Abstract
In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699, An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al.. and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.
| Original language | English |
|---|---|
| Pages (from-to) | 666-672 |
| Number of pages | 7 |
| Journal | Monthly Notices of the Royal Astronomical Society (MNRAS) |
| Volume | 331 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 11 Apr 2002 |
Keywords
- methods : data analysis
- stars : activity
- stars : imaging
- stars : individual : He 699
- stars : late-type
- stars : spots
- ALPHA-PERSEI CLUSTER
- LOW-MASS STARS
- ROTATIONAL VELOCITIES
- MAIN-SEQUENCE
- G-DWARFS
- EVOLUTION
- ALGORITHM
- PLEIADES
- IMAGES