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Record 9 of 2378
The origin of the Gum nebula
Author and Affiliation:
Bruhweiler, F. C.(Catholic University, of America, Washington, DC, United States)
Kafatos, M.(George Mason University, Fairfax, VA, United States)
Brandt, J. C.(NASA Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, Greenbelt, MD, United States)
Abstract: Obsrvations and theoretical investigations of the Gum nebula (GN) since about 1971 are reviewed. Direct observations of the GN, the Vela X supernova remnant (SNR), the Vela pulsar, and other stars in or near the GN are discussed with those of related phenomena such as the radio loops and known SNRs; the emphasis is on studies of the interstellar absorption lines, the evidence for hot gas in the GN, and the extended diffuse emission. The four basic models proposed for the GN are considered: a fossil Stromgren sphere, an old SNR, an H II region, or a superbubble. The GN physical parameters predicted by each model are listed in a table and compared. A minimum explanation which attributes the 36 x 36-deg filamentary structure and the 125-pc radius structure to the action of the stellar winds from Zeta Pup and Gamma-2 Vel (and perhaps the effect of a Vel X supernova explosion 20,000 years ago) is found most appropriate, at least until the questions of the net expansion rate of the GN (about 20 km/sec or about zero?) and the existence of the diffuse emission beyond the filamentary structure are resolved by observations.
Publication Date: Sep 01, 1983
Document ID:
(Acquired Nov 28, 1995)
Accession Number: 84A10255
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Comments on Modern Physics, Part C - Comments on Astrophysics (ISSN 0146-2970); 10; 1-14
Publisher Information: United Kingdom
Financial Sponsor: NASA; United States
Organization Source: Catholic Univ. of America; Washington, DC, United States
George Mason Univ.; Fairfax, VA, United States
NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 14p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
Imprint And Other Notes: Comments on Modern Physics, Part C - Comments on Astrophysics (ISSN 0146-2970), vol. 10, Sept. 1983, p. 1-14.
Availability Source: Other Sources
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