Doppler imaging of LQ Hydrae for 1998-2002
Research output: Contribution to journal › Article
Methods. We apply the Doppler imaging technique on photospheric spectral lines using an inversion code to retrieve images of the surface temperature.
Results. We present new temperature maps using multiple spectral lines for a total of 7 seasons.
Conclusions. We find no evidence for active longitudes persisting over multiple observing seasons. The spot activity appears to be concentrated to two latitude regions. Using the currently accepted rotation period, we find spot structures to show a trend in the phase-time plot, indicative of a need for a longer period. We conclude that the long-term activity of LQ Hya is more chaotic than that of some magnetically active binary stars analyzed with similar methods, but still with clear indications of an activity cycle from the photometry.
|Number of pages||9|
|Journal||Astronomy and Astrophysics|
|Publication status||Published - 2015|
|MoE publication type||A1 Journal article-refereed|