The 59 S periodicity of 2CG 195+4 (Geminga) and a low-mass binary model

Details The 59 S periodicity of 2CG 195+4 (Geminga) and a low-mass binary model The 59 S periodicity of 2CG 195+4 (Geminga) and a low-mass binary model

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986japa....7..299l&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 7, Dec. 1986, p. 299-304. NSERC-supported research.

Astronomy and Astrophysics

Astrophysics

1

Binary Stars, Gamma Ray Spectra, Main Sequence Stars, Neutron Stars, Variable Stars, X Ray Sources, Angular Velocity, Stellar Mass Accretion, Stellar Mass Ejection, Stellar Models, Stellar Rotation

Scientific paper

An examination of the existing period searches for 2CG 195+4 leads to the conclusion that the 59 s periodicity is highly significant only for the 1981 March 17 - 18 detection of Bignami, Caraveo & Paul (1984).The statistical significance is increased substantially if the pulsation period is half the previously reported value. The period derivative is not well determined. The authors propose that 2CG 195+4 is a neutron star powered by accretion from a low (⪉1 M_sun;) mass main-sequence companion.

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