Measurements and study of rotational velocities in RS CVn star systems

Details Measurements and study of rotational velocities in RS CVn star systems Measurements and study of rotational velocities in RS CVn star systems

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...172...74h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 172, no. 1-2, Jan. 1987, p. 74-78.

Astronomy and Astrophysics

Astrophysics

36

Angular Velocity, Binary Stars, Stellar Rotation, Stellar Spectrophotometry, Velocity Measurement, Data Reduction, Line Spectra, Signal To Noise Ratios

Scientific paper

High signal-to-noise spectral observations were obtained in the red region using the coudé Reticon attached to the 2.1-m reflector at McDonald Observatory from September to December, 1984. Three lines, Fe I 6663 Å, Fe I 6678 Å, and Ca I 6718 Å, were chosen to determine the rotations of 75 components in 59 RS CVn star systems. Most of the RS CVn systems showed synchronized rotation, although apparently non-synchronous rotation was detected in several systems among all period groups. HD 8357, a very active system, appears to have a very low rotational velocity.

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