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Spectroscopic Observations of The Be Star PHI-PER

Published online by Cambridge University Press:  12 April 2016

Mahendra Singh ,
Masahiro Mon ,
Tomokazu Kogure  and
Masakazu Suzuki
Mahendra Singh
Affiliation:
Uttar Pradesh State Observatory Manora Peak Naini Tal- 263 129, India
Masahiro Mon
Affiliation:
Department of Astronomy, Faculty of ScienceKyoto UniversitySakyo-Ku Kyoto 606, Japan
Tomokazu Kogure
Affiliation:
Department of Astronomy, Faculty of ScienceKyoto UniversitySakyo-Ku Kyoto 606, Japan
Masakazu Suzuki
Affiliation:
Kanazawa Institute of TechnologyP.O. Kanazawa-South, Ishikawa 921 Kanazava, Japan

Abstract

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Based on a series of high dispersion Coude spectra taken with 188-cm telescope of Okayama Astrophysical Observatory over an extensive period of time (nearly 20 years), spectroscopic behaviours were measured and discussed. Synchronous variations of V/R (intensity ratio of violet to red emission peaksjvariability with the radial velocity curves (RV) for Balmer and Hel 3888 shell absorption lines were confirmed. Using the peak separations of the Balmer emission lines, envelope extension was also estimated. Main difficulty was found in explaining the envelope extension of the primary star of the system which overflows the Roche-lobe limit when we consider the binary nature of the system.

Type
XI. Supplement
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 804 - 806
Copyright
Copyright © Astronomical Society of the Pacific 1993

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