molecular gas and dust, respectively, in the nearby merging galaxy system NGC 6240, that hosts two supermassive black holes growing simultaneously. These observations provide an excellent spatial match to existing Hubble… The Astrophysical Journal CL
  • 3. arXiv:2001.00421 Interpretation of ALMA velocity map for the obscuring torus in NGC1068 Authors: Bannikova E. Yu., Akerman N. A., Sergeyev A. Abstract: Recent ALMA observations have resolved the obscuring torus in the nearest Sy2 galaxy, NGC1068, in the millimeter band. These observations have confirmed the presence of a geometrically thick torus with an orbital motion of its matter and the velocity distribution which can reflect the clumpy structure. In the framework of N-body simulations we consider a dyn… Astronomical and Astrophysical Transactions, vol.31, issue 4, 2020 Other: Ukraine
  • 4. arXiv:2001.00402 An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: Dust attenuation in high-redshift Lyman break Galaxies Authors: M. P. Koprowski, K. E. K. Coppin, J. E. Geach, U. Dudzeviciute, Ian Smail, O. Almaini, Fangxia An, A. W. Blain, S. C. Chapman, Chian-Chou Chen, C. J. Conselice, J. S. Dunlop, D. Farrah, B. Gullberg, W. Hartley, R. J. Ivison, A. Karska, D. Maltby, M. J. Michałowski, A. Pope, S. Salim, D. Scott, C. J. Simpson, J. M. Simpson, A. M. Swinbank , et al. (4 additional authors not shown) Abstract: We analyse 870um Atacama Large Millimetre Array (ALMA) dust continuum detections of 41 canonically-selected z~3 Lyman-break galaxies (LBGs), as well as 209… MNRAS Eu
  • 5. arXiv:2001.02812 ALMA uncovers the [CII] emission and warm dust continuum in a z = 8.31 Lyman break galaxy Authors: Tom J. L. C. Bakx, Yoichi Tamura, Takuya Hashimoto, Akio K. Inoue, Minju M. Lee, Ken Mawatari, Kazuaki Ota, Hideki Umehata, Erik Zackrisson, Bunyo Hatsukade, Kotaro Kohno, Yuichi Matsuda, Hiroshi Matsuo, Takashi Okamoto, Takatoshi Shibuya, Ikkoh Shimizu, Yoshiaki Taniguchi, Naoki Yoshida Abstract: detection of the [Cii] 157.7 um emission from the Lyman break galaxy (LBG) MACS0416 Y1 at z = 8:3113, by using the Atacama Large Millimeter/submillimeter Array (ALMA). The luminosity ratio of [Oiii] 88 um (from previous campaigns) to [Cii] is 9.3  2.6, indicative of hard interstellar radiation fields and/or a low covering fraction of photo-dissociation regions. The emission of [Cii] is cospatial to the 850 um dust emission (90 um rest-frame, from previous campaigns), however the peak [Cii] emission does not agree with the peak [Oiii] emission, suggesting that the lines originate from different conditions in the interstellar medium. We fail to detect continuum emission at 1.5 mm (160 um rest-frame) down to 18 uJy (3). This non-detection places a strong limits on the dust-spectrum, considering the 137 pm 26 uJy continuum emission at 850 um. This suggests an unusually warm dust component (T > 80 K, 90% confidence limit), and/or a steep dust-emissivity index(Bdust > 2), compared to galaxy-wide dust emission found at lower redshifts (typically T < 30 < 50 K, Bdust  1 - 2). If such temperatures are common, this would reduce the required dust mass and relax the dust production problem at the highest redshifts. MNRAS EA
  • 6. arXiv:2001.02666 The evolution of dust-disk sizes from a homogeneous analysis of 1-10 Myr-old stars Authors: Nathanial Hendler, Ilaria Pascucci, Paola Pinilla, Marco Tazzari, John Carpenter, Renu Malhotra, Leonardo Testi Abstract: We utilize ALMA archival data to estimate the dust disk size of 152 protoplanetary disks in Lupus (1-3 Myr), Chamaeleon I (2-3 Myr), and Upper-Sco (5-11 Myr). We combine our sample with 47 disks from Tau/Aur and Oph whose dust disk radii were estimated, as here, through fitting radial profile models to visibility data. We use these 199 homogeneously derived… ApJ accepted Eu
  • 7. arXiv:2001.02242 KASHz: No evidence for ionised outflows instantaneously suppressing star formation in moderate luminosity AGN at z∼1.4-2.6 Authors: J. Scholtz, C. M. Harrison, D. J. Rosario, D. M. Alexander, C-C. Chen, D. Kakkad, V. Mainieri, A. L. Tiley, O. Turner, M. Cirasuolo, R. M. Sharples, S. Stach Abstract: As part of our KMOS AGN Survey at High-redshift (KASHz), we present spatially-resolved VLT/KMOS and VLT/SINFONI spectroscopic data and ALMA 870μm continuum imaging of eight z=1.4--2.6 moderate AGN (L2−10kev = 1042−1045 ergs s−1). We map [OIII], Hα and rest-frame FIR emission to search for any spatial anti-correlation between ionised outflows (traced by the [O iii] line) and star formation (SF; traced by Ha and FIR), that has previously been claimed for some high-z AGN and used as evidence for negative and/or positive AGN feedback. Conclude Ha is unreliable to measure SF. MNRAS, Eu
  • 8. arXiv:2001.02227 ALMA observations of two massive and dense MALT90 clumps Authors: Sudeep Neupane, Guido Garay, Yanett Contreras, Andres Guzmán, Luis Felipe Rodríguez Abstract: We report Atacama Large Millimeter Array observations of 3 mm dust continuum emission and line emission, in HCO+, H13CO+, N2H+ and CH3CN, towards two massive and dense clumps (MDCs) in early but distinct evolutionary phases (prestellar and protostellar), made with the goal of investigating their fragmentation characteristics at angular scales of ∼1 $\arcsec$. We conclude that we are witnessing the evolution of the dense gas in globally collapsing MDCs. ApJ CH
  • 9. arXiv:2001.02185 The Sun at millimeter wavelengths I. Introduction to ALMA Band 3 observations Authors: Sven Wedemeyer, Mikolaj Szydlarski, Shahin Jafarzadeh, Henrik Eklund, Juan Camilo Guevara Gomez, Tim Bastian, Bernhard Fleck, Jaime de la Cruz Rodriguez, Andrew Rodger, Mats Carlsson Abstract: We present an initial study of one of the first ALMA Band 3 observations of the Sun with the aim to characterise the diagnostic potential of brightness temperatures. radiation mapped in ALMA Band 3 might have contributions from a larger range of atmospheric heights than previously assumed but the exact formation height of Band 3 needs to be investigated in more detail. A&A Eu
  • 10.arXiv:2001.01734 The properties of the interstellar medium of galaxies across time as traced by the neutral atomic carbon [CI] Authors: Francesco Valentino, Georgios E. Magdis, Emanuele Daddi, Daizhong Liu, Manuel Aravena, Frederic Bournaud, Isabella Cortzen, Yu Gao, Shuowen Jin, Stephanie Juneau, Jeyhan S. Kartaltepe, Vasily Kokorev, Min-Young Lee, Suzanne C. Madden, Desika Narayanan, Gergo Popping, Annagrazia Puglisi Abstract: We report ALMA observations of the neutral atomic carbon transitions [CI] and multiple CO lines in a sample of ∼30 main sequence galaxies at z∼1, including novel information on [CI](2-1) and CO(7-6) for 7 of such normal objects. We complement our observations with a collection of >200 galaxies with coverage of similar transitions, spanning the z = 0 􀀀 4 redshift interval and a variety of ambient conditions from local to high-redshift starbursts. Astrophysical Journal ApJ Eu
  • 11. arXiv:2001.06400 The ALMA-PILS survey: Inventory of complex organic molecules towards IRAS 16293-2422 A Authors: S. Manigand, J. K. Jørgensen, H. Calcutt, H. S. P. Müller, N. F. W. Ligterink, A. Coutens, M. N. Drozdovskaya, E. F. van Dishoeck, S. F. Wampfler Abstract: …of complex organic molecules through comparisons of their abundances towards the Class 0 protostellar binary IRAS 16293-2422 (IRAS16293). We utilised observations from the ALMA Protostellar Interferometric Line Survey of IRAS16293. The species identification and the rotational temperature and column density estimation were derived by fitting the extracted sp… A&A. Eu
  • 12. arXiv:2001.06015 On the Absence of High-Redshift AGNs: Little Growth in the Supermassive Black Hole Population at High Redshifts Authors: L. L. Cowie, A. J. Barger, F. E. Bauer, J. Gonzalez-Lopez Abstract: …We then probe more deeply in the X-ray data by using pre-selected samples with high spatial resolution NIR/MIR (HST 1.6 micron and Spitzer 4.5 micron) and submillimeter (ALMA 850 micron) observations. The combination of the NIR/MIR and submillimeter pre-selections allows us to find X-ray sources with a wide range of dust properties and spectral energy distr… ▽ More[ ApJ NA
  • 13.arXiv:2001.06011 [A Submillimeter Perspective on the GOODS Fields (SUPER GOODS). IV. The Submillimeter Properties of X-ray Sources in the CDF-S Authors: A. J. Barger, L. L. Cowie, F. E. Bauer, J. Gonzalez-Lopez] Abstract: …and photometric redshift catalog for the full 7 Ms sample, but much of our analysis focuses on the central (off-axis angles <5.7') region, which contains a large, faint ALMA sample of 75 >4.5-sigma 850 micron sources. We measure the 850 micron fluxes at the X-ray positions using the… ▽ More ApJ NA
  • 14. arXiv:2001.05604 ALMA band 8 observations of DLA2233+131 at z=3.150 Authors: Kazuyuki Ogura, Hideki Umehata, Yoshiaki Taniguchi, Yuichi Matsuda, Nobunari Kashikawa, Kartik Sheth, Katsuhiro Murata, Masaru Kajisawa, Masakazu A. R. Kobayashi, Takashi Murayama, Tohru Nagao Abstract: We present our ALMA Band 8 observations of a damped Lyα absorption (DLA) system at z=3.150 observed in the spectrum of the quasar Q2233+131 at z=3.295. The optical counterpart of this DLA has been identified and it shows a double-peaked Lyα emission line. Since one possible origin of DLAs at high redshift is an outflowing gas from star-forming galaxi… ▽ More PASJ EA
  • 15. arXiv:2001.05507 A SCUBA-2 850μm Survey of Heavily Reddened Quasars at z~2 Authors: Clare F. Wethers, Manda Banerji, Paul C. Hewett, Gareth C. Jones] Abstract: …surveys. There are, however, individual quasars where we find evidence for an excess of associated sub-mm galaxies. For two quasars, higher spatial resolution and spectroscopic ALMA observations confirm the presence of an excess of sub-mm sources. We compare the 850μm detection rate of our quasars to both unobscured, ultraviolet luminous quasars as well as… ▽ More MNRAS Eu
  • 16. arXiv:2001.05007 Observations of Protoplanetary Disk Structures Authors: Sean M. Andrews Abstract: …evolutionary behaviors. Over the past decade, rapid developments in these areas have largely been driven by observations with the Atacama Large Millimeter/submillimeter Array (ALMA). This review highlights the state of observational research on disk structures, emphasizing three key conclusions that reflect the main branches of the field: (1) Relationships a… ▽ More\ Annual Reviews of Astronomy and Astrophysics; \NA
  • 17. arXiv:2001.05004\The Observational Anatomy of Externally Photoevaporating Planet-Forming Discs I: Atomic Carbon\ Authors: Thomas J. Haworth, James E. Owen Abstract: …also exhibit a twisted morphology over large scales (unlike other processes that result in twists, which are typically towards the inner disc). CI is readily observable with ALMA, which means that it is now possible to identify and characterise the effect of external photoevaporation on planet-forming discs in intermediate UV environments. ▽ More MNRAS Eu
  • 18. arXiv:2001.05003 The ALMaQUEST Survey: II. What drives central starbursts at z~0? Authors: Sara L. Ellison, Mallory D. Thorp, Hsi-An Pan, Lihwai Lin, Jillian M. Scudder, Asa F. L. Bluck, Sebastian F. Sanchez, Mark Sargent Abstract: …local universe are driven by SFRs that are preferentially boosted in their central regions. Here, we present molecular gas maps obtained with the Atacama Large Millimeter Array (ALMA) observatory for 12 central starburst galaxies at z~0 drawn from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. The… ▽ More MNRAS NA
  • 19. arXiv:2001.04997 Detection of Irregular, Sub-mm Opaque Structures in the Orion Molecular Clouds: Protostars within 10000 years of formation? Authors: Nicole Karnath, S. T. Megeath, John Tobin, Amelia Stutz,* Zhi-Yun Li*, Patrick Sheehan, Nick Reynolds, Sarah Sadavoy, Ian Stephens, Mayra Osorio, Guillem Anglada, Ana Diaz-Rodriguez, Eric Cox Abstract: We report ALMA and VLA continuum observations that potentially identify the four youngest protostars in the Orion Molecular Clouds taken as part of the Orion VANDAM program. These are distinguished by bright, extended, irregular emission at 0.87 mm and 8 mm and are optically thick at 0.87 mm. These structures are distinct from the disk or point-like morpholo… ▽ More ApJ, NA
  • 20. arXiv:2001.04638 A non-corotating gas component in an extreme starburst at z=4.3 uthors: Ken-ichi Tadaki, Daisuke Iono, Min S. Yun, Itziar Aretxaga, Bunyo Hatsukade, Minju M. Lee, Tomonari Michiyama, Kouichiro Nakanishi, Toshiki Saito, Junko Ueda, Hideki Umehata Abstract: We report the detection of a non-corotating gas component in a bright unlensed submillimeter galaxy at z=4.3, COSMOS-AzTEC-1, hosting a compact starburst. ALMA 0.17 and 0.09 arcsec resolution observations of [CII] emission clearly demonstrate that the gas kinematics is characterized by an ordered rotation. After subtracting the best-fit model of a rotating d… ▽ More ApJ. EA
  • 21. arXiv:2001.04468 The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. A Statistical Characterization of Class 0 and I Protostellar Disks Authors: John J. Tobin, Patrick Sheehan, S. Thomas Megeath, Ana Karla Diaz-Rodriguez, Stella S. R. Offner, Nadia M. Murillo, Merel van 't Hoff, Ewine F. van Dishoeck, Mayra Osorio, Guillem Anglada, Elise Furlan, Amelia M. Stutz, Nickalas Reynolds, Nicole Karnath, William J. Fischer, Magnus Persson, Leslie W. Looney, Zhi-Yun Li, Ian Stephens, Claire J. Chandler, Erin Cox, Michael M. Dunham, Lukasz Tychoniec, Mihkel Kama, Kaitlin Kratter , et al. (11 additional authors not shown) Abstract: We have conducted a survey of 328 protostars in the Orion molecular clouds with ALMA at 0.87 mm at a resolution of ∼0.1" (40 au), including observations with the VLA at 9 mm toward 148 protostars at a resolution of ∼0.08" (32 au). This is the largest multi-wavelength survey of protostars at this resolution by an order of magnitude. We use t… ▽ More ApJ. NA
  • 22. arXiv:2001.08400 Polarized emission by aligned grains in the Mie regime : application to protoplanetary disks observed by ALMA Authors: V. Guillet, J. M. Girart, A. J. Maury, F. O. Alves Abstract: ...When using realistic grain size distributions for disks with grains up to the submillimeter sizes, the polarization direction of thermal emission by aligned grains is shown to be parallel to the direction of the magnetic field over a significant fraction of the wavelengths typically used to observe young protoplanetary disks. This property may explain the peculiar azimuthal orientation of the polarization vectors in some of the disks observed with ALMA and attest of the conserved ability of dust polarized emission to trace the magnetic field in disks. Submitted 23 January, 2020; originally announced January 2020. Eu
  • 23. arXiv:2001.08147 GG Tau A: gas properties and dynamics from the cavity to the outer disk Authors: N. T. Phuong, A. Dutrey, P. N. Diep, S. Guilloteau, E. Chapillon, E. Di Folco, Y-W. Tang, V. Pietu, J. Bary, T. Beck, F. Hersant, D. T Hoai, J. M. Hure, P. T. Nhung, A. Pierens, P. Tuan-Anh Abstract: We used new ALMA 13CO and C18O(3-2) observations obtained at high angular resolution (∼0.2") together with previous CO(3-2) and (6-5) ALMA data and continuum maps at 1.3 and 0.8 mm in order to determine the gas properties (temperature, density, and kinematics) in the cavity. The outer disk is cold, with a temperature $<20$ K beyond 250 au that drops quickly (r$^{-1}$). The kinematics of the gas inside the cavity reveals infall motions at about 10% of the Keplerian speed. We derive the amount of gas in the cavity, and find that the brightest clumps, which contain about 10% of this mass, have kinetic temperatures 40$-$80 K, CO column densities of a few 10$^{17}$ cm$^{-2}$, and H$_2$ densities around 10$^7$ cm$^{-3}$. Although the gas in the cavity is only a small fraction of the disk mass, the mass accretion rate throughout the cavity is comparable to or higher than the stellar accretion rate. It is accordingly sufficient to sustain the circumstellar disks on a long timescale. Submitted 22 January, 2020; originally announced January 2020. Eu
  • 24. arXiv:2001.07720 Nine localised deviations from Keplerian rotation in the DSHARP circumstellar disks: Kinematic evidence for protoplanets carving the gaps Authors: C. Pinte, D. J. Price, F. Menard, G. Duchene, V. Christiaens, S. M. Andrews, J. Huang, T. Hill, G. van der Plas, L. M. Perez, A. Isella, Y. Boehler, W. R. F. Dent, D. Mentiplay, R. A. Loomis Abstract: …planets lie within a gap and/or at the end of a spiral detected in dust continuum emission. This suggests that a significant fraction of the dust gaps and spirals observed by ALMA in disks are caused by embedded protoplanets. ApJ letters OTHER (Australia)
  • 25. arXiv:2001.06997 The redshift and star formation mode of AzTEC2: a pair of massive galaxies at z=4.63 Authors: E. F. Jiménez-Andrade, J. A. Zavala, B. Magnelli, C. M. Casey, D. Liu, E. Romano-Díaz, E. Schinnerer, K. Harrington, I. Aretxaga, A. Karim, J. Staguhn, A. D. Burnham, A. Montaña, V. Smolčić, M. Yun, F. Bertoldi, D. Hughes Abstract: We combine observations from the Atacama Large Millimeter/submillimeter Array (ALMA) and the NOrthern Extended Millimeter Array (NOEMA) to assess the redshift and to study the star formation conditions in AzTEC2: one of the brightest sub-millimeter galaxies (SMGs) in the COSMOS field (S1.1mm=10.5±1.4mJy). Our high-resolution observations confirm t… ApJ NA
  • 26. arXiv:2001.06986 Meso-scale Instability Triggered by Dust Feedback in Dusty Rings: Origin and Observational Implications Authors: Pinghui Huang, Hui Li, Andrea Isella, Ryan Miranda, Shengtai Li, Jianghui Ji Abstract: High spatial resolution observations of protoplanetary disks (PPDs) by ALMA have revealed many details that are providing interesting constraints on the disk physics as well as dust dynamics, both of which are essential for understanding planet formation. We carry out high-resolution, 2D global hydrodynamic simulations, including the effects of dust feedback… ▽ More ApJ OTHER (China)
  • 27. arXiv:2001.06969 Effect of feedback of massive stars in the fragmentation, distribution, and kinematics of the gas in two star forming regions in the Carina Nebula Authors: David Rebolledo, Andrés E. Guzmán, Yanett Contreras, Guido Garay, S. -N. X. Medina, Patricio Sanhueza, Anne J. Green, Camila Castro, Viviana Guzmán, Michael G. Burton Abstract: We present ALMA high spatial resolution observations towards two star forming regions located in one of the most extreme zones of star formation in the Galaxy, the Carina Nebula. One region is located at the center of the nebula and is severally affected by the stellar feedback from high-mass stars, while the other region is located further south and is less… ▽ More Astrophysical Journal NA
  • 28. arXiv:2001.06589 First detection of the 448 GHz ortho-H2O line at high redshift: probing the structure of a starburst nucleus at z = 3.63 Authors: C. Yang, E. González-Alfonso, A. Omont, M. Pereira-Santaella, J. Fischer, A. Beelen, R. Gavazzi Abstract: …nuclei since the line requires high far-IR optical depths to be excited. In this letter, we report the first high-redshift detection of the 448 GHz H2O(423-330) line using ALMA, in a strongly lensed submillimeter galaxy (SMG) at z=3.63. After correcting for magnification, the luminosity of the 448 GHz H2O line is ~10^6 L_sun. In combination with three other… A&A Letter accepted Eu (Chile)
  • 29. arXiv:2001.11239 Deeply cooled core of the Phoenix galaxy cluster imaged by ALMA with the Sunyaev-Zel'dovich effect Authors: T. Kitayama, S. Ueda, T. Akahori, E. Komatsu, R. Kawabe, K. Kohno, S. Takakuwa, T. Tsutsumi, M. Takizawa, K. Yoshikawa Abstract: ALMA imaged the thermal Sunyaev-Zel'dovich effect (SZE) toward SPT-CL J2334-4243 (the Phoenix galaxy cluster) at z=0.597 in Band 3. The SZE is imaged at 5" resolution (corresponding to the physical scale of 23kpc/h) within 200kpc/h from the central galaxy Unlike typical clusters at any redshift, gas temperature drops by at least a factor of 5 toward the center. We identify 6×1011M⊙ cool gas with temperature 3 keV in the inner 20 h−1 kpc. Taken together, our results imply that the gas is indeed cooling efficiently and nearly isobarically down to this radius in the Phoenix cluster with the peak signal-to-noise ratio exceeding… PASJ EA
  • 30. arXiv:2001.11045 Mdust−M⋆ Relation Hints at the Origin of Particle Traps in Protoplanetary Disks Authors: Paola Pinilla, Ilaria Pascucci, Sebastian Marino Abstract: [abridged] Demographic surveys of protoplanetary disks, mainly with ALMA, have provided access to a large range of disk dust masses (Mdust) around stars with different stellar types and for different star-forming regions. These surveys found a linear relation in logarithmic scale between Mdust and M⋆ that steepens with time, Models of dust evolution can reproduced the observed Mdust 􀀀 M? relation in different star-forming regions when strong pressure bumps are included and when the disk mass scales with stellar mass (case of Mdisk = 0:05Msun in our models). This result arises from dust trapping and dust growth beyond centimeter-size grains inside pressure bumps. However, the flatter relation of Mdust Msun for TDs and disks with substructures cannot be reproduced by the models, unless the formation of boulders is inhibited inside pressure bumps. Conclusions. In the context of planets originating pressure bumps, our results agree with the current exoplanet statistics about giant planet occurrence increasing with stellar mass, but we cannot conclude about the type of planets needed in the case of low mass stars. This is because for M? < 1M , the observed Mdust obtained from models is very low due to the efficient growth of dust particles beyond centimeter sizes inside pressure bumps. A&A Eu
  • 31. arXiv:2001.11043 Systematic Variations of CO J=2-1/1-0 Ratio in The Barred Spiral Galaxy M83 Authors: J. Koda, T. Sawada, K. Sakamoto, A. Hirota, F. Egusa, S. Boissier, D. Calzetti, J. Donovan Meyer, B. G. Elmegreen, A. Gil de Paz, N. Harada, L. C. Ho, M. I. N. Kobayashi, N. Kuno, S. Martin, K. Muraoka, K. Nakanishi, N. Scoville, M. Seibert, C. Vlahakis, Y. Watanabe Abstract: We present spatial variations of the CO J=2-1/1-0 line ratio in M83 using Total Power array data from ALMA. While the intensities of these two lines correlate tightly, the ratio varies over the disk, with a disk average ratio of 0.69, and shows the galactic center and a two-arm spiral pattern. It is high (>0.7) in regions of high molecular gas surface density Smol but ranges from low to high ratios in regions of low Smol. We speculate that the large spread of R21=10 in low mol regions, mostly at the downstream sides of spiral arms, may be due to the evolution of massive stars after spiral arm passage. Having in a late phase escaped from the spiral arms and their parental clouds, they may contribute to the dust heating by FUV and gas heating by cosmic rays produced by supernovae. ApJ Letters NA
  • 32. arXiv:2001.11040 A multi-frequency ALMA characterization of substructures in the GM Aur protoplanetary disk Authors: Jane Huang, Sean M. Andrews, Cornelis P. Dullemond, Karin I. Oberg, Chunhua Qi, Zhaohuan Zhu, Tilman Birnstiel, John M. Carpenter, Andrea Isella, Enrique Macias, Melissa K. McClure, Laura M. Perez, Richard Teague, David J. Wilner, Shangjia Zhang Abstract: …midst of being cleared out by a forming planet. As a result, GM Aur has had an outsized influence on our understanding of disk structure and evolution. We present 1.1 and 2.1 mm ALMA continuum observations of the GM Aur disk at a resolution of ~50 mas (~8 au), as well as HCO+ J=3−2 observations at a resolution of ~100 mas. The dust continuum shows at le… ▽ More ApJ. NA
  • 33. arXiv:2001.10645 The Formation Height of Millimetre-wavelength Emission in the Solar Chromosphere Authors: Juan Martinez-Sykora, Bart De Pontieu, Jaime de la Cruz Rodriguez, Georgios Chintzoglou] Abstract: In the past few years, the ALMA radio telescope has become available for solar observations. Non-equilibrium ionization increases the opacity in the chromosphere so that ALMA mostly observe spicules and fibrils along the canopy fields. ApJL NA
  • 35. arXiv:2001.10546 Properties of M Dwarf Flares at Millimeter Wavelengths Authors: Meredith A. MacGregor, Rachel A. Osten, A. Meredith Hughes Abstract: We report on two millimeter flares detected by ALMA at 220 GHz from AU Mic, a nearby M dwarf. The larger flare had a duration of only ∼35 sec, with peak LR=2×1015 erg s−1 Hz−1, and lower limit on linear polarization of |Q/I|>0.12±0.04. We examine the characteristics common to these new AU Mic events and those from Proxima Cen emission must be occurring in a low density environment of only modest magnetic field strength. A deeper understanding of this newly discovered and apparently common stellar are mechanism awaits more observations with better-studied flare components at other wavelengths. ApJ NA
  • 36. arXiv:2001.09776 ALMA reveals a large structured disk and nested rotating outflows in DG Tau B Authors: A. de Valon, C. Dougados, S. Cabrit, F. Louvet, L. A. Zapata, D. Mardones Abstract: We present Atacama Large Millimeter Array (ALMA) Band 6 observations at 14-20 au spatial resolution of the disk and CO(2-1) outflow around the Class I protostar DG Tau B in Taurus. The disk is very large, both in dust continuum (Reff,95%=174 au) and CO (RCO=700 au). It shows Keplerian rotation around a 1.1±0.2 M⊙ central star Our ALMA observations therefore demonstrate that the inner cone walls, and the associated scattered light cavity, do not trace the interface with infalling material, which is shown to be confined to much wider angles (> 70). The properties of the conical walls are suggestive of the interaction between an episodic inner jet or wind with an outer disk wind, or of a massive disk wind originating from 2-5 au. EU

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  • C. arXiv:2001.03795 Splash Bridge Models of Inclined, Gas-Rich, Direct Galaxy Collisions Authors: Travis Yeager, Curt Struck Abstract: …The number distribution of high velocity shocks in cloud collisions, produced in our low inclination models, are in agreement with those observed in the Taffy Galaxies with ALMA, Appleton et al., 2019. ▽ More NA
  • D. arXiv:2001.06376 The paradox of youth for ALMA planet candidates Authors: Sergei Nayakshin Abstract: Recent ALMA observations indicate that the majority of bright protoplanetary discs show signatures of young moderately massive planets. I show that this result is paradoxical. The planets should evolve away from their observed states by radial migration and gas accretion in about 1\% of the system age. These systems should then hatch tens of giant planets in… ▽ More MNRAS Eu
  • E. arXiv:2001.11076 The ALMA Development Program: Roadmap to 2030 Authors: John Carpenter, Daisuke Iono, Francisca Kemper, Al Wootten Abstract: The Atacama Large Millimeter/submillimeter Array (ALMA) is the premier telescope for sensitive, high-resolution observations at millimeter and submillimeter wavelengths. The array consists of fifty 12-m diameter antennas that can be reconfigured to baselines as long as 16 km, twelve 7-m antennas that sample the short visibility spacings, and four 12-m antenn… ▽ More Monthly Newsletter of International URSI Commission J Radio Astronomy January 2020
  • F. arXiv:2001.10588 Formation of Planetary Populations II: Effects of Initial Disk Size & Radial Dust Drift Authors: Matthew Alessi, Ralph E. Pudritz, Alex J. Cridland Abstract: Recent ALMA observations indicate that while a range of disk sizes exist, typical disk radii are small, and that radial dust drift affects the distribution of solids in disks. Here we explore the consequences of these features in planet population synthesis models. A key feature of our model is planet traps - barriers to otherwise rapid type-I migration of f… ▽ More MNRAS; revised NA
  • G. arXiv:2001.10547 Outflows and extended [CII] halos in high redshift galaxies Authors: Elia Pizzati, Andrea Ferrara, Andrea Pallottini, Simona Gallerani, Livia Vallini, Davide Decataldo, Seiji Fujimoto Abstract: Recent stacked ALMA observations have revealed that normal, star-forming galaxies at z≈6 are surrounded by extended (≈10kpc) [CII] emitting halos which are not predicted by the most advanced, zoom-in simulations. We present a model in which these halos are the result of supernova-driven cooling outflows. Our model contains two fr… ▽ More MNRAS Eu
  • H. arXiv:2001.10527 A New Lecture-Tutorial for Teaching Interferometry to Astro 101 Students Authors: Colin S. Wallace, Chase Hatcher, Timothy G. Chambers, Seth D. Hornstein, Julia Kamenetzky, Edward E. Prather Abstract: …detail. Many recent astrophysical discoveries that have revolutionized the scientific community's understanding of the cosmos were made by interferometers such as LIGO, ALMA, and the Event Horizon Telescope. Astro 101 instructors who want their students to learn the science behind these discoveries must teach about interferometry. Decades of research sho… ▽ Moresubmitted to The Physics Teacher NA

-- AlWootten - 2020-01-08
Topic revision: r5 - 2020-02-03, AlWootten
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