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Non-Adiabatic Quantities in δ Scuti and γ Dor Stars: a Comparison between Observations and Theoretical Non-Adiabatic Models

Published online by Cambridge University Press:  12 April 2016

R. Garrido ,
A. Moya  and
A. Claret
R. Garrido*
Affiliation:
Instituto de Astrofisica de Andalucia, CSIC, Apdo 3004, 18080, Granada, Spain
A. Moya
Affiliation:
Instituto de Astrofisica de Andalucia, CSIC, Apdo 3004, 18080, Granada, Spain
A. Claret
Affiliation:
Instituto de Astrofisica de Andalucia, CSIC, Apdo 3004, 18080, Granada, Spain
*
1 e-mail: [email protected]

Abstract

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Phase lag, ψT and R, a parameter measuring the departure from adiabaticity, can be derived directly from multicolor photometry. The same quantities can also be calculated from theoretical non-adiabatic pulsation models. We present here some preliminary theoretical results which indicate that these quantities depend on the mixing length parameter used to treat convection in the standard ML theory. The comparison favours models with α values between 1 and 1.5Hp. Non-adiabatic models also predict the observed phase lags for the newly discovered α Dor g-mode pulsating stars.

Type
Part 2.4. Delta Scuti Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 319 - 321
Copyright
Copyright © Astronomical Society of the Pacific 2002

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