NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 17 of 779
Iron abundance in the hot DA white dwarfs Feige 24 and G191 B2B
External Online Source: doi:10.1086/186417
Author and Affiliation:
Vennes, Stephane(California, University, Berkeley, United States)
Chayer, Pierre(Montreal, Universite, Montreal, Canada)
Thorstensen, John R.(Dartmouth College, Hanover, NH, United States)
Bowyer, Stuart(California, University, Berkeley, United States)
Shipman, Harry L.(Delaware, University, Newark, United States)
Abstract: Attention is given to model calculations of the far- and extreme-UV line spectra of highly ionized Fe species (Fe IV, Fe V, and Fe VI) for hot high-gravity H-rich stars. A spectral analysis of 31 hr of exposure of the DA white dwarf Feige 24 with IUE in the echelle mode reveals the presence of Fe with an abundance relative to H by number of (5-10) x 10 exp -6 with an uncertainty dominated by the determination of stellar parameters. An analysis of IUE data from the white dwarf G191 B2B results in a similar Fe abundance if this star shares similar atmospheric parameters (Teff, g) with Feige 24. Fe is thus the second most abundant photospheric element in hot DA white dwarfs.
Publication Date: Jun 10, 1992
Document ID:
19920059822
(Acquired Nov 22, 1995)
Accession Number: 92A42446
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 392; 1, Ju; L27-L30
Publisher Information: United States
Contract/Grant/Task Num: NAS5-30180; NAG5-1805; NAG5-972; NAG5-1409; NAG5-1654
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: IUE; METALLICITY; STELLAR ATMOSPHERES; STELLAR SPECTROPHOTOMETRY; ULTRAVIOLET SPECTRA; WHITE DWARF STARS; ABUNDANCE; IRON; STELLAR COMPOSITION
Imprint And Other Notes: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 392, no. 1, June 10, 1992, p. L27-L30. Research supported by NSF.
Miscellaneous Notes: Research supported by N
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 19, 2011
Contact Us