A planetary system for Gamma Cephei?
Abstract
Gamma Cephei, an orange-yellow star with a visual magnitude of +3.2, is studied. Its absolute magnitude is 2.2, compared with 4.84 for the sun; the star is 11.5 times brighter than the sun and has a mass twice as great. It is believed that the systematic cyclic variations of radial velocity with periods longer than 5 yrs imply companion masses of 1.5-2.0 x Jupiter, namely, planetary masses.
- Publication:
-
Journal of the British Interplanetary Society
- Pub Date:
- July 1989
- Bibcode:
- 1989JBIS...42..335L
- Keywords:
-
- Cepheus Constellation;
- Extrasolar Planets;
- Planetary Systems;
- Stellar Motions;
- Radial Velocity;
- Sun;
- Velocity Measurement;
- PLANETS;
- POPULAR;
- DIAGRAMS;
- LUMINOSITY;
- MASS;
- ASTRONOMY;
- EQUIPMENT;
- SIZE;
- THEORETICAL STUDIES;
- ORBITS;
- DISTANCE;
- TEMPERATURE;
- COMPARISONS;
- RADIAL VELOCITY;
- Astrophysics; Planets;
- Planetary Companions: Detection;
- Planetary Companions: Nearby Stars