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Tomography of the Atmosphere of the Mira Variable Z Oph1

Published online by Cambridge University Press:  12 April 2016

A. Jorissen ,
M. Dedecker ,
B. Plez ,
R. Alvarez ,
D. Gillet  and
A.B. Fokin
A. Jorissen*
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, Belgium
M. Dedecker
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, Belgium
B. Plez
Affiliation:
GRAAL, Université de Montpellier II, France
R. Alvarez
Affiliation:
Observatoire Royal de Belgique
D. Gillet
Affiliation:
Observatoire de Haute Provence, France
A.B. Fokin
Affiliation:
Institute for Astronomy of the Russia Academy of Sciences, Moscow, Russia
*
2 Research Associate, Fonds National de la Recherche Scientifique, Belgium; e-mail: ajorisse@astro.ulb.ac.be

Abstract

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The new tomographic technique devised by Alvarez et al. (2000) to explore the velocity field across the atmosphere of long-period variable stars (LPVs) is applied to the Mira variable Z Oph. The method cross-correlates the optical spectrum with numerical masks constructed from synthetic spectra and probing layers of increasing depths. This technique reveals that the line doubling often observed in LPVs around maximum light is the signature of the shock wave propagating in the atmosphere of these pulsating stars.

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. 428 - 431
Copyright
Copyright © Astronomical Society of the Pacific 2002

Footnotes

3

Boursier F.R.I.A., Belgium

1

Based on observations made at Observatoire de Haute Provence, operated by the Centre National de la Recherche Scientifique, France

References

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