Doppler imaging stars with moderate rotation - The SPOT distribution on Sigma Geminorum

Details Doppler imaging stars with moderate rotation - The SPOT distribution on Sigma Geminorum Doppler imaging stars with moderate rotation - The SPOT distribution on Sigma Geminorum

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...410..777h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 410, no. 2, p. 777-784.

Other

27

Starspots, Stellar Rotation, Light Curve, Stellar Spectra

Scientific paper

It is demonstrated that the Doppler imaging technique is capable of recovering the cool spot distributions on stars rotating as slowly as 15 km/s. The technique is employed to derive the spot distribution on the RS CVn star Sigma Gem. The spot distribution on this star consists of five spots which are in a band centered near latitude + 55 deg and which may be indicative of an active latitude band. Although Sigma Gem exhibits high-latitude spot activity, it shows no evidence for a polar spot like those seen on virtually every other RS CVn star. The different spot morphology of Sigma Gem may be due to the long period of the star.

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