Stellar Rotation: A Probe of Initial Star-Forming Conditions

Computer Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

Projected rotational velocities (vsini) have been measured for B stars in the rich, dense h and chi Persei double cluster along with 7 young (1-7 Myr age) clusters of intermediate density, and compared with the distribution of rotational velocities for a sample of field stars having similar ages. In comparison with stars populating the field (and presumably formed in low density environments), the observed rotation speeds among stars formed in denser cluster environments are consistently higher. Moreover, the cluster population lacks the large cohort of slow (vsini < 50 km/sec) stars found among field B stars. We argue that both the higher rotation rates and the pattern of rotation speeds that differentiate B stars in clusters from their field analogs were likely imprinted during the star formation process rather than a result of angular momentum evolution. We suggest that these differences may reflect the effects of the higher accretion rates that theory suggests are characteristic of regions that give birth to dense clusters, namely, (1) higher initial rotation speeds; and (2) higher initial radii along the stellar birth line, resulting in greater spin-up between the birth line and the ZAMS.

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

Stellar Rotation: A Probe of Initial Star-Forming Conditions 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 Stellar Rotation: A Probe of Initial Star-Forming Conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar Rotation: A Probe of Initial Star-Forming Conditions will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1469262

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