Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· References in the article
· Citations to the Article (35) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· NED Objects (3)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Deuterium toward Quasar Q0014+813
Authors:
Burles, Scott; Kirkman, David; Tytler, David
Publication:
The Astrophysical Journal, Volume 519, Issue 1, pp. 18-21. (ApJ Homepage)
Publication Date:
07/1999
Origin:
APJ
ApJ Keywords:
ELEMENTARY PARTICLES, GALAXIES: ABUNDANCES, QUASARS: INDIVIDUAL (Q0014+813)
DOI:
10.1086/307331
Bibliographic Code:
1999ApJ...519...18B

Abstract

We present new Keck telescope spectra of the first QSO claimed to show deuterium absorption: Q0014+813. Improved signal on the Lyman series absorption lines gives more accurate information on the hydrogen absorption and more accurate predictions for the position, width, and shape of the associated deuterium absorption. There are three reasons why the absorption line near the expected position of D in the absorption system at z_abs=3.32 is not primarily D: (1) it is 17+/-1 km s^-1 from the expected position, (2) it is too wide, and (3) it does not have the expected profile, which is given by the H I lines. This absorption can be explained by a single H Lyalpha line at a different redshift. Any absorption from D would be completely blended with this additional H absorption. We find 0<D/H<35x10^-5 for this absorber which once offered the best evidence for a high primordial value of D/H. In a second absorption system at z_abs=2.80 we again find that H alone can explain the spectrum, without any D. Deuterium has been seen and measured in only two QSOs (Q1937-1009 and Q1009+2956) and both give a low value of D/H=3.4x10^-5. Several other QSOs give upper limits which are less sensitive.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints