The optical identification of 2A 0311-227 with a new AM Herculis-type object.
Abstract
The X-ray source 2A 0311-227 has been precisely positioned by using the HEAO 1 scanning modulation collimator, resulting in an optical candidate with a B magnitude of about 15. Medium-resolution optical spectra of this star show remarkable similarity to the spectrum of AM Her, a short-period binary containing a magnetic white dwarf. The Balmer decrement in 2A 0311-227 is also similar to that in AM Her and may likewise be attributed to collisional excitation in a plasma with an electron density of the order of 10 to the 13th per cu cm.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1979
- DOI:
- 10.1086/183030
- Bibcode:
- 1979ApJ...232L..27G
- Keywords:
-
- Binary Stars;
- Magnetic Stars;
- Optical Emission Spectroscopy;
- Spaceborne Astronomy;
- White Dwarf Stars;
- X Ray Sources;
- Circular Polarization;
- Heao 2;
- Light Curve;
- Optical Polarization;
- X Ray Spectra;
- Astrophysics;
- AM Herculis Stars:Spectra;
- AM Herculis Stars:X-Ray Sources;
- X-Ray Sources:Optical Counterparts