Spectroscopic observations of the candidate star coincident with A0620-00

Journal Article · Sat May 15 04:00:00 EDT 1976 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/154380· OSTI ID:7344913

Gull, T R; York, D G; Snow, Jr, T P; Henize, K G

Several spectra of the optical object identified with the X-ray flare source A0620-00 have been obtained at 5 A mm/sup -1/ with the Cassegrain echelle spectrograph on the 4 m Mayall telescope at Kitt Peak National Observatory. These spectra reveal no significant stellar lines, but the flux distribution in the range 4250-7400 A, dereddened for E (B-V) =0.9 mag, is similar to that of an O star. The color excess, which is derived from the observed strength of the lambda5780 diffuse interstellar band, and the velocities and strengths of the interstellar Na i D lines, imply that the object is between 1.5 and 2.5 kpc from the Sun. If a distance of 2 kpc is adopted, then the luminosity of the source in the observed wavelength region is roughly 5 x 10/sup 35/ ergs s/sup -1/. The possibility that this object is a slow nova is discussed. (AIP)

• Research Organization: Lockheed Electronics, Inc.
• OSTI ID: 7344913
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 206:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640103 -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
COLOR
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ELEMENTS
EMISSION SPECTRA
LUMINOSITY
METALS
NOVAE
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
SODIUM
SPECTRA
STARS