NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Identification of two hard X-ray emitting Be stars using the HEAO 1 scanning modulation collimatorUsing precise positions from the HEAO 1 Scanning Modulation Collimator experiment, two hard X-ray sources, 4U 0728 - 25 = 3A 0726 - 260 and 4U 2206 + 54 = 3A 2206 + 543, are identified with early-type stars. In both cases broad (10 A FWHM) H-alpha emission is detected. The UBV colors suggest that the optical counterparts are main-sequence B0-B2 stars at 2-6 kpc, implying a mean X-ray luminosity of order 10 to the 35th ergs/sq cm s (2-10 keV). The X-ray emission in both cases is highly variable, and it is suggested that they belong to the class of X-ray emitting Be stars, containing a neutron star in a widely separated binary system.
Document ID
19840052293
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/162042
Authors
Steiner, J. E. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Ferrara, A. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Garcia, M. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Patterson, J. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Schwartz, D. A. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Warwick, R. S. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Watson, M. G. (Leicester, University Leicester, United Kingdom)
Mcclintock, J. E. (MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
May 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 280
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
84A35080
Funding Number(s)
CONTRACT_GRANT: NAS8-27972
CONTRACT_GRANT: NAS8-30453
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.

Related Records

There are no records associated with this record.
No Preview Available