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The bizarre spectrum of SS 433Results are reported for extensive spectrophotometric observations, over the wavelength range from 3800 to 7800 A, of the peculiar 14th-mag emission-line object Stephenson-Sanduleak (SS) 433, which has been identified with a variable nonthermal radio source and is positionally coincident with the X-ray source A1909+04. It is found that the spectrum is dominated by intense variable Balmer and He I emission, that three of the He I lines have very prominent P Cygni profiles, and that virtually all the emission features undergo changes in equivalent width on a time scale of days. Anomalous emission features are described which consist of three previously unreported, very strong, broad emission lines at unfamiliar wavelengths in the green, red, and IR, and which vary nightly in intensity, profile, and wavelength. SS 433 is inferred to be a luminous object with an absolute visual magnitude of -3.1 or brighter.
Document ID
19790051628
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Margon, B.
(Lick Observatory Santa Cruz, CA, United States)
Stone, R. P. S.
(Lick Observatory Santa Cruz, CA, United States)
Klemola, A.
(Lick Observatory Santa Cruz, Calif., United States)
Ford, H. C.
(Lick Observatory Santa Cruz, CA, United States)
Katz, J. I.
(Lick Observatory Santa Cruz, CA, United States)
Kwitter, K. B.
(Lick Observatory Santa Cruz, CA, United States)
Ulrich, R. K.
(Lick Observatory Santa Cruz, CA, United States)
Date Acquired
August 9, 2013
Publication Date
May 15, 1979
Publication Information
Publication: Astrophysical Journal
Subject Category
Astronomy
Accession Number
79A35641
Funding Number(s)
CONTRACT_GRANT: NSF AST-76-21312
CONTRACT_GRANT: NSF AST-77-27745
CONTRACT_GRANT: NSG-7341
CONTRACT_GRANT: NSF AST-76-81342
CONTRACT_GRANT: NSF AST-76-20260
Distribution Limits
Public
Copyright
Other

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