Differential rotation of LQ Hya and IL Hya from Doppler imaging

Details Differential rotation of LQ Hya and IL Hya from Doppler imaging Differential rotation of LQ Hya and IL Hya from Doppler imaging

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004padeu..14..221k&link_type=abstract

In: Proceedings of the British-Hungarian N+N Workshop for Young Researchers On Computer processing and use of satellite data in

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

We introduce two techniques of detecting surface differential rotation on stars, cross-correlation of consecutive Doppler images and the sheared-image method. We test the methods using artificial and real data. As a result, for the rapidly rotating K2 dwarf LQ Hya we find an almost rigid rotation, with weak (alpha=0.0056) equatorial acceleration. On the giant component of the RS CVn-type star IL Hya we detect solar-type differential rotation with alpha=0.03.

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