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Magnetic White Dwarfs from the SDSS. II. The Second and Third Data Releases
- Source :
- The Astronomical Journal. 130:734-741
- Publication Year :
- 2005
- Publisher :
- American Astronomical Society, 2005.
-
Abstract
- Fifty-two magnetic white dwarfs have been identified in spectroscopic observations from the Sloan Digital Sky Survey (SDSS) obtained between mid-2002 and the end of 2004, including Data Releases 2 and 3. Though not as numerous nor as diverse as the discoveries from the first Data Release, the collection exhibits polar field strengths ranging from 1.5MG to ~1000MG, and includes two new unusual atomic DQA examples, a molecular DQ, and five stars that show hydrogen in fields above 500MG. The highest-field example, SDSSJ2346+3853, may be the most strongly magnetic white dwarf yet discovered. Analysis of the photometric data indicates that the magnetic sample spans the same temperature range as for nonmagnetic white dwarfs from the SDSS, and support is found for previous claims that magnetic white dwarfs tend to have larger masses than their nonmagnetic counterparts. A glaring exception to this trend is the apparently low-gravity object SDSSJ0933+1022, which may have a history involving a close binary companion.<br />Comment: 20 pages, 4 figures Accepted for publication in the Astronomical Journal
- Subjects :
- Physics
Field (physics)
media_common.quotation_subject
Astrophysics (astro-ph)
FOS: Physical sciences
White dwarf
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Stars
Space and Planetary Science
Sky
Astrophysics::Solar and Stellar Astrophysics
Polar
Data release
Astrophysics::Galaxy Astrophysics
media_common
Subjects
Details
- ISSN :
- 15383881 and 00046256
- Volume :
- 130
- Database :
- OpenAIRE
- Journal :
- The Astronomical Journal
- Accession number :
- edsair.doi.dedup.....10d2b010a4e017f5c5a85439b94710d6