SIMBAD references

2018MNRAS.476.4418J - Mon. Not. R. Astron. Soc., 476, 4418-4434 (2018/June-1)

Stellar photospheric abundances as a probe of discs and planets.

JERMYN A.S. and KAMA M.

Abstract (from CDS):

Protoplanetary discs, debris discs, and disrupted or evaporating planets can all feed accretion on to stars. The photospheric abundances of such stars may then reveal the composition of the accreted material. This is especially likely in B to mid-F type stars, which have radiative envelopes and hence less bulk-photosphere mixing. We present a theoretical framework (CAM), considering diffusion, rotation, and other stellar mixing mechanisms to describe how the accreted material interacts with the bulk of the star. This allows the abundance pattern of the circumstellar material to be calculated from measured stellar abundances and parameters (vrot, Teff). We discuss the λ Bootis phenomenon and the application of CAM on stars hosting protoplanetary discs (HD 100546, HD 163296), debris discs (HD 141569, HD 21997), and evaporating planets (HD 195689/KELT-9).

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): planets and satellites: composition - protoplanetary discs - stars: abundances - stars: atmospheres - stars: chemically peculiar - circumstellar matter

Simbad objects: 28

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2019.10.16-20:20:56

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