Spectroscopy of V711 Tauri (= HR 1099) - Fundamental properties and evidence for starspots

Details Spectroscopy of V711 Tauri (= HR 1099) - Fundamental properties and evidence for starspots Spectroscopy of V711 Tauri (= HR 1099) - Fundamental properties and evidence for starspots

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268..274f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 1, 1983, p. 274-281. NASA-supported research.

Astronomy and Astrophysics

Astrophysics

104

Binary Stars, Orbital Elements, Starspots, Stellar Rotation, Stellar Spectra, Variable Stars, Absorption Spectra, Angular Velocity, H Lines, K Lines, Radial Velocity, Spectral Line Width, Stellar Evolution, Stellar Magnitude, Stellar Mass

Scientific paper

New orbital elements have been determined for the bright RS CVn-type system V711 Tau. The spectroscopic period has been refined to 2.83774 d + or - 0.00001 d. The eccentricity is determined to be 0.014 + or - 0.009, and the inclination of the system is 33 deg + or - 2 deg. The masses, radii, and equatorial rotational velocities for each component are stated.Evolutionary models suggest that mass transfer may begin in 70 to 80 million years. High SNR Reticon observations at red wavelengths show substantial differences in rotational velocity and line strength between the two components, as well as asymmetries in all absorption lines of the more massive, active, cooler star. These asymmetries are correlated with photometric variations and move across the line profiles with time. They are the result of starspot regions rotating in and out of view.

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