The Library
Photometric variability of the unique magnetic white dwarf GD 356
Tools
UNSPECIFIED (2004) Photometric variability of the unique magnetic white dwarf GD 356. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 348 (3). L33-L37. doi:10.1111/j.1365-2966.2004.07538.x ISSN 0035-8711.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2004.07538.x
Abstract
GD 356 is a magnetic white dwarf (B = 13 MG) that uniquely displays weak resolved Zeeman triplets of Halpha and Hbeta in emission. As such, GD 356 may be the only known white dwarf with some kind of chromosphere, although accretion from the interstellar medium or more exotic mechanisms cannot be ruled out. Here, we report the detection of low amplitude (+/- similar to0.2 per cent) near-sinusoidal photometric (V-band) variability in GD 356, with a period of 0.0803 d (similar to115 min). We interpret this as the rotation period of the star. We model the variability with a dark spot (by analogy with star spots) covering 10 per cent of the stellar surface. It seems likely that this spot is also the site of the Zeeman emission, requiring the presence of a temperature inversion. We show that the spot is never totally visible or obscured, and that both polar and equatorial spots produce good fits to the data when viewed at high and low inclination respectively.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||
Journal or Publication Title: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | ||||
Publisher: | BLACKWELL PUBLISHING LTD | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 1 March 2004 | ||||
Dates: |
|
||||
Volume: | 348 | ||||
Number: | 3 | ||||
Number of Pages: | 5 | ||||
Page Range: | L33-L37 | ||||
DOI: | 10.1111/j.1365-2966.2004.07538.x | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |