Differential rotation on the young solar analogue V889 Herculis

Details Differential rotation on the young solar analogue V889 Herculis Differential rotation on the young solar analogue V889 Herculis

2010-10-18

arxiv.org/abs/1010.3511v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 2 figure, 1 table; talk at the IAU Symposium 273 "Physics of Sun and Star Spots", Eds. D. P. Choudhary and K. G. Stra

Scientific paper

V889 Herculis is one of the brightest single early-G type stars, a young Sun, that is rotating fast enough (P_rot =1.337 days) for mapping its surface by Doppler Imaging. The 10 FOCES spectra collected between 13-16 Aug 2006 at Calar Alto Observatory allowed us to reconstruct one single Doppler image for two mapping lines. The FeI-6411 and CaI-6439 maps, in a good agreement, revealed an asymmetric polar cap and several weaker features at lower latitudes. Applying the sheared-image method with our Doppler reconstruction we perform an investigation to detect surface differential rotation (DR). The resulting DR parameter, deltaOmega/Omega~0.009 of solar type, is compared to previous studies which reported either much stronger shear or comparably weak DR, or just preferred rigid rotation. Theoretical aspects are also considered and discussed.

Affiliated with

Also associated with

No associations

Rating

Differential rotation on the young solar analogue V889 Herculis 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 Differential rotation on the young solar analogue V889 Herculis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential rotation on the young solar analogue V889 Herculis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-305423