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A study of the H-alpha line in X1735 - 444Forty six optical spectra containing the H-alpha line of X1735 - 444, which were obtained over three nights in May 1987, were analyzed. Using a convolution method, a radial velocity curve was derived for the whole H-alpha line. Combining the spectroscopic results with an updated photometric ephemeris, the probable sites for H-alpha emission in X1735 - 444 were determined. Results of the analyses suggest that two distinct regions contribute to the observed profile in X-1735 - 444: (1) the peak emission, which is associated with the accretion stream of material passing between the companion and the compact object; and (2) the base emission, which is produced symmetrically in the outer accretion disk.
Document ID
19920035439
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Smale, Alan P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Corbet, Robin H. D.
(Pennsylvania State University University Park, United States)
Date Acquired
August 15, 2013
Publication Date
December 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 383
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A18063
Distribution Limits
Public
Copyright
Other

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