Differential rotation of LQ Hya and IL Hya from a time-series of Doppler images

Z. Kővári, M. Weber, K. G. Strassmeier

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A technique of detecting differential rotation from time-series Doppler images is introduced and applied to LQ Hya and IL Hya. Fitting the cross-correlation pattern subtracted from a series of cross-correlated consecutive Doppler images, for the rapidly rotating K2 dwarf LQ Hya we find a weak (α = 0.0057) equatorial acceleration. A possible solar-type differential rotation is found on the giant component of the RS CVn-type IL Hya with α = 0.017.

Original languageEnglish
Title of host publicationEuropean Space Agency, (Special Publication) ESA SP
EditorsF. Favata, G.A.J. Hussain, B. Battrick
Pages731-734
Number of pages4
Edition560 II
Publication statusPublished - 2005
Event13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - Hamburg, Germany
Duration: Jul 5 2004Jul 9 2004

Other

Other13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun
CountryGermany
CityHamburg
Period7/5/047/9/04

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Time series

Keywords

  • Stars: activity of
  • Stars: imaging
  • Stars: individual: IL Hya
  • Stars: individual: LQ Hya
  • Stars: latetype
  • Starspots

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Kővári, Z., Weber, M., & Strassmeier, K. G. (2005). Differential rotation of LQ Hya and IL Hya from a time-series of Doppler images. In F. Favata, G. A. J. Hussain, & B. Battrick (Eds.), European Space Agency, (Special Publication) ESA SP (560 II ed., pp. 731-734)

Differential rotation of LQ Hya and IL Hya from a time-series of Doppler images. / Kővári, Z.; Weber, M.; Strassmeier, K. G.

European Space Agency, (Special Publication) ESA SP. ed. / F. Favata; G.A.J. Hussain; B. Battrick. 560 II. ed. 2005. p. 731-734.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kővári, Z, Weber, M & Strassmeier, KG 2005, Differential rotation of LQ Hya and IL Hya from a time-series of Doppler images. in F Favata, GAJ Hussain & B Battrick (eds), European Space Agency, (Special Publication) ESA SP. 560 II edn, pp. 731-734, 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, Hamburg, Germany, 7/5/04.
Kővári Z, Weber M, Strassmeier KG. Differential rotation of LQ Hya and IL Hya from a time-series of Doppler images. In Favata F, Hussain GAJ, Battrick B, editors, European Space Agency, (Special Publication) ESA SP. 560 II ed. 2005. p. 731-734
Kővári, Z. ; Weber, M. ; Strassmeier, K. G. / Differential rotation of LQ Hya and IL Hya from a time-series of Doppler images. European Space Agency, (Special Publication) ESA SP. editor / F. Favata ; G.A.J. Hussain ; B. Battrick. 560 II. ed. 2005. pp. 731-734
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