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Starspot variability and evolution from modeling Kepler photometry of active late-type stars
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2011 (English)In: IAU Symposium 273 (The Physics of Sun and Star Spots), 2011, Vol. 273, 78-82 p.Conference paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
2011. Vol. 273, 78-82 p.
, Proceedings of the International Astronomical Union, 6
Keyword [en]
Stars:spots, stars:activity, stars:rotation, stars: late-type
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-170199DOI: 10.1017/S1743921311015043OAI: oai:DiVA.org:uu-170199DiVA: diva2:508559
IAU Symposium S273
Available from: 2012-03-09 Created: 2012-03-09 Last updated: 2012-10-11

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Piskunov, Nikolai
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Observational Astronomy
Astronomy, Astrophysics and Cosmology

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