SIMBAD references

2017MNRAS.466..546M - Mon. Not. R. Astron. Soc., 466, 546-555 (2017/March-3)

Gaia's view of the λ Boo star puzzle.


Abstract (from CDS):

The evolutionary status of the chemically peculiar class of λ Boo stars has been intensely debated. It is now agreed that the λ Boo phenomenon affects A stars of all ages, from star formation to the terminal age main sequence, but the cause of the chemical peculiarity is still a puzzle. We revisit the debate of their ages and temperatures in order to shed light on the phenomenon, using the new parallaxes in Gaia Data Release 1 with existing Hipparcos parallaxes and multicolour photometry. We find that no single formation mechanism is able to explain all the observations, and suggest that there are multiple channels producing λ Boo spectra. The relative importance of these channels varies with age, temperature and environment.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - asteroseismology - stars: chemically peculiar - circumstellar matter - stars: distances - ISM: clouds - ISM: clouds

VizieR on-line data: <Available at CDS (J/MNRAS/466/546): table1.dat>

Simbad objects: 173

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