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Title:
The double-lined spectroscopic binary IOTA Pegasi
Authors:
Fekel, F. C.; Tomkin, J.
Affiliation:
AA(NASA, Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, Greenbelt, MD; Texas, University, Austin, TX), AB(Texas, University, Austin, TX)
Publication:
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Dec. 1983, p. 1000-1005. (PASP Homepage)
Publication Date:
12/1983
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
BINARY STARS, ORBITAL ELEMENTS, STELLAR MOTIONS, STELLAR SPECTRA, ANGULAR VELOCITY, CIRCULAR ORBITS, STELLAR MASS, STELLAR ROTATION
DOI:
10.1086/131281
Bibliographic Code:
1983PASP...95.1000F

Abstract

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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