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Record Details

Record 39 of 6240
Extinction, ejecta masses, and radial velocities of novae
External Online Source: doi:10.1086/174062
Author and Affiliation:
Williams, Robert E.(Space Telescope Science Institute, Baltimore, MD, United States)
Abstract: Interstellar reddening is determined for a number of recent novae based upon emission-line ratios which are generally observable using CCDs. Large values of extinction are found for most systems, possibly indicative of an intrinsic component of reddening in postoutburst novae. The unusual characteristics of the (O I) lines in novae, which are strong and optically thick, require a large population of very dense globules which are the likely sites of dust formation. These pyroclasts must be ejected from the white dwarf. The total mass of the neutral gas in the globules in some of the objects is substantially larger than the masses normally derived for the ionized ejecta of novae. The distribution of radial velocities of Galactic novae in the Tololo sample, although uncertain, shows an asymmetry in having predominantly negative values. Either high internal absorption in the expanding ejecta skews the emission lines to bluer wavelengths, or most of the novae are moving out from the center of the Galaxy.
Publication Date: May 01, 1994
Document ID:
19950038781
(Acquired Dec 28, 1995)
Accession Number: 95A70380
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1; p. p. 279-287; (ISSN 0004-637X); 426; 1
Publisher Information: United States
Contract/Grant/Task Num: NAS5-26555
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: EJECTA; EMISSION SPECTRA; INTERSTELLAR EXTINCTION; LINE SPECTRA; NOVAE; OXYGEN; RADIAL VELOCITY; STELLAR ENVELOPES; WHITE DWARF STARS; CHARGE COUPLED DEVICES; COSMIC DUST; INTERSTELLAR GAS; ION RECOMBINATION; OPTICAL THICKNESS
Imprint And Other Notes: Astrophysical Journal, Part 1 vol. 426, no. 1 p. 279-287 May 1, 1994
Availability Source: Other Sources
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