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Time-Resolved Spectral Analysis of the Pulsating Helium Star V 652 Her

Published online by Cambridge University Press:  12 April 2016

C.S. Jeffery ,
V.M. Woolf  and
D.L. Pollacco
C.S. Jeffery
Affiliation:
Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland
V.M. Woolf
Affiliation:
Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland
D.L. Pollacco
Affiliation:
School of Physical Sciences, Queen’s University Belfast, Belfast BT7 9NN, N. Ireland

Abstract

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We present a summary of a new time-dependent Spectroscopic analysis of the pulsating helium star V652 Her. The instantaneous properties of the star (effective temperature, surface gravity, radial displacement, etc.) are evaluated throughout the pulsation cycle. The data are used to establish measurements of the mean stellar radius and mass more accurately than hitherto. The first direct evidence of a supersonic shock at minimum radius is also obtained.

Type
Part 3. Nonlinear Effects in Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 442 - 443
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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