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Optical Spectroscopy of V393 Scorpii During its Long Cycle

Published online by Cambridge University Press:  23 April 2012

Ronald E. Mennickent
Affiliation:
Departamento de Astronomía, U. de Concepción, Casilla 160-C, Concepción, Chile
Zbigniew Kołaczkowski
Affiliation:
Instytut Astronomiczny Uniwersytetu Wrocławskiego, Wrocław, Poland
Gojko Djurasevic
Affiliation:
Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia
M. Diaz
Affiliation:
Departamento de Astronomia, IAG, U. de Sao Paulo, Rua do Matao, 1226, Butanta 05508-900, Sao Paulo, SP, Brasil
Ewa Niemczura
Affiliation:
Instytut Astronomiczny Uniwersytetu Wrocławskiego, Wrocław, Poland
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Abstract

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V393 Scorpii is a bright Galactic Double Periodic Variable showing a long photometric cycle of ≈253 days. The ASAS V-band light curve has been disentangled into an orbital and long cycle component. The orbital light curve was modeled with two stellar components and a circumprimary accretion disk. Based on this model, and the careful choice of a template spectrum for the donor, the contribution of the donor to the line+continuum spectrum was removed at every orbital phase. The remaining residual spectra were analyzed. Notable findings are the larger line emissivity observed during the long cycle maximum that is concentrated to low velocities and the presence of discrete absorption components in the wings of the OI 7773 line, whose visibility strongly depends on the orbital phase. In addition, weak emission is observed in donor metallic absorption lines. Finally, we present the first Hα Doppler map for V 393 Scorpii. A modulated wind explains many observational features.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2012

References

Mennickent, R. E., Pietrzynski, G., Diaz, M., & Gieren, W. 2003, A&A 399, L47Google Scholar
Mennickent, R. E., Kołaczkowski, Z., Graczyk, D., & Ojeda, B. 2010, MNRAS 405, 1947Google Scholar