2005/08/30 by Wen-Ping Chen, W. P. Chen, K. Sanchawala +3
Engineering · Mathematics · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Binary number #Binary star #Cataclysmic variable star #Contact binary #Galaxy #Luminosity #Mathematics #Physics #ROSAT #Sky #Stars #Stellar, planetary, and galactic studies #Variable star #White dwarf #astro-ph
paper · pdf · doi:10.1086/499206
10 pages, 2 figures, 1 table; submitted to AJ
arxiv created 2005/08/30 · openalex publication_date 2006/01/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present cross-identification of archived ROSAT X-ray point sources with W UMa variable stars found in the All-Sky Automated Survey. A total of 34 W UMa stars have been found associated with X-ray emission. We compute the distances of these W UMa systems and hence their X-ray luminosities. Our data support the "supersaturation" phenomenon seen in these fast rotators, namely that the faster a W UMa star rotates, the weaker its X-ray luminosity.