Number of the records: 1
The heavily polluted atmosphere of the DAZ white dwarf GALEX J193156.8+011745
- 1.
SYSNO ASEP 0355102 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The heavily polluted atmosphere of the DAZ white dwarf GALEX J193156.8+011745 Author(s) Vennes, Stephane (ASU-R) ORCID, RID
Kawka, Adela (ASU-R) ORCID, RID
Németh, Péter (ASU-R) ORCIDSource Title Monthly Notices of the Royal Astronomical Society. - : Oxford University Press - ISSN 0035-8711
Roč. 404, č. 1 (2010), L40-L44Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords GALEX J193156.8+011745 ; white dwarfs Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics R&D Projects IAA300030908 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GAP209/10/0967 GA ČR - Czech Science Foundation (CSF) LC06014 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000276794600009 DOI 10.1111/j.1745-3933.2010.00830.x Annotation We report on the discovery of a new heavily polluted white dwarf. The DAZ white dwarf GALEX J193156.8+011745 was identified in a joint Galaxy Evolution Explorer (GALEX)/GSC survey of ultraviolet-excess objects. Optical spectra obtained at ESO New Technology Telescope show strong absorption lines of magnesium and silicon, and a detailed abundance analysis based on Very Large Telescope-Kueyen UVES spectra reveal super-solar abundances of silicon and magnesium and near-solar abundances of oxygen, calcium and iron. The overall abundance pattern bears the signature of on-going accretion on to the white dwarf atmosphere. The infrared spectral energy distribution shows an excess in the H and K bands likely associated with the accretion source. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2011
Number of the records: 1