| Issue |
A&A
Volume 381, Number 2, JanuaryII 2002
|
|
|---|---|---|
| Page(s) | 487 - 490 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20011478 | |
| Published online | 15 January 2002 | |
The high-field magnetic white dwarf LP790-29: Not a fast rotator *
Universitäts-Sternwarte, Geismarlandstr. 11, 37083 Göttingen, Germany
Corresponding author: K. Beuermann, beuermann@uni-sw.gwdg.de
Received:
21
September
2001
Accepted:
18
October
2001
We have investigated the nature of the magnetic white dwarf
LP 790-29 = LHS 2293 by polarimetric monitoring, searching for short-term
variability. No periodicity was found and we can exclude rotation
periods between 4 s and 1.5 hour with a high confidence. Maximum
amplitudes of sinusoidal variations are 
mag and
% for a mean value of the R-band circular
polarization of 
%. Combined with earlier
results by other authors, our observation suggests that LP 790-29 is, in
fact, an extremely slowly rotating single white dwarf and not an
unrecognized fast rotator and/or disguised cataclysmic variable.
Key words: stars: white dwarfs / stars: rotation / stars: individual: LP790-29
© ESO, 2002
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