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)
· arXiv e-print (arXiv:astro-ph/0204026)
· On-line Data
· References in the article
· Citations to the Article (5) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (7)
· NED Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Boron in the Small Magellanic Cloud: A Novel Test of Light-Element Production
Authors:
Brooks, A. M.; Venn, K. A.; Lambert, D. L.; Lemke, M.; Cunha, K.; Smith, V. V.
Affiliation:
AA(Department of Physics and Astronomy, Macalester College, 1600 Grand Avenue, Saint Paul, MN 55105; Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027.), AB(Department of Physics and Astronomy, Macalester College, 1600 Grand Avenue, Saint Paul, MN 55105), AC(Department of Astronomy, University of Texas at Austin, Austin, TX 78712), AD(Dr. Karl Remeis-Sternwarte, Sternwartstrasse 7, Bamberg D-96049, Germany), AE(Observatório Nacional-CNPq, Rua General José Cristino 77, São Cristóvão 20921, Rio de Janeiro, Brazil), AF(Department of Physics, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968)
Publication:
The Astrophysical Journal, Volume 573, Issue 2, pp. 584-596. (ApJ Homepage)
Publication Date:
07/2002
Origin:
UCP
ApJ Keywords:
Galaxies: Magellanic Clouds, Nuclear Reactions, Nucleosynthesis, Abundances, Stars: Abundances, Stars: Evolution, Stars: Individual: Alphanumeric: AV 304, Stars: Rotation
DOI:
10.1086/340662
Bibliographic Code:
2002ApJ...573..584B

Abstract

Hubble Space Telescope Space Telescope Imaging Spectrograph (STIS) observations of the B III resonance line at λ2066 have been obtained and analyzed for two Small Magellanic Cloud (SMC) B-type stars. While boron is not detected in either star, upper limits to the boron abundance are set, with 12+log(B/H)<=1.6 for both AV 304 and NGC 346-637. The upper limits are consistent with the relationship between boron and oxygen previously reported for Galactic disk stars. The SMC upper limits are discussed in light of that galaxy's star formation history, present oxygen abundance, and present cosmic-ray flux. The UV spectrum has also been used to determine the iron-group abundances in the SMC stars. For AV 304, [Fe/H]=-0.6+/-0.2, from both an absolute and a differential analysis (with respect to the Galactic B-type star HD 36591). This is consistent with results from A-F supergiants in the SMC. A lower iron abundance is found for NGC 346-637, [Fe/H]=-1.0+/-0.3, but this is in good agreement with the supergiant iron abundances in NGC 330, another young SMC cluster. We propose that NGC 346-637 might be an unrecognized binary, however, which complicates its spectral analysis. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. These observations are associated with proposal GO 07400.
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