A pre-main sequence star in the detached binary EK Cephei

Details A pre-main sequence star in the detached binary EK Cephei A pre-main sequence star in the detached binary EK Cephei

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313l..81p&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 313, Feb. 15, 1987, p. L81-L83. NSF-supported resea

Astronomy and Astrophysics

Astrophysics

57

Binary Stars, Cepheid Variables, Pre-Main Sequence Stars, Eclipsing Binary Stars, Radii, Stellar Gravitation, Stellar Mass, Stellar Radiation, Stellar Temperature

Scientific paper

The more massive star in the detached eclipsing binary, EK Cep, is an unevolved early A star. The properties of its companion of mass 1.1 M_sun; - lower surface gravity than that of the A star, temperature lower than that of main-sequence stars of the same mass, excess radiation in the blue band - have a rational explanation if this secondary component is in a state of pre-main-sequence contraction. The object appears to be unique among stars with directly determined masses.

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