Low temperature MIR to submillimeter mass absorption coefficient of interstellar dust analogues. I. Mg-rich glassy silicates
Karine Demyk,C. Meny,X. H. Lu,G. N. Papatheodorou,M. J. Toplis,Hugues Leroux,Christophe Depecker,Jean-Blaise Brubach,Pascale Roy,Céline Nayral,Wilfried-Solo Ojo,Fabien Delpech,Deborah Paradis,V. Gromov +13 more
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In this paper, the mass absorption coefficient (MAC) of the samples was measured in the spectral domain 30-1000 μ m for grain temperature in the range 300-10 K and at room-temperature in the 5-40 μ m domain.Abstract:
Context. The submillimeter spectral domain has been extensively explored by the Herschel and Planck satellites and is now reachable from the ground with ALMA. A wealth of data, revealing cold dust thermal emission, is available for astronomical environments ranging from interstellar clouds, cold clumps, circumstellar envelops, and protoplanetary disks. The interpretation of these observations relies on the understanding and modeling of cold dust emission and on the knowledge of the dust optical properties. Aims. The aim of this work is to provide astronomers with a set of spectroscopic data of realistic interstellar dust analogues that can be used to interpret the observations. It pursues the experimental effort aimed at characterizing the spectroscopic properties of interstellar dust analogues at low temperature in the mid-infrared (MIR) to millimeter spectral domain. Compared to previous studies, it extends the range of studied dust analogues in terms of composition and of structure of the material. Methods. Glassy silicates of mean composition (1−x )MgO – x SiO2 with x = 0.35 (close to forsterite, Mg2 SiO4 ), 0.50 (close to enstatite, MgSiO3 ) and 0.40 (close to Mg1.5 SiO3.5 or MgSiO3 :Mg2 SiO4 = 50:50) were synthesized. The mass absorption coefficient (MAC) of the samples was measured in the spectral domain 30–1000 μ m for grain temperature in the range 300–10 K and at room temperature in the 5–40 μ m domain. Results. We find that the MAC of all samples varies with the grains temperature and that its spectral shape cannot be approximated by a single power law in λ − β . In the FIR/submm, and above 30 K, the MAC value at a given wavelength increases with the temperature as thermally activated absorption processes appear. The studied materials exhibit different and complex behaviors at long wavelengths (λ ≥ 200 to 700 μ m depending on the samples). These behaviors are attributed to the amorphous nature of dust and to the amount and nature of the defects within this amorphous structure. We do not observe MAC variations in the 10–30 K range. Above 20 μ m, the measured MAC are much higher than the MAC calculated from interstellar silicate dust models indicating that the analogues measured in this study are more emissive than the silicates in cosmic dust models. Conclusions. The underestimated value of the MAC deduced from cosmic dust models in the FIR/submm has important astrophysical implications because masses are overestimated by the models. Moreover, constraints on elemental abundance of heavy elements in cosmic dust models are relaxed.read more
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Planck 2018 results: XI. Polarized dust foregrounds
Yashar Akrami,Yashar Akrami,M. Ashdown,J. Aumont,Carlo Baccigalupi,Mario Ballardini,Mario Ballardini,A. J. Banday,A. J. Banday,R. B. Barreiro,Nicola Bartolo,Nicola Bartolo,Soumen Basak,K. Benabed,J.-P. Bernard,J.-P. Bernard,Marco Bersanelli,Marco Bersanelli,P. Bielewicz,P. Bielewicz,P. Bielewicz,J. R. Bond,Julian Borrill,Julian Borrill,François R. Bouchet,F. Boulanger,F. Boulanger,F. Boulanger,Andrea Bracco,Andrea Bracco,M. Bucher,M. Bucher,Carlo Burigana,Carlo Burigana,Erminia Calabrese,Jean-François Cardoso,Julien Carron,H. C. Chiang,H. C. Chiang,C. Combet,B. P. Crill,P. de Bernardis,G. de Zotti,G. de Zotti,Jacques Delabrouille,J.-M. Delouis,E. Di Valentino,Clive Dickinson,Jose M. Diego,A. Ducout,X. Dupac,George Efstathiou,Franz Elsner,Torsten A. Enßlin,Edith Falgarone,Yabebal Fantaye,Yabebal Fantaye,Katia Ferrière,Katia Ferrière,Fabio Finelli,Francesco Forastieri,M. Frailis,A. A. Fraisse,E. Franceschi,Andrei V. Frolov,S. Galeotta,S. Galli,K. Ganga,Ricardo Genova-Santos,Ricardo Genova-Santos,Tuhin Ghosh,Tuhin Ghosh,J. González-Nuevo,Krzysztof M. Gorski,Krzysztof M. Gorski,Alessandro Gruppuso,Jon E. Gudmundsson,Jon E. Gudmundsson,Vincent Guillet,Vincent Guillet,Will Handley,F. K. Hansen,D. Herranz,Zhiqi Huang,Andrew H. Jaffe,W. C. Jones,E. Keihänen,Reijo Keskitalo,K. Kiiveri,K. Kiiveri,J. B. Kim,Nicoletta Krachmalnicoff,Martin Kunz,Martin Kunz,Martin Kunz,Hannu Kurki-Suonio,Hannu Kurki-Suonio,J.-M. Lamarre,Anthony Lasenby,M. Le Jeune,François Levrier,Michele Liguori,Michele Liguori,P. B. Lilje,V. Lindholm,V. Lindholm,M. López-Caniego,Philip Lubin,Yin-Zhe Ma,Yin-Zhe Ma,J. F. Macías-Pérez,Gianmarco Maggio,Davide Maino,Davide Maino,N. Mandolesi,N. Mandolesi,A. Mangilli,Peter G. Martin,E. Martínez-González,Sabino Matarrese,Sabino Matarrese,Jason D. McEwen,Peter Meinhold,Alessandro Melchiorri,M. Migliaccio,M. Migliaccio,M.-A. Miville-Deschênes,M.-A. Miville-Deschênes,Diego Molinari,Diego Molinari,A. Moneti,L. Montier,L. Montier,Gianluca Morgante,Paolo Natoli,Paolo Natoli,L. Pagano,L. Pagano,D. Paoletti,Valeria Pettorino,F. Piacentini,G. Polenta,J.-L. Puget,J.-L. Puget,Jörg P. Rachen,M. Reinecke,Mathieu Remazeilles,A. Renzi,Graca Rocha,C. Rosset,G. Roudier,G. Roudier,G. Roudier,Jose Alberto Rubino-Martin,Jose Alberto Rubino-Martin,B. Ruiz-Granados,B. Ruiz-Granados,L. Salvati,M. Sandri,M. Savelainen,M. Savelainen,M. Savelainen,Douglas Scott,Juan D. Soler,Locke D. Spencer,J. A. Tauber,D. Tavagnacco,D. Tavagnacco,L. Toffolatti,L. Toffolatti,M. Tomasi,M. Tomasi,Tiziana Trombetti,J. Valiviita,J. Valiviita,F. Vansyngel,B. Van Tent,P. Vielva,Fabrizio Villa,Nicola Vittorio,Ingunn Kathrine Wehus,Ingunn Kathrine Wehus,Andrea Zacchei,Andrea Zonca +183 more
TL;DR: In this paper, a power-law fit to the angular power spectra of dust polarization at 353 GHz for six nested sky regions covering from 24 to 71 % of the sky is presented.
Journal ArticleDOI
The Disk Substructures at High Angular Resolution Project (DSHARP). V. Interpreting ALMA Maps of Protoplanetary Disks in Terms of a Dust Model
Tilman Birnstiel,Cornelis P. Dullemond,Zhaohuan Zhu,Sean M. Andrews,Xue-Ning Bai,David J. Wilner,John M. Carpenter,Jane Huang,Andrea Isella,Myriam Benisty,Myriam Benisty,Laura M. Pérez,Shangjia Zhang +12 more
TL;DR: The Disk Substructures at High Angular Resolution Project (DSHARP) is the largest homogeneous high-resolution (approximate to 0.'' 035, or similar to 5 au) disk continuum imaging survey with the Atacama Large Millimeter/submillimeter Array (ALMA) so far as discussed by the authors.
Journal ArticleDOI
The Disk Substructures at High Angular Resolution Project (DSHARP): V. Interpreting ALMA maps of protoplanetary disks in terms of a dust model
Tilman Birnstiel,Cornelis P. Dullemond,Zhaohuan Zhu,Sean M. Andrews,Xue-Ning Bai,David J. Wilner,John M. Carpenter,Jane Huang,Andrea Isella,Myriam Benisty,Myriam Benisty,Laura M. Pérez,Shangjia Zhang +12 more
TL;DR: The Disk Substructures at High Angular Resolution Project (DSHARP) is the largest homogeneous high-resolution disk continuum imaging survey with ALMA so far as mentioned in this paper, which has been used to study the dust growth and dynamics.
Journal ArticleDOI
Dust masses of young disks: constraining the initial solid reservoir for planet formation
Łukasz Tychoniec,Carlo F. Manara,Giovanni P. Rosotti,Ewine F. van Dishoeck,Ewine F. van Dishoeck,A. Cridland,Tien-Hao Hsieh,Nadia M. Murillo,Dominique Segura-Cox,Sierk van Terwisga,John J. Tobin +10 more
TL;DR: In this article, the authors used Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 (1.1-1.3 mm) continuum observations of embedded disks in the Perseus star-forming region together with Very Large Array (VLA) Ka -band (9 mm) data to provide a robust estimate of dust disk masses from the flux densities measured in the image plane.
Journal ArticleDOI
Dust models compatible with Planck intensity and polarization data in translucent lines of sight
Vincent Guillet,L. Fanciullo,Laurent Verstraete,Francois Boulanger,Anthony P. Jones,Marc-Antoine Miville-Deschênes,Nathalie Ysard,François Levrier,M. I. R. Alves +8 more
TL;DR: In this article, the spectral dependence of the mean extinction, polarized extinction, total and polarized spectral energy distributions (SEDs) with polycyclic aromatic hydrocarbons, astrosilicate and amorphous carbon (a-C) grains was fit.
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