J/ApJS/244/37 Kepler flare star parameters from DR25 (Goodarzi+, 2019)
Flare activity and magnetic feature analysis of the flare stars.
Goodarzi H., Mehrabi A., Khosroshahi H.G., He H.
<Astrophys. J. Suppl. Ser., 244, 37 (2019)>
=2019ApJS..244...37G 2019ApJS..244...37G
ADC_Keywords: Stars, flare
Keywords: methods: data analysis ; stars: activity ; stars: flare ;
stars: magnetic field ; stars: rotation ; stars: starspots
Abstract:
We analyze the light curve of 1740 flare stars to study the
relationship between the magnetic feature characteristics and the
identified flare activity. Coverage and stability of magnetic features
are inspired by rotational modulation of light-curve variations and
flare activity of stars are obtained using our automated flare
detection algorithm. The results show that: (i) the flare time
occupation ratio (or flare frequency) and the total power of flares
increase by increasing relative magnetic feature coverage and contrast
in F-M-type stars; (ii) magnetic feature stability is highly
correlated with the coverage and the contrast of the magnetic
structures, as this is the case for the Sun; and (iii) stability,
coverage, and contrast of the magnetic features, time occupation
ratio, and total power of flares increases for G-, K-, and M-type
stars by decreasing the Rossby number due to the excess of the
produced magnetic field from dynamo procedure until reaching to the
saturation level.
Description:
We use long-cadence pre-search data conditioning (PDC) from
Kepler Q2-Q16 (June 2009-Jan 2013).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 174 1743 Parameters of Kepler flare stars
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See also:
V/133 : Kepler Input Catalog (Kepler, 2009)
J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)
J/AJ/141/50 : White-light flares on cool Kepler stars (Walkowicz+, 2011)
J/ApJ/743/48 : Stars with rot. periods & X-ray luminosities (Wright+, 2011)
J/other/Nat/485.478 : Superflares on solar-type stars (Maehara+, 2012)
J/ApJS/209/5 : Superflares of Kepler stars. I. (Shibayama+, 2013)
J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/MNRAS/447/2714 : Flare stars across the H-R diagram (Balona+, 2015)
J/ApJ/829/23 : Stellar flares from Q0-Q17 Kepler LCs (Davenport, 2016)
J/AJ/152/158 : Final Kepler transiting pl. search (DR25) (Twicken+, 2016)
J/ApJ/834/207 : Periodicity & magnitude of Kepler LCs (Mehrabi+, 2017)
J/ApJ/851/116 : Long-term var. of Kepler sun-like stars (Montet+, 2017)
J/ApJS/229/30 : Revised properties of Q1-17 Kepler targets (Mathur+, 2017)
J/ApJS/232/26 : Catalog of Kepler flare stars (Van Doorsselaere+, 2017)
J/ApJS/235/38 : Kepler pl. cand. VIII. DR25 reliability (Thompson+, 2018)
J/ApJ/866/99 : Revised radii of KIC stars using Gaia DR2 (Berger+, 2018)
J/ApJS/241/2 : Ionization profiles of Galactic HII regions (Luisi+, 2019)
J/ApJS/241/29 : Flare catalog through LC data of Kepler DR25 (Yang+, 2019)
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 [757099/12784183] KIC number (1)
10- 15 F6.3 d Prot [0.2/44.8] Rotation period of the star (2)
17- 31 F15.13 --- iac [0.069/0.43] Auto-correlation index
33- 49 F17.15 --- R [0.00015/0.11] Effective range of
light curve variation
51- 67 F17.15 --- Rf [0.00036/0.032] Time occupation ratio of flares
69- 85 E17.15 J/s Pf [6.6e+19/2.8e+23] Total power of flares
87-103 E17.15 J/s Mf [1.2e+22/3.2e+25] Average flux magnitude of
flares
105-121 F17.15 --- Thr [0.00011/0.033] Threshold value of
flare detection
123-125 I3 --- Nf [21/827] Number of flares
127-132 F6.4 Msun Mass [0.25/1.28] Mass of the star (1)
134-138 F5.3 Rsun Rad [0.17/3.44] Radius of the star (1)
140-145 F6.1 K Teff [3202/7171] Effective temperature
of the star (1)
147-151 F5.3 [cm/s2] logg [3.5/5.2] log of surface gravity (1)
153-157 F5.2 [Sun] [Fe/H] [-1.7/0.6] log of Fe/H metallicity (1)
159-174 F16.14 --- Ro [0.0052/2.12] Rossby number
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Note (1): From the Kepler Input Catalog, Huber+ (2014, J/ApJS/211/2);
http://exoplanetarchive.ipac.caltech.edu/docs/
KeplerStellarQ117_documentation.pdf
Note (2): From the rotation period catalog derived by
McQuillan+ (2014, J/ApJS/211/24).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 06-Mar-2020