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Discovery of X-ray emission associated with the Gum NebulaThe Gum Nebula was observed by the A-2 LED proportional counters on the HEAO-1 satellite as part of the all-sky survey. The first detection of X-ray emission associated with the Gum Nebula is reported. Soft X-ray spectra were constructed from the A-2 LED PHA data. Single temperature Raymond-Smith models were fitted to the observed spectra to yield temperature, column density and emission measure. The temperature is 6 x 10 exp 5 K, the column density 4 x 10 exp 20/sq cm, and the emission measure 5 cm exp-6 pc. The X-ray and optical properties of the Gum Nebula are consistent with a supernova remnant in the shell stage of evolution, which was the product of an energetic (3 x 10 exp 51 ergs) supernova explosion which occurred about 2 x 10 exp 6 yr ago.
Document ID
19920039739
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Leahy, D. A.
(Calgary, University Canada)
Nousek, J.
(Calgary Univ. Alberta Canada)
Garmire, G.
(Pennsylvania State university, University Park, United States)
Date Acquired
August 15, 2013
Publication Date
February 1, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 385
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A22363
Funding Number(s)
CONTRACT_GRANT: NAG5-26809
CONTRACT_GRANT: NAG5-941
Distribution Limits
Public
Copyright
Other

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