Discovery of a magnetic DZ white dwarf with Zeeman-split lines of heavy elements

Authors
Reid, IN Liebert, J Schmidt, GD
Citation
In. Reid et al., Discovery of a magnetic DZ white dwarf with Zeeman-split lines of heavy elements, ASTROPHYS J, 550(1), 2001, pp. L61-L63
Citations number
19
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
550
Issue
1
Year of publication
2001
Part
2
Pages
L61 - L63
Database
ISI
SICI code
0004-637X(20010320)550:1<L61:DOAMDW>2.0.ZU;2-2
Abstract
A spectroscopic survey of unstudied Luyten half-second proper-motion stars has resulted in the discovery of an unusual new magnetic white dwarf. LHS 2 534 proves to be the first magnetic DZ, showing Zeeman-split Na I and Mg I components, as well as Ca I and Ca ii lines for which Zeeman components are blended. The Na I splittings result in a mean surface field strength estim ate of 1.92 MG. Apart from the magnetic field, LHS 2534 is one of the most heavily blanketed and coolest DZ white dwarfs at T-eff similar to 6000 K.