EXO 023432-5232.3 : a new 114-minute probable AM Herculis-type binary.
Tagliaferri, G.; Beuermann, K.; Giommi, P.; Thomas, H. C.
Germany, Netherlands
Abstract
A new probable AM Herculis binary was found in the course of an optical identification program of serendipitous X-ray sources detected with the EXOSAT satellite. Spectrophotometry of the 19 mag optical counterpart shows that it carries most of the hallmarks of AM Herculis binaries. The orbital period is 114.6 minutes and makes it the sixth AM Her star in the small period range of 113 to 115 minutes. The system is at a probable distance of 300 - 500 pc. The authors comment on the space density of AM Herculis binaries.