Magnetic White Dwarf Stars in the Sloan Digital Sky Survey
Solar and Stellar Astrophysics
2015-06-12 v2
Abstract
To obtain a better statistics on the occurrence of magnetism among white dwarfs, we searched the spectra of the hydrogen atmosphere white dwarf stars (DAs) in the Data Release 7 of the Sloan Digital Sky Survey (SDSS) for Zeeman splittings and estimated the magnetic fields. We found 521 DAs with detectable Zeeman splittings, with fields in the range from around 1 MG to 733 MG, which amounts to 4% of all DAs observed. As the SDSS spectra have low signal-to-noise ratios, we carefully investigated by simulations with theoretical spectra how reliable our detection of magnetic field was.
Keywords
Cite
@article{arxiv.1211.5709,
title = {Magnetic White Dwarf Stars in the Sloan Digital Sky Survey},
author = {S. O. Kepler and Ingrid Pelisoli and Stefan Jordan and Scot J. Kleinman and Baybars Kulebi and Detlev Koester and Viviane Peçanha and Bárbara G. Castanheira and Atsuko Nitta and José Eduardo da Silveira Costa and Don Earl Winget and Antonio Kanaan and Luciano Fraga},
journal= {arXiv preprint arXiv:1211.5709},
year = {2015}
}
Comments
30 pages, 14 figures. R1: updated references