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Multiple Close Frequences of the δ Scuti Star θ2Tau: The Second Multisite Campaign

Published online by Cambridge University Press:  12 April 2016

M. Breger ,
R. Garrido ,
Huang Lin ,
Jiang Shi-yang ,
Guo Zi-he ,
M. Frueh  and
M. Paparo
M. Breger
Affiliation:
McDonald Observatory, University of Texas, Austin, Texas, USA and Institut für Astronomie, Universität Wien, Wien, Austria
R. Garrido
Affiliation:
Instituto de Astrofisica de Andalucia, Granada, Spain
Huang Lin
Affiliation:
Beijing Observatory, Academy of Sciences, Beijing, China
Jiang Shi-yang
Affiliation:
Beijing Observatory, Academy of Sciences, Beijing, China
Guo Zi-he
Affiliation:
Beijing Observatory, Academy of Sciences, Beijing, China
M. Frueh
Affiliation:
McDonald Observatory, University of Texas, Austin, Texas
M. Paparo
Affiliation:
Konkoly Observatory, Budapest, Hungary

Abstract

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Multisite photoelectric b and V photometry of the δ Scuti variable θ2(78) Tau has been obtained on three continents. Five close pulsation frequencies (13.22965, 13.48073, 13.69360, 14.31764 and 14.61454 cycles per day) with visual amplitudes between 0.001 and 0.007 mag were found. The four frequencies found in the previous campaign were confirmed. All three main data sets (1982-1986) are in excellent agreement with each other and fit the solution to ±0.0028 mag per single measurement. Over the four years the amplitudes and frequencies of pulsation were constant.

Type
4. Abstracts of Poster Papers
Information
International Astronomical Union Colloquium , Volume 111: The Use of Pulsating Stars in Fundamental Problems of Astronomy , 1989 , pp. 251
Copyright
Copyright © Cambridge University Press 1989