Some implications of period changes in the first binary radio pulsar.
Abstract
The absence of a large advance of the periastron of the first binary pulsar is shown to imply that the unseen companion is also collapsed. The existence of a lower limit to the mass of the observed pulsar of about 0.3 solar mass requires a minimum general relativistic periastron advance of about 2 degress per year. Other causes of apparent and true pulse period changes are also briefly considered.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1975
- DOI:
- 10.1086/181722
- Bibcode:
- 1975ApJ...195L.113B
- Keywords:
-
- Binary Stars;
- Gravitational Collapse;
- Periodic Variations;
- Pulsars;
- Radio Stars;
- Relativistic Effects;
- Angular Velocity;
- Apsides;
- Companion Stars;
- Mass Ratios;
- Precession;
- Stellar Rotation;
- Variable Stars;
- Astrophysics