The optical identification of 2A 0311-227 with a new AM Herculis-type object

Details The optical identification of 2A 0311-227 with a new AM Herculis-type object The optical identification of 2A 0311-227 with a new AM Herculis-type object

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232l..27g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 232, Aug. 15, 1979, p. L27-L31.

Astronomy and Astrophysics

Astronomy

46

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

Scientific paper

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.

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