Connection between parameters of velocity ellipsoids of F stars and their metallicity, temperature, and age

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

4

F Stars, Metallicity, Stellar Evolution, Stellar Motions, Stellar Temperature, Ellipsoids, Stellar Physics, Velocity Distribution

Scientific paper

Velocity ellipsoid parameters are investigated on the basis of data of uvby photometry and the proper motions of about 5500 nearby F stars. The sizes of ellipsoid semiaxes are found to increase systematically for groups of stars with a decrease of both temperature (at constant metallicity) and metallicity (at constant temperature). As the age of a star group increases, stellar ellipsoids become more spherical, and the vertex deviation tends toward zero. The metallicity-velocity dispersion relation of the disk stars exhibits a break at a point which corresponds to the middle of the metallicity distribution. As a result, the velocity dispersion decreases with increasing metallicity for metal-poor stars and remains essentially constant for metal-rich stars.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Connection between parameters of velocity ellipsoids of F stars and their metallicity, temperature, and age does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Connection between parameters of velocity ellipsoids of F stars and their metallicity, temperature, and age, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Connection between parameters of velocity ellipsoids of F stars and their metallicity, temperature, and age will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1869765

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.