V994 Herculis: the multiple system with a quadruple-lined spectrum and a double eclipsing feature

Details V994 Herculis: the multiple system with a quadruple-lined spectrum and a double eclipsing feature V994 Herculis: the multiple system with a quadruple-lined spectrum and a double eclipsing feature

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.389.1630l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 389, Issue 4, pp. 1630-1636.

Astronomy and Astrophysics

Astronomy

4

Binaries: Close, Stars: Fundamental Parameters, Stars: Individual: V994 Herculis

Scientific paper

We report the discovery of a multiple system with a quadruple-lined spectrum and a double eclipsing feature. Our photometric and high-resolution spectroscopic data show that V994 Herculis (V994 Her; ADS 11373 AB) is composed of two pairs of double-lined eclipsing binaries, which we designate as A and B. System A consists of a B8V+A0V binary with an orbital period of 2.083264 d and system B of a A2V+A4V binary with 1.420033 d. Our light curves show that both of them have a detached binary configuration. We derive masses and radii of four components (Aa, Ab, Ba and Bb) from the synthetic analyses of light curves and radial velocity curves. The masses of systems A and B are MAa = 2.83 +/- 0.20 Msolar, MAb = 2.30 +/- 0.16 Msolar, MBa = 1.87 +/- 0.12 Msolar and MBb = 1.86 +/- 0.12 Msolar, with radii RAa = 2.15 +/- 0.05 Rsolar, RAb = 1.71 +/- 0.04 Rsolar, RBa = 1.59 +/- 0.08 Rsolar and RBb = 1.50 +/- 0.08 Rsolar, respectively. These masses and radii are well consistent with the empirical relation for double-lined eclipsing binaries.

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