SIMBAD references

2007A&A...474..165K - Astronomy and Astrophysics, volume 474165-168 (2007/10-4)

Anti-solar differential rotation on the active K-giant σ Geminorum.

KHOVARI Z., BARTUS J., STRASSMEIER K.G., VIDA K., SVANDA M. and OLAH K.

Abstract (from CDS):

The active K1 giant σ Gem and its differential surface rotation is revisited. We refine our previous inconclusive result by recovering the spot migration pattern of this long-period RSCVn-type binary through application of the technique of ``average cross-correlation of contiguous Doppler images'' to a set of six Doppler images from 3.6 consecutive rotation cycles. We find an anti-solar differential rotation law with a shear of α≃-0.022±0.006. We also find evidence of a poleward migration trend of spots with an average velocity of ≃300m/s.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - stars: imaging - stars: late-type - stars: starspots - stars: individual: σ Geminorum

Simbad objects: 12

Full paper

View the references in ADS

To bookmark this query, right click on this link: simbad:2007A&A...474..165K and select 'bookmark this link' or equivalent in the popup menu