BD -3 deg 2525 - A spectroscopic binary subdwarf

Details BD -3 deg 2525 - A spectroscopic binary subdwarf BD -3 deg 2525 - A spectroscopic binary subdwarf

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...304..721g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 304, May 15, 1986, p. 721-727. USAF-supported research.

Astronomy and Astrophysics

Astrophysics

11

Binary Stars, Line Spectra, Stellar Spectrophotometry, Subdwarf Stars, Eccentric Orbits, Main Sequence Stars, Orbital Elements, Radial Velocity, Spectral Energy Distribution, White Dwarf Stars

Scientific paper

As a result of a Palomar radial velocity program of high-velocity stars, the sdG star BD -3°2525 was found to be a single-lined spectroscopic binary. The period is 113 days; the semiamplitude is small, 14.4 km s-1, and the eccentricity is large, e = 0.5. The authors place limits on the brightness, nature, and mass of the invisible secondary from multichannel spectrophotometry and from the orbit. A brief discussion of the frequency of binaries in population II suggests that close binaries are rare. The pair in BD -3°2525 is relatively wide and noninteracting.

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