Document Type

Article

Publication Date

9-20-2016

Keywords

Stars: activity, Stars: flare

Abstract

A homogeneous search for stellar flares has been performed using every available Kepler light curve. An iterative light curve de-trending approach was used to filter out both astrophysical and systematic variability to detect flares. The flare recovery completeness has also been computed throughout each light curve using artificial flare injection tests, and the tools for this work have been made publicly available. The final sample contains 851,168 candidate flare events recovered above the 68% completeness threshold, which were detected from 4041 stars, or 1.9% of the stars in the Kepler database. The average flare energy detected is ~1035 erg. The net fraction of flare stars increases with g − i color, or decreasing stellar mass. For stars in this sample with previously measured rotation periods, the total relative flare luminosity is compared to the Rossby number. A tentative detection of flare activity saturation for low-mass stars with rapid rotation below a Rossby number of ~0.03 is found. A power-law decay in flare activity with Rossby number is found with a slope of −1, shallower than typical measurements for X-ray activity decay with Rossby number.

Publication Title

The Astrophysical Journal

Volume

829

Issue

1

First Page

23

DOI

10.3847/0004-637X/829/1/23

Required Publisher's Statement

Published 2016 September 16 • © 2016. The American Astronomical Society. All rights reserved.

Link to journal article: http://iopscience.iop.org/article/10.3847/0004-637X/829/1/23

doi:10.3847/0004-637X/829/1/23

Subjects - Topical (LCSH)

Stars--Activity; Stars--Structure; Light curves--Measurement;

Genre/Form

articles

Type

Text

Language

English

Format

application/pdf

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