The double-lined spectroscopic binary IOTA Pegasi

Details The double-lined spectroscopic binary IOTA Pegasi The double-lined spectroscopic binary IOTA Pegasi

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95.1000f&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Dec. 1983, p. 1000-1005.

Astronomy and Astrophysics

Astronomy

20

Binary Stars, Orbital Elements, Stellar Motions, Stellar Spectra, Angular Velocity, Circular Orbits, Stellar Mass, Stellar Rotation

Scientific paper

Low-noise Reticon observations of ι Peg at 6430 Å reveal weak, well-defined lines of the secondary. The authors have determined the secondary velocity curve for the first time and have redetermined the primary velocity curve. The orbit is circular with KA = 48.1±0.2 km s-1 and KB = 77.9±0.3 km s-1 and corresponding minimum masses of 1.31±0.02 M_sun; and 0.81±0.01 M_sun; for components A and B, respectively. The spectral type of the secondary is estimated to be G8 V. The 6707 Å Li I line is measured in both the primary and secondary. The line is unusually strong in the secondary indicating that the system is very young.

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