SIMBAD references

2017MNRAS.468L..55M - Mon. Not. R. Astron. Soc., 468, L55-L58 (2017/June-2)

Unusually high circumstellar absorption variability around the δ Scuti /λ Bootis star HD 183324.

MONTGOMERY S.L. and WELSH B.Y.

Abstract (from CDS):

We present both archival and new high-spectral resolution visible observations of the δ Scuti/λ Bootis star HD 183324 recorded over the 2009-2013 timeframe. Previous observations of this A0V-type star have hinted at the presence of a circumstellar disc of gas surrounding the star. These new spectral data unequivocally show a remarkably high level of variable absorption activity, whose behaviour is typical of a stellar system in which gas is added to a circumstellar disc on a sporadic basis due to the evaporation of planetesimal-like objects (i.e. 'exocomets'). This planetesimal material most probably resides in an IR-emitting debris disc of dust and gas, similar to that of the β Pictoris exoplanet system that has recently been shown to harbor an exoplanet.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): circumstellar matter - stars: individual: HD 183324 - stars: individual: HD 183324

Simbad objects: 4

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