• Michael BREGER (Ed.)

Communications in Asteroseismology Volume 162, 2011

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Die Serie Communications in Asteroseismology (CoAst) stellt eine international gefragte Plattform für wissenschaftliche Publikationen der neuesten Forschungsergebnisse auf dem Gebiet der Asteroseismologie dar. Forschungsgegenstand der Asteroseismologie sind veränderliche und pulsierende Sterne. Neben den halbjährlich erscheinenden regulären Ausgaben mit Beiträgen aus der laufenden Forschung werden auch Sonderausgaben für Konferenzberichte bzw. Programmhandbücher herausgegeben.

Contents

Analyses of Crawford’s uvby ß calibrations using the pulsational variations of FG Vir by P.Haas
A spectroscopic study of the hybrid pulsator γ Pegasi by C. P. Pandey, T.Morel, M. Briquet, et al.
Frequency analysis of five short periodic pulsators by A. Liakos, P.Niarchos
Update and Additional Frequencies for Kepler Star KIC 970032 by Joyce A. Guzik, Michel Breger
New pulsation analysis of the oscillating Eclipsing Binary BG Peg by A. Liakos, P.Niarchos

…

The publication series of Communications in Asteroseismology (CoAst) is one of the most important international journals in the field of asteroseismology. Asteroseismology is the science of variable and pulsating stars. Every six months CoAst publishes a newsletter with papers on ongoing research projects. Besides these regular issues, special issues such as conference proceedings or program manuals are published in this series.



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Communications in Asteroseismology Volume 162, 2011


ISBN 978-3-7001-7154-6
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ISBN 978-3-7001-7223-9
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Verlag der Österreichischen Akademie der Wissenschaften
Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2,
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400
https://verlag.oeaw.ac.at, e-mail: bestellung.verlag@oeaw.ac.at
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Analyses of Crawford’s uvby β calibrations using the pulsational variations of FG Vir

    P. Haas

Communications in Asteroseismology 162, pp. 3-20, 2011/11/30

doi: 10.1553/cia162s3

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doi:10.1553/cia162



doi:10.1553/cia162s3


Abstract

Crawford’s uvby ß calibration method is examined for A-type stars by comparing it with the pulsational variations of the observable m1, c1 and MV for the δ Scuti star FG Vir. The fit between the calibration values of m1 and MV and the respective measurements for FG Vir are tested as a function of temperature based on 3068 4-colour values taken at the Observatorio de Sierra Nevada in Spain during the years 2002 and 2003. Testing is performed by means of linear regression. The fit between the measured index m1 of FG Vir and the m1 index of the Hyades is nearly perfect. A fit between the calibration value MV and the measured values of FG Vir cannot be obtained with Crawford’s calibration procedure in a straightforward manner. In order to achieve an optimal fit for MV two modifications of the calibration procedure are investigated and discussed. (i) the position of the ZAMS given by Crawford is replaced by the position of the ZAMS given by Mermilliod; (ii) the influence of the mass difference on c1 is taken into account.

Published Online: 2011/11/30 13:04:00

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