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High-resolution IUE observations of interstellar absorption lines in the Vela supernova remnantUltraviolet spectra of 45 stars in the vicinity of the Vela supernova remnant were recorded by the short-wavelength echelle spectrograph aboard the International Ultraviolet Explorer (IUE). Over one-third of the stars show interstellar absorption lines at large radial velocities (greater than 60 km/s). The mapping of these high-velocity components in the sky suggests the motions are chaotic, rather than from a coherent expansion of the remnant material. In accord with earlier conclusions from Copernicus data, the gas at high velocity exhibits higher than normal ionization and shows substantially less depletion of nonvolatile elements than normal interstellar material at low velocities. Relatively strong lines from neutral carbon in the two excited fine-structure states indicate that the neutral clouds within the remnant have had their pressures enhanced by the passage of the blast wave from the supernova. Also, the remnant seems to show a significant enhancement in the abundances of low-velocity Si IV, C IV, and N V over those found in the general interstellar medium.
Document ID
19840046408
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jenkins, E. B.
(Princeton University New Observatory, Princeton, NJ, United States)
Wallerstein, G.
(Washington, University Seattle, WA, United States)
Silk, J.
(California, University Berkeley, CA, United States)
Date Acquired
August 12, 2013
Publication Date
March 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 278
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
84A29195
Funding Number(s)
CONTRACT_GRANT: NAS5-23576
CONTRACT_GRANT: NSG-5374
CONTRACT_GRANT: NSG-5248
CONTRACT_GRANT: NGR-05-003-578
Distribution Limits
Public
Copyright
Other

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