On a model of local gas related to Gould's belt.
Abstract
A model of the local gas related to Gould's belt is developed that considers Gould's belt as an expanding ring of gas and includes the effects of the braking force due to the interaction between the expanding and the non-expanding interstellar gas. The model is fitted to the observed radial velocities from the 21 cm line of H I, and the center of the ring is found to be in the direction of longitude of approximately 131 degrees at a distance from the sun of 166 pc, while the semi-major and semi-minor axes of the ring are determined to be 364 pc and 211 pc. In addition, it is found that Gould's belt has an age of approximately 3 x 10 to the 7th years and a mass of 1.2 x 10 to the 6th solar masses. The age that is obtained indicates that only the youngest stars of the expanding local group of stars would have been formed in the ring or by its influence. It is proposed that Gould's belt was formed by the interaction of stellar winds and supernovae, which originated in the Cas-Tau group, with the surrounding interstellar medium.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1982
- Bibcode:
- 1982A&A...112..195O
- Keywords:
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- Astronomical Models;
- Interstellar Gas;
- Hydrogen Clouds;
- Milky Way Galaxy;
- Radial Velocity;
- Stellar Evolution;
- Astrophysics