The rotation–activity relation of M dwarfs: from K2 to TESS and PLATO

Stefanie Raetz; Beate Stelzer; Alexander Scholz

doi:10.1002/asna.202013727

The rotation–activity relation of M dwarfs: from K2 to TESS and PLATO

Stefanie Raetz, Beate Stelzer, Alexander Scholz

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Abstract

Studies of the rotation–activity relation of late‐type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation–activity relation with K2 for M dwarfs, where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper motion catalog that were in the K2 field of view. Using a sample of 430 M dwarfs observed in campaigns C0–C19 in long‐cadence mode, we determined the rotation period and a wealth of activity diagnostics. Our study of the rotation–activity relation based on photometric activity indicators confirmed the previously published abrupt change of the activity level at a rotation period of ∼10 days. Our sample, which is more than three times larger, increases the statistical significance of this finding.

Original language	English
Pages (from-to)	519-556
Journal	Astronomische Nachrichten
Volume	341
Issue number	5
Early online date	25 Jun 2020
DOIs	https://doi.org/10.1002/asna.202013727
Publication status	Published - 27 Aug 2020

Keywords

Stars: late-type
Stars: activity
Stars: rotation
Stars: flare

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Raetz-2020-Rotation-activity-relation-AN-AAM
Copyright © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/asna.202013727.
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https://arxiv.org/abs/2005.08688

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title = "The rotation–activity relation of M dwarfs: from K2 to TESS and PLATO",

abstract = "Studies of the rotation–activity relation of late‐type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation–activity relation with K2 for M dwarfs, where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper motion catalog that were in the K2 field of view. Using a sample of 430 M dwarfs observed in campaigns C0–C19 in long‐cadence mode, we determined the rotation period and a wealth of activity diagnostics. Our study of the rotation–activity relation based on photometric activity indicators confirmed the previously published abrupt change of the activity level at a rotation period of ∼10 days. Our sample, which is more than three times larger, increases the statistical significance of this finding.",

keywords = "Stars: late-type, Stars: activity, Stars: rotation, Stars: flare",

author = "Stefanie Raetz and Beate Stelzer and Alexander Scholz",

year = "2020",

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doi = "10.1002/asna.202013727",

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TY - JOUR

T1 - The rotation–activity relation of M dwarfs

T2 - from K2 to TESS and PLATO

AU - Raetz, Stefanie

AU - Stelzer, Beate

AU - Scholz, Alexander

PY - 2020/8/27

Y1 - 2020/8/27

N2 - Studies of the rotation–activity relation of late‐type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation–activity relation with K2 for M dwarfs, where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper motion catalog that were in the K2 field of view. Using a sample of 430 M dwarfs observed in campaigns C0–C19 in long‐cadence mode, we determined the rotation period and a wealth of activity diagnostics. Our study of the rotation–activity relation based on photometric activity indicators confirmed the previously published abrupt change of the activity level at a rotation period of ∼10 days. Our sample, which is more than three times larger, increases the statistical significance of this finding.

AB - Studies of the rotation–activity relation of late‐type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation–activity relation with K2 for M dwarfs, where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper motion catalog that were in the K2 field of view. Using a sample of 430 M dwarfs observed in campaigns C0–C19 in long‐cadence mode, we determined the rotation period and a wealth of activity diagnostics. Our study of the rotation–activity relation based on photometric activity indicators confirmed the previously published abrupt change of the activity level at a rotation period of ∼10 days. Our sample, which is more than three times larger, increases the statistical significance of this finding.

KW - Stars: late-type

KW - Stars: activity

KW - Stars: rotation

KW - Stars: flare

U2 - 10.1002/asna.202013727

DO - 10.1002/asna.202013727

M3 - Article

SN - 0004-6337

VL - 341

SP - 519

EP - 556

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

IS - 5

ER -

The rotation–activity relation of M dwarfs: from K2 to TESS and PLATO

Abstract

Keywords

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