• Mar 30: This week: week:3 Eu:0 NA:2 EA:3 CHile: Other:
  • Apr 6: This week:4 Eu:1 NA: 2.5 EA: CHile: Other: 0.5 (China) Mar month: 29 Eu:11 NA:8.5 EA:7 CHile:1 Other: 2.5

  • 1. arXiv:2003.08827 Outflow from Outer-arm Starburst in a Grazing Collision between Galaxies Authors: Michele Kaufman, Bruce G. Elmegreen, Morten Andersen, Debra Meloy Elmegreen, Curtis Struck, Frederic Bournaud, Elias Brinks, James C. McGarry Abstract: New ALMA CO, HCO+, and 100 GHz continuum observations and Gemini NIFS K-band spectra are combined with previous radio to X-ray data to study Feature i, a highly luminous starburst clump on an outer arm of the interacting galaxy NGC 2207. This clump has an optically-opaque dust cone extending out of its 170 pc core. The measured CO accounts for the dark cone… AJ, NA
  • 2. arXiv:2003.08658 ALMA 0.88 mm Survey of Disks around Planetary-mass Companions Authors: Ya-Lin Wu, Brendan P. Bowler, Patrick D. Sheehan, Sean M. Andrews, Gregory J. Herczeg, Adam L. Kraus, Luca Ricci, David J. Wilner, Zhaohuan Zhu Abstract: Characterizing the physical properties and compositions of circumplanetary disks can provide important insights into the formation of giant planets and satellites. We report ALMA 0.88 mm (Band 7) continuum observations of six planetary-mass (10-20 MJup) companions: CT Cha b, 1RXS 1609 b, ROXs 12 b, ROXs 42B b, DH Tau b, and FU Tau b. No continuum so… AJ NA
  • 3. arXiv:2003.08631 Dust and gas content of high-redshift galaxies hosting obscured AGN in the CDF-S Authors: Q. D'Amato, R. Gilli, C. Vignali, M. Massardi, F. Pozzi, G. Zamorani, C. Circosta, F. Vito, J. Fritz, G. Cresci, V. Casasola, F. Calura, A. Feltre, V. Manieri, D. Rigopoulou, P. Tozzi, C. Norman Abstract: We exploit ALMA Cycle 4 observations of the continuum (~2.1mm) and high-J CO emission of a sample of six X-ray selected SMGs hosting an obscured AGN at z_spec>2.5 in the 7 Ms CDF-S. We conclude that the ISM of high redshift galaxies can substantially contribute to nuclear obscuration up to the Compton-thick (> 1024 cm􀀀2) regime. In addition, we found that all the detected sources show a velocity gradient reminding one rotating system, even though two of them show peculiar features in their morphology that can be associated with a chaotic, possiblybmerging, structure.…and dust reservoirs that are thought to sustain and possibly obscure vigorous star formation processes that make these objects shine at far-IR and sub-mm wavelengths. A&A Eu
  • 4. arXiv:2003.08601 Time Variations in the Flux Density of Sgr A* at 230 GHz Detected with ALMA Authors: Yuhei Iwata, Tomoharu Oka, Masato Tsuboi, Makoto Miyoshi, Shunya Takekawa A bstract: …therefore key to developing our understanding of them. Time variations in the 230 GHz band flux of Sgr A* have been found with the Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 5 observations. Measuring the flux density of Sgr A* in 1 min snapshots at 217.5, 219.5, and 234.0 GHz, we obtained light curves for ten 70 min periods. The light curves s… ApJL EA
  • 5. arXiv:2003.08189 Spirals inside the millimeter cavity of transition disk SR 21 Authors: G. A. Muro-Arena, C. Ginski, C. Dominik, M. Benisty, P. Pinilla, A. J. Bohn, T. Moldenhauer, W. Kley, D. Harsono, T. Henning, R. G. van Holstein, M. Janson, M. Keppler, F. Ménard, L. M. Pérez, T. Stolker, M. Tazzari, M. Villenave, A. Zurlo, C. Petit, F. Rigal, O. Möller-Nilsson, M. Llored, T. Moulin, P. Rabou Abstract: We imaged the transition disk SR 21 in H-band in scattered light with SPHERE/IRDIS and in thermal dust emission with ALMA band 3 (3mm) observations at a spatial resolution of 0.1". We combine these datasets with existing band 9 (430um) and band 7 (870um). SR 21’s main features in both scattered light and thermal emission are consistent with hydrodynamical predictions of planet-disk interactions. With the location of a possible planet being well-constrained by observations, it is an ideal candidate for follow-up observations to search for direct evidence of a planetary companion still embedded in its disk.A&A Eu
  • 6. arXiv:2003.07863 Giant star-forming clumps? Authors: R. J. Ivison, J. Richard, A. D. Biggs, M. A. Zwaan, E. Falgarone, V. Arumugam, P. P. van der Werf, W. Rujopakarn Abstract: With the spatial resolution of the ALMA, dusty galaxies in the distant Universe typically appear as single, compact blobs of dust emission, with a median half-light radius, ≈ 1 kpc. Occasionally, strong gravitational lensing by foreground galaxies or galaxy clusters has probed spatial scales 1-2 orders of magnitude smaller. Here, we present data from ALMA which reveal that the dust continuum of the z=2.3 Cosmic Eyelash is in fact smooth and can be reproduced using two Sérsic profiles with effective radii, 1.2 and 4.4 kpc, with no evidence of significant star-forming clumps down to a spatial scale of ≈ 80 pc and a star-formation rate of < 3M⊙ yr−1. MNRAS Eu
  • 7. arXiv:2003.07472 ALMA high frequency long baseline campaign in 2017: band-to-band phase referencing in submillimeter waves Authors: Yoshiharu Asaki, Luke T. Maud, Edward B. Fomalont, Neil M. Phillips, Akihiko Hirota, Tsuyoshi Sawada, Loreto Barcos-Muñoz, Anita M. S. Richards, William R. F. Dent, Satoko Takahashi, Stuartt Corder, John M. Carpenter, Eric Villard, Elizabeth M. Humphreys Abstract: In 2017, an Atacama Large Millimeter/submillimeter Array (ALMA) high-frequency long baseline campaign was organized to test image capabilities with baselines up to 16 km at submillimeter (submm) wavelengths. We investigated image qualities using ALMA receiver Bands 7, 8,* 9, and 10* (285-875 GHz) by adopting band-to-band…B2B phase referencing was successfully applied, allowing us to achieve an angular resolution of 14  11 and 10  8 mas for HL Tau and VY CMa, respectively.2020ApJS..247...23A EA/JAO
  • 8. arXiv:2003.07423 Exploring molecular complexity with ALMA (EMoCA): Complex isocyanides in Sgr B2(N) Authors: E. R. Willis, R. T. Garrod, A. Belloche, H. S. P. Müller, C. J. Barger, M. Bonfand, K. M. Menten Updated chemical models do a very good job of reproducing the observed abundances ratio of CH3NC:CH3CN towards Sgr B2(N2), while being consistent with upper limits for other isocyanide/cyanide pairs. HCCNC:HC3N is poorly reproduced, however. Our results highlight the need for models with AV-depdendent ζ. However, there is still much to be understood about the chemistry of these species, as evidenced by the systematic overproduction of HCCNC. Further study is also needed to understand the complex effect of varying ζ on the chemistry of these species. The new single-stage chemical model should be a powerful tool in analyzing hot-core sources in the future. Astronomy & Astrophysics NA
  • 9. arXiv:2003.07067 Disk structure around the Class I protostar L1489 IRS revealed by ALMA: a warped disk system Authors: Jinshi Sai, Nagayoshi Ohashi, Kazuya Saigo, Tomoaki Matsumoto, Yusuke Aso, Shigehisa Takakuwa, Yuri Aikawa, Ippei Kurose, Hsi-Wei Yen, Kohji Tomisaka, Kengo Tomida, Masahiro N. Machida Abstract: We have observed the Class I protostar L1489 IRS with the Atacama Millimeter/submillimeter Array (ALMA) in Band 6. The C18O J=2-1 line emission shows flattened and non-axisymmetric structures in the same direction as its velocity gradient due to rotation. a warped disk system can form by mass accretion from a misaligned envelope. We also discuss a possible disk evolution scenario based on comparisons of disk radii and masses between Class I and Class II sources. ApJ EA
  • 10. arXiv:2003.06443 Star formation law in the EoR from [CII] and CIII] lines Authors: L. Vallini, A. Ferrara, A. Pallottini, S. Carniani, S. Gallerani Abstract: …. Our method will be optimally applied to joint ALMA and JWST targets. MNRAS Letters Eu
  • 11. arXiv:2003.05659 Investigating the connection between gamma-ray activity and relativistic jet in 3C273 during 2015-2019 Authors: Dae-Won Kim, Sascha Trippe, Evgeniya V. Kravchenko Abstract: …to the parsec-scale jet. We generate Fermi-LAT gamma-ray light curves with multiple binning intervals and study the spectral properties of the gamma-ray emission. Using a 3-mm ALMA light curve, we study the correlation between radio and gamma-ray emission. Relevant activity in the parsec-scale jet of 3C273 is investigated with 7-mm VLBA observations obtained… ▽ More A&A (submitted: 2020 January 10; accepted: 2020 March 5) EA
  • 12. arXiv:2003.05484 An ALMA survey of the brightest sub-millimetre sources in the SCUBA-2 COSMOS field Authors: J. M. Simpson, Ian Smail, U. Dudzeviciute, Y. Matsuda, B. -C. Hsieh, W. -H. Wang, A. M. Swinbank, S. M. Stach, Fang Xia An, J. E. Birkin, Y. Ao, A. J. Bunker, S. C. Chapman, Chian-Chou Chen, K. E. K. Coppin, S. Ikarashi, R. J. Ivison, I. Mitsuhashi, T. Saito, H. Umehata, R. Wang, Y. Zhao Abstract: We present an ALMA study of the ~180 brightest sources in the SCUBA-2 map of the COSMOS field from the S2COSMOS survey, as a pilot study for AS2COSMOS - a full survey of the ~1,000 sources in this field. In this pilot we have obtained 870-um continuum maps of an essentially complete sample of the brightest 182 sub-millimetre sources (S_850um=6.2mJy) in COSMO… ▽ More MNRAS Eu
  • 13. arXiv:2003.04502 Transition from ordered pinched to warped magnetic field on a 100 au scale in the Class 0 protostar B335 Authors: Hsi-Wei Yen, Bo Zhao, Patrick Koch, Ruben Krasnopolsky, Zhi-Yun Li, Nagayoshi Ohashi, Hsien Shang, Shigehisa Takakuwa, Ya-Wen Tang EA Abstract: We present our observational results of the 0.87 mm polarized dust emission in the Class 0 protostar B335 obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) at a 0.2" (20 au) resolution. We compared our data at 0.87 mm with those at 1.3 mm from the ALMA archive. The observed polarization orientat… ▽ More 2020. ApJ EA
  • 14. arXiv:2003.04379 On the early evolution of massive star clusters: the case of cloud D1 and its embedded cluster in NGC 5253 Authors: Sergiy Silich, Guillermo Tenorio-Tagle, Sergio Martinez-Gonzalez, Jean Turner Abstract: We discuss a theoretical model for the early evolution of massive star clusters and confront it with the ALMA, radio and infrared observations of the young stellar cluster highly obscured by the molecular cloud D1 in the nearby dwarf spheroidal galaxy NGC 5253. We show that a large turbulent pressure in the central zones of D1 cluster may cause individual wi… ▽ More MNRAS Oth (Mexico)
  • 15. arXiv:2003.04334 An ALMA view of SO and SO2 around oxygen-rich AGB stars Authors: T. Danilovich, A. M. S. Richards, L. Decin, M. Van de Sande, C. A. Gottlieb Abstract: …, recently observed with high angular resolution and sensitivity in a spectral line survey with ALMA, for two oxygen-rich AGB stars: the low mass-loss rate R Dor and high mass-loss rate IK Tau. We analyse 8 lines of SO detected towards both stars, 78 lines of SO2detected towards R Dor and 52 lines of SO2 detected towards IK Tau. We detect several lines… ▽ More MNRAS Eu
  • 16. arXiv:2003.02298 Importance of radiative effects in gap opening by planets in protoplanetary disks Authors: Alexandros Ziampras, Wilhelm Kley, Cornelis P. Dullemond Abstract: Recent ALMA observations revealed concentric annular structures in several young class-II objects. In an attempt to produce the rings and gaps in some of these systems, they have been modeled numerically with a single embedded planet assuming a locally isothermal equation of state. This is often justified by observations targeting the irradiation-dominated o… ▽ More Astronomy and Astrophysics (A&A) Eu
  • 17. arXiv:2003.01845 Molecule formation in dust-poor irradiated jets I. Stationary disk winds Authors: B. Tabone, B. Godard, G. Pineau des Forêts, S. Cabrit, E. F. van Dishoeck Abstract: Recent ALMA observations suggest that the highest velocity part of molecular protostellar jets are launched from the dust-sublimation regions of the accretion disks (<0.3 au). However, formation and survival of molecules in inner protostellar disk winds, in the presence of a harsh FUV radiation field and the absence of dust, remain unexplored. We aim at d… ▽ More A&A Eu
  • 18. arXiv:2003.01650 ALMA 50-parsec resolution imaging of jet-ISM interaction in the lensed quasar MGJ0414+0534 Authors: Kaiki Taro Inoue, Satoki Matsushita, Kouichiro Nakanishi, Takeo Minezaki Abstract: We report our high-resolution (0.03 arcsec to 0.07 arcsec) ALMA imaging of the quadruply lensed radio-loud quasar MG\,J0414+0534 at redshift z=2.639 in the continuum and the broad CO(11-10) line at ∼340GHz. With the help of strong lensing magnification and ALMA's high-resolution, we succeeded in resolving… ▽ More ApJ Letters EA
  • 19. arXiv:2003.01148 A ringed pole-on outflow from DO Tauri revealed by ALMA Authors: M. Fernández López, L. A. Zapata, L. F. Rodríguez, M. M. Vazzano, A. E. Guzmán, R. López Abstract: We present new ALMA Band 6 observations including the CO(2-1) line and 1.3 mm continuum emission from the surroundings of the young stellar object DO Tauri. The ALMA CO molecular data show three different series of rings at different radial velocities. These rings have radii around 220 au and 800 au. We make individual… ▽ More ApJ Other (Argentina) B6
  • 20. arXiv:2003.00525 ALMA Observations of Quasar Host Galaxies at z≃4.8 Authors: Nathen H. Nguyen, Paulina Lira, Benny Trakhtenbrot, Hagai Netzer, Claudia Cicone, Roberto Maiolino, Ohad Shemmer Abstract: We present ALMA band-7 data of the [CII] λ157.74μm emission line and underlying far-infrared (FIR) continuum for twelve luminous quasars at z≃4.8, powered by fast-growing supermassive black holes (SMBHs). Our total sample consists of eighteen quasars, twelve of which are presented here for the first time. The new sources consists of… ▽ More Chile B7
  • 21. arXiv:2003.00079 Dust depleted inner disks in a large sample of transition disks through long-baseline ALMA observations Authors: Logan Francis, Nienke van der Marel Abstract: Transition disks with large inner dust cavities are thought to host massive companions. However, the disk structure inside the companion orbit and how material flows toward an actively accreting star remain unclear. We present a high resolution continuum study of inner disks in the cavities of 38 transition disks. Measurements of the dust mass from archival Atacama Large Millimeter/Submillimeter A… ▽ More Astrophysical Journal, NA B6, B7, B3
  • 22. arXiv:2003.00013 The ALPINE-ALMA [CII] Survey: Size of Individual Star-Forming Galaxies at z=4-6 and their Extended Halo Structure Authors: S. Fujimoto, J. D. Silverman, Matthieu Bethermin, M. Ginolfi, G. C. Jones, O. Le Fèvre, M. Dessauges-Zavadsky, W. Rujopakarn, A. L. Faisst, Y. Fudamoto, P. Cassata, L. Morselli, D. Schaerer, P. Capak, L. Yan, L. Vallini, S. Toft, F. Loiacono, G. Zamorani, M. Talia, D. Narayanan, N. P. Hathi, B. C. Lemaux, Médéric Boquien, R. Amorin , et al. (8 additional authors not shown) Abstract: We present the physical extent of [CII] 158um line-emitting gas from 46 star-forming galaxies at z=4-6 from the ALMA Large Program to INvestigate CII at Early Times (ALPINE). Using exponential profile fits, we measure the effective radius of the [CII] line (r_e,[CII]) for individual galaxies and compare them with the rest-frame ultra-violet (UV) continuum ApJ Eu/EA
  • 23. arXiv:2003.12284 The MESAS Project: ALMA observations of the F-type stars γ Lep, γ Vir A, and γ Vir B Authors: Jacob Aaron White, F. Tapia-Vázquez, A. G. Hughes, A. Moór, B. Matthews, D. Wilner, J. Aufdenberg, A. M. Hughes, V. De la Luz, A. Boley Abstract: …emission in this regime is needed to test stellar atmosphere models, and is also essential for revealing emission associated with unresolved circumstellar debris. We present ALMA observations of the three nearby, main-sequence, debris-poor, F-type stars γ Lep, γ Vir A, and γ Vir B at 0.87 and 1.29 millimeters. We use these data to constrain semi-empirirical atmospheric models. We discuss the atmospheric structure of these stars, explore potential short term variability, and the potential impact on debris disk studies. These results are part of an ongoing campaign to obtain long wavelength observations of debris-poor stars, entitled Measuring the Emission of Stellar Atmospheres at Submillimeter/millimeter wavelengths (MESAS). ApJ, NA
  • 24. arXiv:2003.11045 Authors: Jian-Yang Li, Arielle Moullet, Timothy N. Titus, Henry H. Hsieh, Mark V. Sykes Abstract: We observed Ceres at three epochs in 2015 November and 2017 September and October with ALMA 12-meter array and in 2017 October with the ALMA Compact Array (ACA), all at ~265 GHz continuum (wavelengths of ~1.1 mm) to map the temperatures of Ceres over a full rotation at each epoch. We also used 2017 October B6 ACA observations. Ceres’s lightcurve is likely dominated by
spatial variations in its physical or compositional properties that cause changes in Ceres’s observed thermal properties and dielectric absorption as it rotates. NA
  • 25. arXiv:2003.09353 Scattering-induced intensity reduction: large mass content with small grains in the inner region of the TW Hya disk Authors: Takahiro Ueda, Akimasa Kataoka, Takashi Tsukagoshi Abstract: …intensity, which results in an underestimate in the dust mass. We investigate whether the dust scattering indeed reduces the observed continuum intensity by comparing the ALMA archival data of the TW Hya disk at Band 3, 4, 6, 7 and 9 to models obtained by radiative transfer simulations. We find that the model with scattering by 300 μm-sized grains well reproduces the observed SED of the central part of the TW Hya disk while the model without scattering is also consistent within the errors of the absolute fluxes. Our study suggests the TW Hya disk is still capable of forming cores of giant planets at where the current solar system planets exist. ApJ EA
  • 26. arXiv:2003.13694 Emergence of an Ultra-Red Ultra-Massive Galaxy Cluster Core at z=4 Authors: Arianna S. Long, Asantha Cooray, Jingzhe Ma, Caitlin M. Casey, Julie L. Wardlow, Hooshang Nayyeri, R. J. Ivison, Duncan Farrah, Helmut Dannerbauer Abstract: Recent simulations and observations of massive galaxy cluster evolution predict that the majority of stellar mass build up happens within cluster members by z=2, before cluster virialization. Protoclusters rich with dusty, star-forming galaxies (DSFGs) at z>3 are the favored candidate progenitors for these massive galaxy clusters at z∼0. We present here the first study analyzing stellar emission along with cold dust and gas continuum emission in a spectroscopically confirmed z=4.002 protocluster core rich with DSFGs, the Distant Red Core (DRC). We combine new \textit{HST} and \textit{Spitzer} data with existing Gemini, \textit{Herschel}, and ALMA observations to derive individual galaxy-level properties, and compare them to coeval field and other protocluster galaxies. All of the protocluster members are massive (>1010 M⊙), but not significantly more so than their coeval field counterparts. Within uncertainty, all are nearly indistinguishable from galaxies on the star-forming vs. stellar mass main-sequence relationship. However, when placed on the star formation efficiency plane, DRC components exhibit starburst-like characteristics with SFRs 10-100× greater than the expected field value at a given molecular gas mass. Assuming no future major influx of fresh gas, we estimate that these gas poor (fgas<25%) yet bursty DSFGs will deplete their gas reservoirs in <30 Myr. Using various methodologies, we derive a total z=4 halo mass of ∼1014 M⊙, and estimate that the DRC will evolve to become an ultra-massive cluster core of mass ≳1015 M⊙ by z=0. ApJ NA
  • 27. arXiv:2003.13534 ALMA observations of NGC 6334S − I: Forming massive stars and cluster in subsonic and transonic filamentary clouds Authors: Shanghuo Li, Qizhou Zhang, Hauyu Baobab Liu, Henrik Beuther, Aina Palau, Josep Miquel. Girart, Howard Smith, Joseph L. Hora, Yuxing Lin, Keping Qiu, Shaye Strom, Junzhi Wang, Fei Li, Nannan Yue Abstract: We present Atacama Large Millimeter/submillimeter Array (ALMA) and Karl G. Jansky Very Large Array (JVLA) observations of the massive infrared dark cloud NGC 6334S (also known as IRDC G350.56+0.44), located at the southwestern end of the NGC 6334 molecular cloud complex. The H13CO+ and the NH2D lines covered by the ALMA observations at a ∼3′′ angular resolution (∼0.02 pc) reveal that the spatially unresolved non-thermal motions are predominantly subsonic and transonic, a condition analogous to that found in low-mass star-forming molecular clouds. The observed supersonic non-thermal velocity dispersions in massive star forming regions, often reported in the literature, might be significantly biased by poor spatial resolutions that broaden the observed line widths due to unresolved motions within the telescope beam. Our 3~mm continuum image resolves 49 dense cores, whose masses range from 0.17 to 14 M⊙. The majority of them are resolved with multiple velocity components. Our analyses of these gas velocity components find an anti-correlation between the gas mass and the virial parameter. This implies that the more massive structures tend to be more gravitationally unstable. Finally, we find that the external pressure in the NGC 6334S cloud is important in confining these dense structures, and may play a role in the formation of dense cores, and subsequently, the embedded young stars. ApJ .5NA .5 Other: China
  • 28. arXiv:2003.13436 Detection of deuterated molecules, but not of lithium hydride, in the z=0.89 absorber toward PKS1830-211 Authors: S. Muller, E. Roueff, J. H. Black, M. Gerin, M. Guelin, K. M. Menten, C. Henkel, S. Aalto, F. Combes, S. Martin, I. Marti-Vidal Abstract: …of deuterated molecules and a search for lithium hydride, 7LiH, at redshift z=0.89 in the spiral galaxy intercepting the line of sight to the quasar PKS1830-211. We used ALMA to observe several submillimeter lines of ND, NH2D, and HDO, and their related isotopomers NH2, NH3, and H2^18O, in absorption against the southwest image of the quasar, allowing us to… ▽ More A&A Eu
  • 29. arXiv:2003.12580 Protoplanetary Disks in the Orion Nebula Cluster: Gas Disk Morphologies and Kinematics as seen with ALMA Authors: Ryan D. Boyden, Josh A. Eisner Abstract: We present Atacama Large Millimeter Array CO(3−2) and HCO+(4−3) observations covering the central 1.′5×1.′5 region of the Orion Nebula Cluster (ONC). The unprecedented level of sensitivity (∼0.1 mJy beam−1) and angular resolution (∼0.′′09≈35 AU) of these line observations enable us to search for gas-disk detections towards the known positions of submillimeter-detected dust disks in this region. We detect 23 disks in gas: 17 in CO(3−2), 17 in HCO+(4−3), and 11 in both lines. Depending on where the sources are located in the ONC, we see the line detections in emission, in absorption against the warm background, or in both emission and absorption. We spectrally resolve the gas with 0.5 km s−1 channels, and find that the kinematics of most sources are consistent with Keplerian rotation. We measure the distribution of gas-disk sizes and find typical radii of ∼50-200 AU. As such, gas disks in the ONC are compact in comparison with the gas disks seen in low-density star-forming regions. Gas sizes are universally larger than the dust sizes. However, the gas and dust sizes are not strongly correlated. We find a positive correlation between gas size and distance from the massive star θ1 Ori C, indicating that disks in the ONC are influenced by photoionization. Finally, we use the observed kinematics of the detected gas lines to model Keplerian rotation and infer the masses of the central pre-main-sequence stars. Our dynamically-derived stellar masses are not consistent with the spectroscopically-derived masses, and we discuss possible reasons for this discrepancy. ApJ NA

Also of interest--white paper
  • A. arXiv:2003.05714 SPHERE+: Imaging young Jupiters down to the snowline Authors: A. Boccaletti, G. Chauvin, D. Mouillet, O. Absil, F. Allard, S. Antoniucci, J. -C. Augereau, P. Barge, A. Baruffolo, J. -L. Baudino, P. Baudoz, M. Beaulieu, M. Benisty, J. -L. Beuzit, A. Bianco, B. Biller, B. Bonavita, M. Bonnefoy, J. -C. Bouret, W. Brandner, N. Buchschache, B. Carry, F. Cantalloube, E. Cascone, A. Carlotti , et al. (105 additional authors not shown) Abstract: …of SPHERE+ described in this document will open a new and compelling scientific window for the upcoming decade in strong synergy with ground-based facilities (VLT/I, ELT, ALMA, and SKA) and space missions (Gaia, JWST, PLATO and WFIRST). While SPHERE has sampled the outer parts of planetary systems beyond a few tens of AU, SPHERE+ will dig into the inner regi… ▽ More White paper submitted to ESO on Feb. 20th, 2020 Eu

Not new ALMA data:

  • B. arXiv:2003.02298 Importance of radiative effects in gap opening by planets in protoplanetary disks Authors: Alexandros Ziampras, Wilhelm Kley, Cornelis P. Dullemond Abstract: Recent ALMA observations revealed concentric annular structures in several young class-II objects. In an attempt to produce the rings and gaps in some of these systems, they have been modeled numerically with a single embedded planet assuming a locally isothermal equation of state. This is often justified by observations targeting the irradiation-dominated o… ▽ More A&A EU Unspecified archival data.
  • C. arXiv:2003.01845 Molecule formation in dust-poor irradiated jets I. Stationary disk winds Authors: B. Tabone, B. Godard, G. Pineau des Forêts, S. Cabrit, E. F. van Dishoeck Abstract: Recent ALMA observations suggest that the highest velocity part of molecular protostellar jets are launched from the dust-sublimation regions of the accretion disks (<0.3 au). However, formation and survival of molecules in inner protostellar disk winds, in the presence of a harsh FUV radiation field and the absence of dust, remain unexplored. We aim at d… ▽ More A&A Eu Theory
  • D. arXiv:2003.01167 Dust dynamics and vertical settling in gravitoturbulent protoplanetary discs Authors: A. Riols, B. Roux, H. Latter, G. Lesur Abstract: …to the turbulent accumulation of dust grains. Finally, the large dust scale-height measured in simulations could be, in the future, compared with that of edge-on discs seen by ALMA, thus aiding detection and characterisation of GI in real systems. ▽ More MNRAS Eu Theory
  • E. Mock ALMA data:arXiv:2003.08984 Origin of Star-Forming Rings around Massive Centres in Massive Galaxies at z<4 Daniel Ceverino, Joel Primack, Mauro Giavalisco, Zhiyuan Ji Abstract: Mock images of simulated rings through dust indicate qualitative consistency with observed rings about bulges in massive z∼0.5−3 galaxies, in Hα and in deep HST imaging. ALMA mock images indicate that z∼0.5−1 rings should be detectable. We quote expected observable properties and abundancescof rings and their central blue or red nuggets for comparison to observations. MNRAS NA, Other: Israel
  • F. arXiv:2004.00934 High-redshift star formation in the ALMA era Authors: Jacqueline A. Hodge, Elisabete da Cunha Abstract: The Atacama Large Millimetre/submillimetre Array (ALMA) is currently in the process of transforming our view of star-forming galaxies in the distant (z≳1) universe. Invited Review for Royal Society Open Science, 60 pages + references Eu
  • G. arXiv:2004.00519 Chemical equilibrium in AGB atmospheres: successes, failures, and prospects for small molecules, clusters, and condensates Authors: M. Agundez, J. I. Martinez, P. L. de Andres, J. Cernicharo, J. A. Martin-Gago Abstract: Chemical equilibrium has proven extremely useful to predict the chemical composition of AGB atmospheres. Here we use a recently developed code and an updated thermochemical database, including gaseous and condensed species involving 34 elements, to compute the chemical equilibrium composition of AGB atmospheres of M-, S-, and C-type stars. We include for the first time TixCy clusters, with x = 1-4 and y = 1-4, and selected larger clusters ranging up to Ti13C22, for which thermochemical data is obtained from quantum chemical calculations. We find that in general chemical equilibrium reproduces well the observed abundances of parent molecules in circumstellar envelopes of AGB stars. There are however severe discrepancies, of various orders of magnitude, for some parent molecules: HCN, CS, NH3, and SO2 in M-type stars, H2O and NH3 in S-type stars, and the hydrides H2O, NH3, SiH4, and PH3 in C-type stars. Several molecules not yet observed in AGB atmospheres, like SiC5, SiNH, SiCl, PS, HBO, and the metal-containing molecules MgS, CaS, CaOH, CaCl, CaF, ScO, ZrO, VO, FeS, CoH, and NiS, are good candidates for detection with observatories like ALMA. The first condensates predicted are carbon, TiC, and SiC in C-rich atmospheres and Al2O3 in O-rich outflows. The most probable gas-phase precursors of dust are acetylene, atomic carbon, and/or C3 for carbon dust, SiC2 and Si2C for SiC dust, and atomic Al and AlOH, AlO, and Al2O for Al2O3 dust. In the case of TiC dust, atomic Ti is probably the main supplier of titanium. However, chemical equilibrium predicts that clusters like Ti8C12 and Ti13C22 become the major reservoirs of titanium at the expense of atomic Ti in the region where condensation of TiC is expected to occur, suggesting that the assembly of large TixCy clusters could be related to the formation of the first condensation nuclei of TiC. Eu
  • H. arXiv:2003.13280 Circum-nuclear molecular disks: role in AGN fueling and feedback Authors: F. Combes Abstract: Gas inflows fueling AGN are now traceable at high-resolution with ALMA and NOEMA. Dynamical mechanisms are essential to exchange angular momentum and drive the gas to the super-massive black hole. While at 100pc scale, the gas is sometimes stalled in nuclear rings, recent observations reaching 10pc scale (50mas), inside the sphere of influence of the black h… ▽ More Proceedings of IAUS 359, Storchi-Bergmann et al. ed Eu

-- AlWootten - 2020-03-23
Topic revision: r3 - 2020-04-05, AlWootten
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding NRAO Public Wiki? Send feedback