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P. G. Ostrov

Publications and source records attributed to P. G. Ostrov.

2 recordsLinked to original sources
arXiv2000

Orbital solution for the MACHO*05:34:41.3 -69:31:39 O3 If*+O6:V eclipsing binary system in the LMC

An orbital solution to the MACHO*05:34:41.3 -69:31:39 eclipsing binary system is presented, based on the published light curve and spectral data obtained with the 2.15-m telescope at CASLEO. Based on these spectroscopic observations, this system's binary components were classified as O3 If* and O6:V respectively. The radial velocity data alongwith the published light curve were analysed with the Wilson-Devinney code to derive the following masses and radii for the components of this system: M1 = 41 +- 1.2, R1 = 9.6 +- 0.02, M2 = 27 +- 1.2 and R2 = 8.0 +- 0.05, in solar units. The solution shows that the system is in over-contact as one would expect from the derived masses and the very short orbital period (~1.4 days).

astro-ph↗
arXiv2000

Determination of Masses and Radii of the Massive Eclipsing Binary System HV 2543 in the Large Magellanic Cloud

We present a V light curve of the eclipsing binary system HV 2543 (Sk-67 117) in the Large Magellanic Cloud based on CCD images acquired between the years 1995 and 1998. We have analysed this light curve and published radial velocity data, finding that this system is semidetached, with the secondary (less massive and less luminous component) filling its Roche lobe. From our analysis with the Wilson-Devinney code, we estimated the following masses and radii for the components of HV 2543: M1=25.63 +- 0.7, R1=15.54 +- 0.4, M2=15.63 +- 1.0 and R2=13.99 +- 0.4, in solar units. On the basis of B and V photometry of the field stars, we found that HV 2543 is member of an OB association, perhaps related to which the massive binary system Sk-67 105 belongs.

astro-ph↗