SIMBAD references

2018ApJ...869...22T - Astrophys. J., 869, 22-22 (2018/December-2)

Quest for the donor star in the magnetic precataclysmic variable V1082 Sgr.

TOVMASSIAN G., GONZALEZ J.F., HERNANDEZ M.-S., GONZALEZ-BUITRAGO D., ZHARIKOV S. and HERNANDEZ SANTISTEBAN J.V.

Abstract (from CDS):

We obtained high-resolution spectra and multicolor photometry of V1082 Sgr to study the donor star in this 20.8 hr orbital period binary, which is assumed to be a detached system. We measured the rotational velocity (vsini=26.5±2.0 km s–1), which, coupled with the constraints on the white dwarf mass from the X-ray spectroscopy, leads to the conclusion that the donor star barely fills 70% of its corresponding Roche lobe radius. It appears to be a slightly evolved K2-type star. This conclusion was further supported by a recently published distance to the binary system measured by the Gaia mission. At the same time, it becomes difficult to explain a very high (>10–9 Myr–1) mass transfer and mass accretion rate in a detached binary via stellar wind and magnetic coupling.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - novae, cataclysmic variables - stars: individual: V1082 Sgr - star: rotation - stars: winds, outflows

Simbad objects: 16

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2019.10.22-14:32:03

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