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Optical spectroscopy of DPVs and the case of LP Ara

Published online by Cambridge University Press:  12 July 2011

Ronald E. Mennickent ,
Darek Graczyk ,
Zbigniew Kołaczkowski ,
Gabriela Michalska ,
Daniela Barría  and
Ewa Niemczura
Ronald E. Mennickent
Affiliation:
Dpto. de Astronomía, Universidad de Concepción, Chile
Darek Graczyk
Affiliation:
Dpto. de Astronomía, Universidad de Concepción, Chile
Zbigniew Kołaczkowski
Affiliation:
Instytut Astronomiczny Uniwersytetu Wrocławskiego, Wrocław, Poland
Gabriela Michalska
Affiliation:
Instytut Astronomiczny Uniwersytetu Wrocławskiego, Wrocław, Poland
Daniela Barría
Affiliation:
Dpto. de Astronomía, Universidad de Concepción, Chile
Ewa Niemczura
Affiliation:
Instytut Astronomiczny Uniwersytetu Wrocławskiego, Wrocław, Poland
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Abstract

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We present preliminary results of our spectroscopic campaign of a group of intermediate mass interacting binaries dubbed “Double Periodic Variables” (DPVs), characterized by orbital light curves and additional long photometric cycles recurring roughly after 33 orbital periods (Mennickent et al. 2003, 2005). They have been interpreted as interacting, semi-detached binaries showing cycles of mass loss into the interstellar medium (Mennickent et al. 2008, Mennickent & Kołaczkowski 2009). High resolution Balmer and helium line profiles of DPVs can be interpreted in terms of mass flows in these systems. A system solution is given for LP Ara, based on modeling of the ASAS V-band orbital light curve and the radial velocity of the donor star.

Keywords

stars: binariesstars: early-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 527 - 528
Copyright
Copyright © International Astronomical Union 2011

References

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