Spectroscopy of the rapidly rotating K star HD 36705

Details Spectroscopy of the rapidly rotating K star HD 36705 Spectroscopy of the rapidly rotating K star HD 36705

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320..850v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 15, 1987, p. 850-861. Research supported by the Naturvetenskapli

Astronomy and Astrophysics

Astrophysics

59

Astronomical Spectroscopy, K Stars, Late Stars, Pre-Main Sequence Stars, Stellar Rotation, Abundance, Atmospheric Models, Emission Spectra, H Alpha Line, Lithium, Stellar Composition, X Ray Sources

Scientific paper

Spectroscopic observations of HD 36705 are reported. Values of 100 + or - 5 km/s and 29 + or - 2 km/s are derived for the v sin i and radial velocity, respectively. The central wavelength of the broad H-alpha emission varies as a function of rotation phase with an amplitude of 16 km/s and with the maximum redshift at the photometric minimum. Using new photometry, the effective temperature of the star is estimated to be 5000 + or - 100 K. An overall metal abundance (M/H) = 0.1 + or - 0.2 is derived from Al I, Ca I, Fe I, and Ni I lines. It is proposed that HD 36705 is a contracting star with a mass of one to two solar masses and an age of a million to thirty million years.

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