Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997

Details Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997 Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997

2000-07-07

arxiv.org/abs/astro-ph/0007088v1

Astronomy and Astrophysics

Astrophysics

10 pages, 7 figures, accepted for publication in A&A

Scientific paper

We present new surface (Doppler) images of the late-type single giant FK Com for June-July 1996, July-August 1996, April 1997 and June 1997. These images are compared with the previously published images from 1994 and 1995. The consecutive maps are cross-correlated to see the possible migration of the spots and the effects of differential rotation. The cross-correlation confirms an average longitudinal spot migration of 0.22+/-0.03 in phase within a year. This movement is probably an artifact caused by a difference between the accepted rotation period and the real photometric period for these years. If this is true, then the photometric rotation period for these years is 2.4037+/-0.0005 days. Measurements from these four years and six maps limit the surface differential rotation to alpha=0.0001+/-0.0002, where alpha is the difference between polar and equatorial angular velocities relative to the equatorial angular velocity.

Affiliated with

Also associated with

No associations

Rating

Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997 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 Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-574674