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Cambridge University Press, Proceedings of the International Astronomical Union, S343(14), p. 181-185, 2018

DOI: 10.1017/s1743921318005720

Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/sty1422

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Extended Dust Emission from Nearby Evolved Stars★

Journal article published in 2018 by Thavisha E. Dharmawardena, Francisca Kemper ORCID, Peter Scicluna, Jan G. A. Wouterloot, Alfonso Trejo ORCID, Sundar Srinivasan, Jan Cami, Albert Zijlstra, Jonathan P. Marshall ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

AbstractWe derive azimuthally-averaged surface-brightness profiles of 16 AGB stars in the far-IR and sub-mm with the aim of studying the resolved historic mass loss in the extended circumstellar envelope. The PSF-subtracted extended component fluxes were found to be ∼40% of the total source flux. By fitting SEDs at each radial point we derive the dust temperature, column density and spectral index of emissivity via Bayesian inference. The measured dust-to-gas ratios were somewhat consistent with canonical values however with a large scatter.