The Library
A deeply eclipsing detached double helium white dwarf binary
Tools
Tools
Tools
Parsons, S. G., Marsh, T. R., Gaensicke, B. T., Drake, A. J. and Koester, Detlev (2011) A deeply eclipsing detached double helium white dwarf binary. The Astrophysical Journal. Letters, Vol.735 (No.2). L30. doi:10.1088/2041-8205/735/2/L30 ISSN 2041-8205.
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/10.1088/2041-8205/735/2/L30
Abstract
Using Liverpool Telescope+RISE photometry we identify the 2.78 hr period binary star CSS 41177 as a detached eclipsing double white dwarf binary with a 21,100 K primary star and a 10,500 K secondary star. This makes CSS 41177 only the second known eclipsing double white dwarf binary after NLTT 11748. The 2 minute long primary eclipse is 40% deep and the secondary eclipse 10% deep. From Gemini+GMOS spectroscopy, we measure the radial velocities of both components of the binary from the Ha absorption line cores. These measurements, combined with the light curve information, yield white dwarf masses of M(1) = 0.283 +/- 0.064 M(circle dot) and M(2) = 0.274 +/- 0.034 M(circle dot), making them both helium core white dwarfs. As an eclipsing, double-lined spectroscopic binary, CSS 41177 is ideally suited to measuring precise, model-independent masses and radii. The two white dwarfs will merge in roughly 1.1 Gyr to form a single sdB star.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Double stars, Eclipsing binaries, Stars, White dwarf stars | ||||
| Journal or Publication Title: | The Astrophysical Journal. Letters | ||||
| Publisher: | Institute of Physics Publishing, Inc. | ||||
| ISSN: | 2041-8205 | ||||
| Official Date: | 2011 | ||||
| Dates: |
|
||||
| Volume: | Vol.735 | ||||
| Number: | No.2 | ||||
| Page Range: | L30 | ||||
| DOI: | 10.1088/2041-8205/735/2/L30 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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 |
