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Starspot variability and evolution from modeling Kepler photometry of active late-type stars
- Brown, A. (author)
- Korhonen, H. (author)
- Berdyugina, S. (author)
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- Tofany, B. (author)
- Ayres, T. R. (author)
- Kowalski, A. (author)
- Hawley, S. (author)
- Harper, G. (author)
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- (creator_code:org_t)
- 2011
- 2011
- English.
- In: IAU Symposium 273 (The Physics of Sun and Star Spots). ; , s. 78-82
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- The Kepler satellite provides a unique opportunity to study the detailed optical photometric variability of late-type stars with unprecedentedly long (several year) continuous monitoring and sensitivity to very small-scale variations. We are studying a sample of over two hundred cool (mid-A - late-K spectral type) stars using Kepler long-cadence (30 minute sampling) observations. These stars show a remarkable range of photometric variability, but in this paper we concentrate on rotational modulation due to starspots and flaring. Modulation at the 0.1% level is readily discernable. We highlight the rapid timescales of starspot evolution seen on solar-like stars with rotational periods between 2 and 7 days.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Stars:spots
- stars:activity
- stars:rotation
- stars: late-type
Publication and Content Type
- ref (subject category)
- kon (subject category)
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- Brown, A.
- Korhonen, H.
- Berdyugina, S.
- Tofany, B.
- Ayres, T. R.
- Kowalski, A.
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- Hawley, S.
- Harper, G.
- Piskunov, Nikola ...
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- Uppsala University
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