J/ApJ/829/23 Stellar flares from Q0-Q17 Kepler LCs (Davenport, 2016)
The Kepler catalog of stellar flares.
Davenport J.R.A.
<Astrophys. J., 829, 23-23 (2016)>
=2016ApJ...829...23D 2016ApJ...829...23D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, flare ; Stars, masses ; Photometry
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 851168 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 ∼1035erg. 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.
Description:
For this study I analyzed every available long- and short-cadence
light curve from the primary Kepler mission, obtaining the most
recently available version of the Quarter 0-17 (May 2009-Apr 2013)
light curves, known as Data Release 24.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 70 4041 Summary statistics for the final 4041 flare
star sample
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/224/37 : White-light flares on close binaries from Kepler (Gao+, 2016)
J/ApJS/224/12 : Kepler planetary candidates. VII. 48-month (Coughlin+, 2016)
J/ApJ/822/86 : False positive proba. for Q1-Q17 DR24 KOIs (Morton+, 2016)
J/ApJ/814/35 : Flare events in M dwarf of M37 (Chang+, 2015)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/A+A/560/A4 : Rotation periods of active Kepler stars (Reinhold+, 2013)
J/ApJS/209/5 : Superflares of Kepler stars. I. (Shibayama+, 2013)
J/ApJS/207/35 : Kepler pipeline signal-to-noise studies (Christiansen+, 2013)
J/ApJS/207/15 : M dwarf flare spectra (Kowalski+, 2013)
J/other/Nat/485.478 : Superflares on solar-type stars (Maehara+, 2012)
J/ApJ/743/48 : Stellar rotation periods & X-ray luminosities (Wright+, 2011)
J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)
J/AJ/141/50 : White-light flares on cool Kepler stars (Walkowicz+, 2011)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)
J/A+A/397/147 : Activity-rotation relationship in stars (Pizzolato+ 2003)
http://archive.stsci.edu/kepler/ : MAST Kepler home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC [757099/12885086] Kepler Input Catalog Number
10- 15 F6.3 mag g-i [-0.9/5]? g-i color index, from the KIC
17- 20 F4.2 Msun Mass [0.1/1.9]? Isochrone derived stellar mass
22- 28 F7.3 d Prot [0.2/39]?=-99 Rotation period,
from McQuillan+ (2014, J/ApJS/211/24)
30- 34 I5 --- Nfl [100/17647] Number of flares
36- 39 I4 --- Nfl68 [11/7989] Number of flares, above local 68%
completeness threshold
41- 48 E8.3 --- Lfl/Lkp [0/0.201] Total fractional flare luminosity
in the Kepler bandpass
50- 57 E8.3 --- e_Lfl/Lkp [0/0.0002] Uncertainty in LflLkep
59- 63 F5.2 --- alpha [-7.5/0] α FFD power-law fit coefficient (1)
65- 70 F6.2 --- beta [0/263] β FFD power-law fit coefficient (1)
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Note (1): FFD = Flare Frequency Distribution (e.g., Lacy+ 1976ApJS...30...85L 1976ApJS...30...85L);
see section 5.2 for further explanations.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Dec-2016