SIMBAD references

2012MNRAS.427.1418M - Mon. Not. R. Astron. Soc., 427, 1418-1428 (2012/December-1)

Pulsational amplitude growth of the star KIC 3429637 (HD 178875) in the context of Am and ρPup stars.

MURPHY S.J., GRIGAHCENE A., NIEMCZURA E., KURTZ D.W. and UYTTERHOEVEN K.

Abstract (from CDS):

KIC3429637 (HD178875) is a δSct star whose light curve shows continuous pulsational amplitude growth in Kepler mission photometry. Analysis of the three largest amplitude peaks in the Fourier transform indicates different growth rates for all three. We have ruled out instrumental causes, and determine the amplitude growth to be intrinsic to the star. We calculate time-dependent convection models and compare them with the observations. We confirm earlier characterizations that KIC3429637 is a marginal Am star through the analysis of new spectroscopic data. With the data presently available, a plausible cause of the amplitude growth is increasing pulsational driving as evolutionary changes shift the HeII driving zone deeper in this ρPuppis star. If this model is correct, then we are watching real-time stellar evolutionary changes.

Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS

Journal keyword(s): stars: chemically peculiar - stars: individual: HD178875 - stars: oscillations - stars: variables: δScuti

Simbad objects: 7

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2019.12.11-10:11:57

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