Rotation periods of T Tauri stars in the Orion Nebula Cluster - A bimodal frequency distribution

Details Rotation periods of T Tauri stars in the Orion Nebula Cluster - A bimodal frequency distribution Rotation periods of T Tauri stars in the Orion Nebula Cluster - A bimodal frequency distribution

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398l..61a&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 398, no. 1, p. L61-L64.

Astronomy and Astrophysics

Astrophysics

83

Frequency Distribution, Orion Nebula, Stellar Rotation, T Tauri Stars, Light Curve, Stellar Spectrophotometry

Scientific paper

CCD photometric monitoring of 11 fields in the Orion Nebula Cluster (ONC) was carried out at Van Vleck Observatory during the 1991/92 Milky Way season. More than 180 variable stars were detected and analysis of their light curves has led to the discovery of 35 rotation periods for premain-sequence stars, more than doubling the existing all-sky sample. Our data reveal a distinct bimodality in the frequency distribution of rotation periods of the ONC stars. There is a 'rapid rotator' group with a mean period of 2.2 days and a dispersion of about 1 day, and a 'slow rotator' group with mean period around 8.5 days and dispersion of about 2.5 days. A comparison is made between the ONC results and the previously known rotation period distribution for stars in T associations, which is also bimodal. The ONC sample has an enhanced long period tail and more long period stars relative to short period stars; both differences could be the result of selection effects influencing the T association sample. The significance of these results for studies of angular momentum evolution in low mass stars is briefly discussed.

Affiliated with

Also associated with

No associations

Rating

Rotation periods of T Tauri stars in the Orion Nebula Cluster - A bimodal frequency distribution 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 Rotation periods of T Tauri stars in the Orion Nebula Cluster - A bimodal frequency distribution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotation periods of T Tauri stars in the Orion Nebula Cluster - A bimodal frequency distribution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1869696