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Record 3 of 13179
10 micron detection of the hard X-ray transient GRO J0422+32: Free-free emission from an X-ray-driven accretion disk wind?
External Online Source: doi:10.1086/187403
Author and Affiliation:
Paradijs, Van J.(Univ. of Alabama, Huntsville, AL, United States)
Telesco, C. M.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Kouveliotou, C.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Fishman, G. J.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Abstract: We report the detection of 10 micrometer emission from the transient low-mass X-ray binary (LMXB) and optical nova GRO J0422+32 near the maximum of its outburst. We discuss this result in terms of (1) a 'standard' model according to which low-energy radiation of LMXB is caused by reprocessing of X-rays in an accretion disk; (2) emission from a cool secondary star; (3) emission from dust grains heated by the transient X-rays, and (4) free-free emission from an X-ray-driven wind from the accretion disk. Only the fourth alternative provides a viable explanation for the observed 10 micrometer emission, with a mass-loss rate in the disk wind that may be substantially higher than the rate of accretion onto the compact star. The presence of such a wind may have a profound effect on the evolution of the binary, and contribute to the solution of the 'birthrate problem' of millisecond ratio pulsars.
Publication Date: Jul 01, 1994
Document ID:
19950029684
(Acquired Dec 28, 1995)
Accession Number: 95A61283
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: The Astrophysical Journal (ISSN 0004-637X); 429; 1, pt; p. L19-L23
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCRETION DISKS; STELLAR MASS ACCRETION; STELLAR WINDS; X RAY BINARIES
Imprint And Other Notes: The Astrophysical Journal vol. 429, no. 1, pt. 2 p. L19-L23 July 1, 1994
Availability Source: Other Sources
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