• Apr 27: This week:9 Eu:4 NA:1 EA:4 CHile:0 Other:0 NAASC/UVa: 2 B6: 6
  • Apr20: week:5 Eu:4 NA: EA:1 CHile:0 Other:0
  • Apr 13: week:3 Eu:1 NA:2 EA:0 CHile:0 Other:0
  • Apr month: 23 Eu: 11 NA: 6 EA: 6 Ch: 0 Other: 2
  • Mar month: 29 Eu:11 NA:8.5 EA:7 CHile:1 Other: 2.5

  • 1. arXiv:2004.07591 Transient brightenings in the quiet Sun detected by ALMA at 3 mm Authors: A. Nindos, C. E. Alissandrakis, S. Patsourakos, T. S. Bastian Abstract: Using ALMA observations, we performed the first systematic survey for transient brightenings (i.e. weak, small-scale episodes of energy release) in the quiet solar chromosphere at 3 mm. Our dataset included images of six 87'' x 87'' regions of the quiet Sun obtained with angular resolution of a few arcsec at a cadence of 2 s. detect, for the first time, a significant number of weak 3 mm quiet Sun transient brightenings. However,their energy budget falls short of meeting the requirements for the heating of the upper layers of the solar atmosphere B3 A&A,Eu
  • 2. arXiv:2004.07257 Constraining the radial drift of millimeter-sized grains in the protoplanetary disks in Lupus Authors: L. Trapman, M. Ansdell, M. R. Hogerheijde, S. Facchini, C. F. Manara, A. Miotello, J. P. Williams, S. Bruderer Abstract: Recent ALMA surveys of protoplanetary disks have shown that for most disks the extent of the gas emission is greater than the extent of the thermal emission of the millimeter-sized dust. Both line optical depth and the combined effect of radially dependent grain growth and radial drift may contribute to this observed effect. For a sample of 10 disks of predominantly bright disks are consistent with radial drift and grain growth. We also find six faint disks where the observed gas–dust size difference hints at considerable radial drift and grain growth, suggesting that these are common features among both bright and faint disks. The effects of radial drift and grain growth can be observed in disks where the dust and gas radii are significantly different, while more detailed models and deeper observations are needed to see this effect in disks with smaller differences. B6&7 A&A Eu
  • 3. arXiv:2004.06730 Radio linear polarization of GRB afterglows: Instrumental Systematics in ALMA observations of GRB 171205A Authors: Tanmoy Laskar, Charles L. H. Hull, Paulo Cortes Abstract: …is vital for a robust physical interpretation of polarization data, requiring tests of and validations against potential instrumental systematics. We illustrate this with ALMA Band 3 (97.5 GHz) observations of GRB 171205A taken ≈5.19 days after the burst, where a detection of linear polarization was recently claimed. We present a compilation of polarization observations of GRB radio afterglows, and demonstrate that a significant improvement in sensitivity is desirable for eventually detecting signals polarized at the ≈0.1% level from typical radio afterglows. B3 ApJ Eu
  • 4. arXiv:2004.06685 Searching for the near infrared counterpart of Proxima c using multi-epoch high contrast SPHERE data at VLT Authors: R. Gratton, A. Zurlo, H. Le Coroller, M. Damasso, F. Del Sordo, M. Langlois, D. Mesa, J. Milli, G. Chauvin, S. Desidera, J. Hagelberg, E. Lagadec, A. Vigan, A. Boccaletti, M. Bonnefoy, W. Brandner, S. Brown, F. Cantalloube, P. Delorme, V. D'Orazi, M. Feldt, R. Galicher, T. Henning, M. Janson, P. Kervella , et al. (21 additional authors not shown) Abstract: The position of this candidate and the orientation of its orbital plane fit well with observations in the ALMA 12m array image. However, the astrometric signal expected from the orbit of the candidate we detected is 3-sigma away from the astrometric motion of Proxima as measured from early Gaia data. If confirmed, this would be the first observation in imaging of a planet discovered from radial velocities and the second one (after Fomalhaut b) of reflecting circumplanetary material. Further confirmation observations should be done as soon as possible. Astronomy and Astrophysics Eu
  • 5. arXiv:2004.06123 Star formation traced by optical and millimeter hydrogen recombination lines and free-free emissions in the dusty merging galaxy NGC 3256 -- MUSE/VLT and ALMA synergy Authors: Tomonari Michiyama, Daisuke Iono, Kouichiro Nakanishi, Junko Ueda, Toshiki Saito, Takuji Yamashita, Alberto Bolatto, Min Yun Abstract: Multi Unit Spectroscopic Explorer at the Very Large Telescope of the European Southern Observatory (MUSE/VLT) and the Atacama Large Millimeter/submillimeter Array (ALMA). The Hβ image obtained by MUSE identifies star-forming regions outside the nuclear regions, suggesting a disk-wide starburst. In contrast, the H40α image obtained by by ALMA identifies a nuclear starburst where optical lines are undetected due to dust extinction (AV∼25). Combining both MUSE and ALMA observations, we conclude that the total SFR is 49±2 M⊙~yr−1 and the contributions from nuclear and disk-wide starbursts are ∼34 % and ∼66 %, respectively.This suggests the dominance of disk-wide star formation in NGC~3256. In addition, pixel-by-pixel analyses for disk-wide star-forming regions suggest that shock gas tracers (e.g., CH3OH) are enhanced where gas depletion time (τgas=Mgas/SFR) is long. This possibly means that merger-induced shocks regulate disk-wide star formation activities. APJ accepted EA
  • 6. arXiv:2004.04176 Etching glass in the early Universe: Luminous HF and water emission in a QSO-SMG pair at z=4.7 Authors: M. D. Lehnert, C. Yang, B. H. C. Emonts, A. Omont, E. Falgarone, P. Cox, P. Guillard Abstract: We present ALMA observations of hydrogen fluoride, HF J=1-0, H20 (202-211), and the 1.2 THz rest-frame continuum emission from the z=4.7 system BR1202-0725. BR1202-0725 is a galaxy group consisting of a QSO, a sub-millimeter galaxy (SMG), and two Ly-alpha emitters. We detected HF in emission in the QSO and possibly in absorption in the SMG, while water is detected in emission in both the QSO and SMG. The QSO is the most luminous HF emitter yet found and has the same ratio of HF emission line to infrared luminosity as a sample of local AGN and the Orion Bar. This consistency covers about 10 orders-of-magnitude in infrared luminosity, L_IR. Based on the conclusions of a study of HF emission in the Orion Bar and modeling, the HF emission in the QSO is either excited by collisions with electrons and H2 in molecular plasmas irradiated by the AGN and intense star formation or predominately by collisions with H2, with a modest contribution from electrons, in a relatively high temperature (~120 K), dense (~10^5 cm^-3) medium. Although HF should be an excellent tracer of molecular outflows, we do not find strong evidence for outflows in HF in either the QSO or the SMG. From a putative absorption feature in HF in the SMG, we estimate an upper limit on the outflow rate, dM/dt_outflow <~45 M_sun/yr. The ratio of the outflow rate to the star formation rate is <5% for the SMG. The broadness of the H2O line in the SMG, FWHM~1020 km/s, may suggest that either the gas on large scales (>4 kpc) is significantly more disturbed and turbulent due either to interactions and mass exchange with the other members of the group or to the dissipation of the energy of the intense star formation or both. The lack of significant molecular outflows in either source may imply that much of the energy from the intense star formation and AGN activity in this pair is being dissipated in their ISM. A&A Eu
  • 7. arXiv:2004.03748 Probing the Temperature Structure of Optically Thick Disks Using Polarized Emission of Aligned Grains Authors: Zhe-Yu Daniel Lin, Zhi-Yun Li, Haifeng Yang, Leslie Looney, Chin-Fei Lee, Ian Stephens, Shih-Ping Lai Abstract: …Models of stellar irradiated disks with and without accretion heating. The promises and challenges of the technique are illustrated with a number of Class 0 and I disks with ALMA dust polarization data, including NGC 1333 IRAS4A1, IRAS 16293B, BHB 07-11, L1527, HH 212 and HH 111. We find, in particular, that the sight lines passing through the near-side of a… ▽ More MNRAS, Volume 493, Issue 4, April 2020, Pages 4868-4883 NA
  • 8. arXiv:2004.03135 GW Ori: Interactions Between a Triple-star System and its Circumtriple Disk in Action Authors: Jiaqing Bi, Nienke van der Marel, Ruobing Dong, Takayuki Muto, Rebecca G. Martin, Jeremy L. Smallwood, Jun Hashimoto, Hauyu Baobab Liu, Hideko Nomura, Yasuhiro Hasegawa, Michihiro Takami, Mihoko Konishi, Munetake Momose, Kazuhiro D. Kanagawa, Akimasa Kataoka, Tomohiro Ono, Michael L. Sitko, Sanemichi Z. Takahashi, Kengo Tomida, Takashi Tsukagoshi Abstract: GW Ori is a hierarchical triple system which has a rare circumtriple disk. We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of 1.3 mm dust continuum and 12CO J=2-1 molecular gas emission of the disk. For the first time, we identify three dust rings in the disk at ~46, 188, and 338 AU, with estimated dust mass of ~70-250 Earth mass, M, respectively. To our knowledge, the outer ring in GW Ori is the largest dust ring ever found in protoplanetary disks. We use visibility modelling of dust continuum to show that the disk has misaligned parts and the innermost dust ring is eccentric. The disk misalignment is also suggested by the CO kinematics modelling. We interpret these substructures as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk. ApJL NA
  • 9. arXiv:2004.10989 Super-resolution Imaging of the Protoplanetary Disk HD 142527 Using Sparse Modeling Authors: Masayuki Yamaguchi, Kazunori Akiyama, Takashi Tsukagoshi, Takayuki Muto, Akimasa Kataoka, Fumie Tazaki, Shiro Ikeda, Misato Fukagawa, Mareki Honma, Ryohei Kawabe Abstract:. In this study, sparse modeling (SpM) is applied for the first time to observational data sets of protoplanetary disks taken by the Atacama Large Millimeter/submillimeter Array (ALMA). The two data sets used in this study were taken independently using different array configurations at Band 7 (330 GHz), targeting the protoplanetary disk around HD 142527. Submitted 23 April, 2020; originally announced April 2020. B7 EA
  • 9. arXiv:2004.10771 The ALPINE-ALMA [CII] survey: Molecular gas budget in the Early Universe as traced by [CII] Authors: M. Dessauges-Zavadsky, M. Ginolfi, F. Pozzi, M. Béthermin, O. Le Fèvre, S. Fujimoto, J. D. Silverman, G. C. Jones, D. Schaerer, A. L. Faisst, Y. Khusanova, Y. Fudamoto, P. Cassata, F. Loiacono, P. L. Capak, L. Yan, R. Amorin, S. Bardelli, M. Boquien, A. Cimatti, C. Gruppioni, N. P. Hathi, E. Ibar, A. M. Koekemoer, B. C. Lemaux , et al. Abstract: The molecular gas content of normal galaxies at z > 4 is poorly constrained, because the commonly used molecular gas tracers become hard to detect at these redshifts. We use the [C ii] 158 um luminosity, recently proposed as a molecular gas tracer, to estimate the molecular gas content in a large sample of main-sequence star-forming galaxies at z = 4.4 to 5.9, with a median stellar mass of 10^9.7 Msun, drawn from the ALMA Large Program to INvestigate [CII] at Early times (ALPINE) survey. The agreement between molecular gas masses derived from [CII] luminosity, dynamical mass, and rest-frame 850um luminosities, extrapolated from the rest-frame 158 m continuum, supports [C ii] as a reliable tracer of molecular gas in our sample. Submitted to Astronomy & Astrophysics B6, B7 Eu
  • 10. arXiv:2004.10760 The ALPINE-ALMA [CII] Survey: Dust Attenuation Properties and Obscured Star-Formation at z~4.4-5.8 Authors: Yoshinobu Fudamoto, P. A. Oesch, A. Faisst, M. Bethermin, M. Ginolfi, Y. Khusanova, F. Loiacono, O. Le Fevre, P. Capak, D. Schaerer, J. Silverman, P. Cassata, L. Yan, R. Amorin, S. Bardelli, M. Boquien, A. Cimatti, M. Dessauges-Zavadsky, S. Fujimoto, C. Gruppioni, N. P. Hathi, E. Ibar, G. C. Jones, A. M. Koekemoer, G. Lagache , et al. (12 additional authors not shown) Abstract: …obtained with the ALMA large program ALPINE. We study the connection between the UV spectral slope (β), stellar mass (M⋆), and infrared excess (IRX=LIR/LUV). Twenty-three galaxies are individually detected in the continuum at >3.5σ significance. We perform a stacking analysis using both detections and non-detections to st… ▽ More Submitted to Astronomy & Astrophysics. Table will be released upon acceptance of the paper B6, B7 Eu
  • 11. arXiv:2004.10094 TW Hya: an old protoplanetary disc revived by its planet Authors: Sergei Nayakshin, Takashi Tsukagoshi, Cassandra Hall, Allona Vazan, Ravit Helled, Jack Humphries, Farzana Meru, Patrick Neunteufel, Olja Panic, Daniel Price Abstract: …rims are the indirect signposts of planets embedded in protoplanetary discs. In a recent first, an azimuthally elongated AU-scale blob, possibly a planet, was resolved with ALMA in TW Hya. The blob is at the edge of a cliff-like rollover in the dust disc rather than inside a dark ring. Here we build time-dependent models of TW Hya disc. We find that the clas… ▽ More Accepted to MNRAS, 22 pages B6 Eu
  • 12. arXiv:2004.09586 Unusually High CO Abundance of the First Active Interstellar Comet Authors: Cordiner, M. A., Milam, S. N., Biver, N., Bockelée-Morvan, D., Roth, N. X., Bergin, E. A., Jehin, E., Remijan, A. J., Charnley, S. B., Mumma, M. J., Boissier, J., Crovisier, J., Paganini , et al. (5 additional authors not shown) Abstract: …we present high-resolution, interferometric observations of 2I/Borisov, the first confirmed interstellar comet, obtained using the Atacama Large Millimeter/submillimeter Array (ALMA) on 15th-16th December 2019. Our observations reveal emission from hydrogen cyanide (HCN), and carbon monoxide (CO), coincident with the expected position of 2I/Borisov's nuc… ▽ More Nature Astronomy B7 NA
  • 13. arXiv:2004.09532 ALMA Observations of Massive Clouds in the Central Molecular Zone: Jeans Fragmentation and Cluster Formation Authors: Xing Lu, Yu Cheng, Adam Ginsburg, Steven N. Longmore, J. M. Diederik Kruijssen, Cara Battersby, Qizhou Zhang, Daniel L. Walker Abstract: We report ALMA Band 6 continuum observations of 2000 AU resolution toward four massive molecular clouds in the Central Molecular Zone of the Galaxy. To study gas fragmentation, we use the dendrogram method to identify cores as traced by the dust continuum emission. The four clouds exhibit different fragmentation states at the observed resolution despite havi… ▽ More ApJ Letters accepted. A full catalog of the identified cores is available as a machine-readable table (https://doi.org/10.5281/zenodo.3735708) B6 EA
  • 14. arXiv:2004.09394 AGN X-ray irradiation of CO gas in NGC 2110 revealed by Chandra and ALMA Authors: Taiki Kawamuro, Takuma Izumi, Kyoko Onishi, Masatoshi Imanishi, Dieu D. Nguyen, Shunsuke Baba Abstract: …and ALMA at ≈ 0.5 arcsec. A Chandra 6.2--6.5 keV-to-3.0--6.0 keV image suggests that the Fe-Kα emission extends preferentially in a northwest-to-southeast direction out to ∼ 3 arcsec, or 500 pc, on each side. Spatially-resolved spectral analyses support this by finding significant Fe-Kα emission lines only in northwest and southeast regio… ▽ More Accepted for publication in ApJ B6 EA
  • 15. arXiv:2004.09369 A Massive Molecular Torus inside a Gas-Poor Cirnumnuclear Disk in the Radio Galaxy NGC 1052 Discovered with ALMA Authors: Seiji Kameno, Satoko Sawada-Satoh, C. M. Violette Impellizzeri, Daniel Espada, Naomasa Nakai, Hajime Sugai, Yuichi Terashima, Kotaro Kohno, Minju Lee, Sergio Martín Abstract: We report ALMA observations of NGC 1052 to quest mass accretion in a gas-poor active galactic nucleus (AGN). We detected CO emission representing a rotating ring-like circumnuclear disk (CND) seen edge-on with the gas mass of 5.3×105 M⊙. The CND has smaller gas mass than that in typical Seyfert galaxies with circumnuclear star formation… ▽ More Accepted for publication in ApJ B6, B7 EA (JAO)
  • 16. arXiv:2004.08804 Constraining MHD disk winds with ALMA. Apparent rotation signatures and application to HH212 Authors: B. Tabone, S. Cabrit, G. Pineau des Forêts, J. Ferreira, A. Gusdorf, L. Podio, E. Bianchi, E. Chapillon, C. Codella, F. Gueth Abstract: …is always underestimated. Only comparison with synthetic predictions can take into account properly all observational effects. As an application, we present a comparison with ALMA observations of HH212 at resolutions from 250 au to 16 au, which represents the most stringent observational test of MHD DW to date. This comparison confirms our predicted biases f… ▽ More Accepted for publication in A&A B7 (2017) Eu
  • 17. arXiv:2004.14643 Independent Core Rotation in Massive Filaments in Orion Authors: Xuefang Xu, Di Li, Y. Sophia Dai, Gary A. Fuller, Nannan Yue Abstract: We present high-angular-resolution ALMA (Atacama Large Millimeter Array) images of N2H+ (1--0) that has been combined with those from the Nobeyama telescope toward OMC-2 and OMC-3 filamentary regions. The filaments (with typical widths of ∼ 0.1 pc) and dense cores are resolved. The measured 2D velocity gradients of cores are between 1.3 and 16… ▽ More OTHER (China) BACA
  • 18. arXiv:2004.14122 Substructure Formation in a Protostellar Disk of L1527 IRS Authors: Riouhei Nakatani, Hauyu Baobab Liu, Satoshi Ohashi, Yichen Zhang, Tomoyuki Hanawa, Claire Chandler, Yoko Oya, Nami Sakai t: We analyze multi-frequency, high-resolution continuum data obtained by ALMA and JVLA to study detailed structure of the dust distribution in the infant disk of a Class~0/I source, L1527 IRS. We find three clumps aligning in the north-south direction in the 7mm radio continuum image. The three clumps remain even after subtracting free-free contamin… ▽ More EA B3, B4, B7
  • 19. arXiv:2004.13739 A Detailed View of the Circumstellar Environment and Disk of the Forming O-star AFGL 4176 Authors: K. G. Johnston, M. G. Hoare, H. Beuther, H. Linz, P. Boley, R. Kuiper, N. D. Kee, T. P. Robitaille Abstract: …a detailed analysis of the disk and circumstellar environment of the forming O-type star AFGL 4176 mm1, placing results from the Atacama Large Millimeter/submillimeter Array (ALMA) into context with multi-wavelength data. With ALMA, we detect seventeen 1.2 mm continuum sources within 5′′ (21,000 au) of AFGL 4… ▽ More The Astrophysical Journal, Eu B6
  • 20. arXiv:2004.13737 The ALPINE-ALMA [CII] Survey: CGM pollution and gas mixing by tidal stripping in a merging system at z~4.57 Authors: M. Ginolfi, G. C. Jones, M. Bethermin, A. Faisst, B. C. Lemaux, D. Schaerer, Y. Fudamoto, P. Oesch, M. Dessauges-Zavadsky, S. Fujimoto, S. Carniani, O. Le Fevre, P. Cassata, J. D. Silverman, P. Capak, Lin Yan, S. Bardelli, O. Cucciati, R. Gal, C. Gruppioni, N. P. Hathi, L. Lubin, R. Maiolino, L. Morselli, D. Pelliccia , et al. (3 additional authors not shown) Abstract: We present ALMA observations of a merging system at z ~ 4.57, observed as a part of the… ▽ More A&A,
Eu (LP) B7
  • 21. arXiv:2004.13722 Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign Authors: Thomas M. Esposito, Paul Kalas, Michael P. Fitzgerald, Maxwell A. Millar-Blanchaer, Gaspard Duchene, Jennifer Patience, Justin Hom, Marshall D. Perrin, Robert J. De Rosa, Eugene Chiang, Ian Czekala, Bruce Macintosh, James R. Graham, Megan Ansdell, Pauline Arriaga, Sebastian Bruzzone, Joanna Bulger, Christine H. Chen, Tara Cotten, Ruobing Dong, Zachary H. Draper, Katherine B. Follette, Li-Wei Hung, Ronald Lopez, Brenda C. Matthews , et al. (40 additional authors not shown) Abstract: …-band and ALMA fluxes for two disks revealed tentative evidence for differing grain properties. Finally, we found no preference for debris disks to be detected in scattered light if wide-separation substellar companions were present. ▽ More AJ. Published ALMA data cited. NA
  • 22. arXiv:2004.12597 Herschel Observations of Disks around Late-type Stars Authors: Angelle Tanner, Peter Plavchan, Geoff Bryden, Grant Kennedy, Luca Matrá, Patrick Cronin-Coltsmann, Patrick Lowrance, Todd Henry, Basmah Riaz, John E. Gizis, Adric Riedel, Elodie Choquet Abstract: …estimated from the spectral energy fit implies that any associated dust disk should have been resolved in the Herschel images but is not. TYC 7443-1102-1 has been observed with ALMA which resolves the emission at its location into two distinct sources making the Herschel excess most likely also due to a background galaxy. It is worth noting that this star is… ▽ More PASP NA
  • 23. arXiv:2004.12176 Measuring turbulent motion in planet-forming disks with ALMA: A detection around DM Tau and non-detections around MWC 480 and V4046 Sgr Authors: Kevin Flaherty, A. Meredith Hughes, Jacob B. Simon, Chunhua Qi, Xue-ning Bai, Alyssa Bulatek, Sean M. Andrews, David J. Wilner, Agnes Kospal Abstract: …only been directly constrained among a small number of planet forming disks. Building on the upper limits on turbulence placed in disks around HD 163296 and TW Hya, we present ALMA CO J=2-1 line observations at ∼0.3" (20-50 au) resolution and 80 ms−1 channel spacing of the disks around DM Tau, MWC 480, and V4046 Sgr. Using parametric models of… ▽ More ApJ NA

  • Also of interest:
  • A. arXiv:2004.06118 Reliably predicting FIR lines from simulated galaxies Authors: Alessandro Lupi, Andrea Pallottini, Andrea Ferrara, Stefano Bovino, Stefano Carniani, Livia Vallini Abstract: Far-infrared (FIR) emission lines are a powerful tool to investigate the properties of the interstellar medium, especially in high-redshift galaxies, where ALMA observations have provided unprecedented information. Interpreting such data with state-of-the-art cosmological simulations post-processed with CLOUDY, has provided insights on the internal structure and gas dynamics of these systems. However, no detailed investigation of the consistency and uncertainties of this kind of analysis has been performed to date. Here, we compare different approaches to estimate FIR line emission from state-of-the-art cosmological simulations, either with CLOUDY or with on-the-fly non-equilibrium chemistry. We find that [CII]158μ predictions are robust. [OI] emission lines are instead model-dependent, as these lines are strongly affected by the thermodynamic state of the gas and non-equilibrium photoionisation effects. For the same reasons, [OI] lines represent an excellent ISM diagnostic. Future observations targeting these lines will be also crucial to constrain models. MNRAS, Eu (Theory)
  • B. arXiv:2004.05818 The H2O Spectrum of the Massive Protostar AFGL 2136 IRS 1 from 2 to 13 μm at High Resolution: Probing the Circumstellar Disk uthors: Nick Indriolo, D. A. Neufeld, A. G. Barr, A. C. A. Boogert, C. N. DeWitt, A. Karska, E. J. Montiel, M. J. Richter, A. G. G. M. Tielens bstract: …O emission with ALMA. We postulate that the warm regions of this dust disk dominate the continuum emission at near-to-mid infrared wavelengths, and that H2O and several other molecules observed in absorption are probing this disk. Absorption line profiles are not symmetric, possibly indicating that the warm dust in the disk that produces the infrared continuum. Recent ALMA observations of AFGL 2136 IRS 1 have revealed a compact (93 × 71 mas) disk that shows Keplerian rotation in the H2O 2 = 1–1, 55,0-64,3 transition at 232.687 GHz. The velocity at which the strongest H2O absorption occurs in the infrared coincides with the H2O emission velocity centroid along the disk minor axis. We conclude that the H2O absorption observed in the infrared—as well as the absorption caused by other molecules that (1) have similar absorption profiles, and (2) indicate high rotational temperatures—arises within this circumstellar disk. Additionally, the warm dust in this disk is the dominant source of continuum emission at our observed wavelengths. Molecular absorption in the IR can thus serve as a powerful probe of accretion disks around massive protostars.ApJ accepted, EA No ALMA data.
  • C. arXiv:2004.06449 H2 content of galaxies inside and around intermediate redshift clustersAuthors: Damien Spérone-Longin Abstract: …far as 8 virial radii from the cluster center. Indeed there are ample evidence that star formation quenching starts already beyond 3 cluster virial radius. I discuss our CO(3-2) ALMA observations, which unveil a large fraction of galaxies with low gas-to-stellar mass ratios. Proceedings of IAUS 359, Storchi-Bergmann et al. ed (unrefereed)
  • D. arXiv:2004.09528 Warm dust in high-z galaxies: origin and implications Authors: L. Sommovigo, A. Ferrara, A. Pallottini, S. Carniani, S. Gallerani, D. Decataldo Abstract: ALMA observations have revealed the presence of dust in galaxies in the Epoch of Reionization (redshift z>6). However, the dust temperature, Td, remains unconstrained, and this introduces large uncertainties, particularly in the dust mass determinations. Using an analytical and physically-motivated model, we show that dust in high-z, star-forming g… ▽ More submitted to MNRAS EA
  • E. arXiv:2004.13742 Self-scattering of non-spherical dust grains Authors: Florian Kirchschlager, Gesa H. -M. Bertrang Abstract: The understanding of (sub-)millimetre polarisation has made a leap forward since high-resolution imaging with ALMA came available. Amongst other effects, self-scattering (i.e., scattering of thermal dust emission on other grains) is thought to be the origin of millimetre polarisation. This opens the first window to a direct measurement of dust grain sizes in… ▽ More A&A. Eu Not ALMA data.
  • F. arXiv:2004.14232 X-Shooter survey of disk accretion in Upper Scorpius I. Very high accretion rates at age>5 Myr Authors: C. F. Manara, A. Natta, G. P. Rosotti, J. M. Alcala, B. Nisini, G. Lodato, L. Testi, I. Pascucci, L. Hillenbrand, J. Carpenter, A. Scholz, D. Fedele, A. Frasca, G. Mulders, E. Rigliaco, C. Scardoni, E. Zari Abstract: …the current models of disk evolution. We present the analysis of the spectra of 36 targets in the ~5-10 Myr old Upper Scorpius region for which disk masses were measured with ALMA. We find that the mass accretion rates in this sample of old but still survived disks are similarly high as those of the younger (<3 Myr old) star-forming regions of Lupus and C… ▽ More Astronomy & Astrophysics. Eu

-- AlWootten - 2020-04-20

This topic: ALMA > Apr20arXiv
Topic revision: 2020-05-11, AlWootten
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