On the gamma-ray source CG 195+4 (Geminga).
Abstract
Two different pictures of the pulsating gamma-ray source CG 195 plus 4 observed by the SAS 2 and COS B satellites are discussed. In the former a slowly rotating accreting neutron star surrounded by a cloud thick to X-rays is considered. In the latter the source is supposed to be a freely precessing neutron star with a spin period close to that of MP 0833 and a magnetic moment of 10 to the 31st power G-cu cm. The observations which can be important for clarifying the nature of the source are briefly examined.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 1977
- Bibcode:
- 1977A&A....61L..11M
- Keywords:
-
- Gamma Ray Astronomy;
- Neutron Stars;
- Stellar Rotation;
- Magnetic Moments;
- Pulsars;
- Spaceborne Astronomy;
- Stellar Mass Accretion;
- Astrophysics