| Autor: |
P. J. Carter, T. R. Marsh, D. Steeghs, E. Breedt, C. M. Copperwheat, B. T. Gansicke, P. J. Groot, G. Nelemans |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Acta Polytechnica CTU Proceedings, Vol 2, Iss 1, Pp 178-182 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
2336-5382 |
| DOI: |
10.14311/APP.2015.02.0178 |
| Popis: |
We present results from a spectroscopic survey designed to uncover AM Canum Venaticorum (AM CVn) binaries hidden in the photometric database of the Sloan Digital Sky Survey (SDSS). The discovery of only 7 new AM CVns in the observed part of our sample suggests a lower space density than previously predicted. Based on the complete g≤19 sample, we calculate an observed space density for AM CVns of (5 ± 3) × 10−7 pc−3. We also compare the cataclysmic variables (CVs) discovered via this survey to those found in the SDSS spectroscopy, and we discuss SBSS 1108+574, an unusually helium-rich CV that has a spectroscopically confirmed orbital period of 55 minutes, well below the CV period minimum (~80 min). SBSS 1108+574 may represent an AM CVn forming via the ‘evolved CV’ formation channel. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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