The RS Canum Venaticorum system BD + 61 deg 1211 = 2A 1052 + 606

Details The RS Canum Venaticorum system BD + 61 deg 1211 = 2A 1052 + 606 The RS Canum Venaticorum system BD + 61 deg 1211 = 2A 1052 + 606

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..993c&link_type=abstract

Astrophysical Journal, Part 1, vol. 234, Dec. 15, 1979, p. 993-996.

Astronomy and Astrophysics

Astrophysics

16

Binary Stars, Stellar Spectrophotometry, X Ray Sources, Radial Velocity, Stellar Motions, X Ray Stars

Scientific paper

Spectroscopic observations of BD + 61 deg 1211, which is associated with the weak variable X-ray source 2A 1052 + 606, show that it is a single-lined binary of the RS Canum Venaticorum type with variable H(alpha) and Ca II emission reversals. The period is 7.492 + or - 0.0009 days and the semi-amplitude of the velocity curve is 28 + or 2 km/s. The mass function is 0.016 solar mass. This is the first member of the RS Canum Venaticorum class to be recognized via its X-ray emission, and the second such object to emit both hard (1-3 A) and soft (greater than 10 A) X-rays.

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