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http://hea-www.harvard.edu/~garcia/apj.551.l147.ps.
http://hea-www.harvard.edu/~garcia/apj.551.l147.ps.
1. Watching the Stars go `Round and `Round
... I present results from several seasons of photometric observations of X--ray sources in the Orion OB1a and OB1b star formation regions. The initial goal was to measure the rotational periods of several dozen pre--main sequence (PMS) stars. ... Infrared and optical data confirm that 90% of the X--ray sources are PMS and about 10% of the PMS stars may have disks. ... I find rotation periods for five stars at confidence of greater than 99.9/ greater than 99/ at much lower confidence. ...
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Ссылки http://hea-www.harvard.edu/~swolk/thesis/thesis.html -- 15.5 Кб -- 01.10.2012
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