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Title:
The spectroscopic binary Scorpius X-1
Authors:
Cowley, A. P.; Crampton, D.
Publication:
Astrophysical Journal, vol. 201, Oct. 15, 1975, pt. 2, p. L65-L68. NSF-supported research. (ApJL Homepage)
Publication Date:
10/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL SPECTROSCOPY, BINARY STARS, STELLAR EVOLUTION, X RAY STARS, EMISSION SPECTRA, HYDROGEN CLOUDS, LINE SPECTRA, ORBITAL ELEMENTS, RADIAL VELOCITY, X RAY SOURCES
Comment:
A&AA ID. AAA014.142.115
DOI:
10.1086/181943
Bibliographic Code:
1975ApJ...201L..65C

Abstract

Recent spectroscopic observations of Sco X-1 show conclusively that orbital velocity variations of about 0.787 days and a range of about 120 km per sec are present in both the He II and H emission lines. The most probable masses are less than 2 solar masses for each star. It is suggested that the nondegenerate companion is somewhat evolved from the main sequence.

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