The evolution stage and massive disc of the interacting binary V393 Scorpii

Details The evolution stage and massive disc of the interacting binary V393 Scorpii The evolution stage and massive disc of the interacting binary V393 Scorpii

2011-12-12

arxiv.org/abs/1112.2668v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

10 pages, 5 tables, 6 figures, accepted for publication in MNRAS main journal

Scientific paper

V393 Scorpii is a bright Galactic Double Periodic Variable showing a long photometric cycle of approx. 253 days. We present new VIJK photometric time series for V393 Scorpii along with the analysis of ASAS V-band photometry. We disentangled all light curves into the orbital and long cycle components. The ASAS V-band orbital light curve was modeled with two stellar components plus a circumprimary optically thick disc assuming a semidetached configuration. We present the results of this calculation, giving physical parameters for the stars and the disc, along with general system dimensions. Our results are in close agreement with those previously found by Mennickent et al. (2010) from IR spectroscopy and the modeling of the spectral energy distribution. The stability of the orbital light curve suggests that the stellar + disc configuration remains stable during the long cycle. Therefore, the long cycle should be produced by an additional variable and not-eclipsed emitting structure. We discuss the evolutionary stage of the system finding the best match with one of the evolutionary models of van Rensbergen et al. (2008). According to these models, the system is found to be after an episode of fast mass exchange that transferred 4 M_sun from the donor to the gainer in a period of 400.000 years. We argue that a significant fraction of this mass has not been accreted by the gainer but remains in an optically thick massive (about 2 M_sun) disc-like surrounding pseudo-photosphere whose luminosity is not driven by viscosity but probably by reprocessed stellar radiation. Finally, we provide the result of our search for Galactic Double Periodic Variables and briefly discuss the outliers beta Lyr and RX Cas.

Affiliated with

Also associated with

No associations

Rating

The evolution stage and massive disc of the interacting binary V393 Scorpii does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The evolution stage and massive disc of the interacting binary V393 Scorpii, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The evolution stage and massive disc of the interacting binary V393 Scorpii will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-709523