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Modelling gas and dust around carbon stars in the Large Magellanic Cloud

Published online by Cambridge University Press:  30 December 2019

Sundar Srinivasan Open the ORCID record for Sundar Srinivasan [Opens in a new window] ,
I.-K. Chen ,
P. Scicluna ,
J. Cami Open the ORCID record for J. Cami [Opens in a new window]  and
F. Kemper
Sundar Srinivasan
Affiliation:
Academia Sinica Institute of Astronomy & Astrophysics (ASIAA) 11F Astronomy-Mathematics Building, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
I.-K. Chen
Affiliation:
College of Arts & Sciences, Cornell University, KG17 Klarman Hall, Ithaca, NY 14853, USA
P. Scicluna
Affiliation:
Academia Sinica Institute of Astronomy & Astrophysics (ASIAA) 11F Astronomy-Mathematics Building, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
J. Cami
Affiliation:
Department of Physics & Astronomy, The University of Western Ontario, London, ON N6A 3K7, Canada email: s.srinivasan@irya.unam.mx
F. Kemper
Affiliation:
Academia Sinica Institute of Astronomy & Astrophysics (ASIAA) 11F Astronomy-Mathematics Building, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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Abstract

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In order to investigate the effect of dust production on the molecular absorption, we model the dust continuum and the 7.5 and 13.7 μm acetylene absorption features in the Spitzer IRS spectra of 148 carbon stars in the Large Magellanic Cloud (LMC). Our preliminary investigation does not find a strong correlation between the dust-production rate and the column density of acetylene for the LMC sample. However, we will construct more models at high optical depths and probe a larger range of dust properties for more robust results.

Keywords

stars: AGB and post-AGBstars: mass loss(stars:) circumstellar matterradiative transfer
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 504 - 505
Copyright
© International Astronomical Union 2019 

Footnotes

†

Present address: Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autonóma de México, Antigua Carretera a Pátzcuaro #8701, Ex-Hda. San José de La Huerta, Morelia, Michoacán, 58089, México.

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