J/ApJ/818/43 Stellar surface gravity measures of KIC stars (Bastien+, 2016)
A granulation "flicker"-based measure of stellar surface gravity.
Bastien F.A., Stassun K.G., Basri G., Pepper J.
<Astrophys. J., 818, 43 (2016)>
=2016ApJ...818...43B 2016ApJ...818...43B (SIMBAD/NED BibCode)
ADC_Keywords: Effective temperatures ; Stars, nearby
Keywords: stars: fundamental parameters; stars: general; stars: solar-type;
techniques: photometric
Abstract:
In our previous work we found that high-quality light curves, such as
those obtained by Kepler, may be used to measure stellar surface
gravity via granulation-driven light curve "flicker" (F8). Here, we
update and extend the relation originally presented by Bastien et al.
(2013Natur.500..427B 2013Natur.500..427B) after calibrating F8 against a more robust set
of asteroseismically derived surface gravities. We describe in detail
how we extract the F8 signal from the light curves, including how we
treat phenomena, such as exoplanet transits and shot noise, that
adversely affect the measurement of F8. We examine the limitations
of the technique, and, as a result, we now provide an updated
treatment of the F8-based log g error. We briefly highlight further
applications of the technique, such as astrodensity profiling or its
use in other types of stars with convective outer layers. We discuss
potential uses in current and upcoming space-based photometric
missions. Finally, we supply F8-based log g values, and their
uncertainties, for 27628 Kepler stars not identified as hosts of
transiting planets, with 4500K<Teff<7150K, 2.5<logg<4.6, Kp≤13.5,
and overall photometric amplitudes <10 parts per thousand.
Description:
In our analysis we use all quarters from the Kepler mission except for
Q0, and we only use the long-cadence light curves. Additionally, we
only use the Pre-search Data Conditioning, Maximum A Posteriori
(PDC-MAP) light curves, as further discussed in Section 3.4.1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 54 27628 Flicker gravities for 27628 Kepler stars
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)
J/ApJS/210/20 : Small Kepler planets radial velocities (Marcy+, 2014)
J/ApJS/210/19 : Kepler planetary candidates. IV. 22 months (Burke+, 2014)
J/ApJ/781/124 : Granulation model for 508 KIC stars (Cranmer+, 2014)
J/AJ/147/45 : Kepler mission IV. Eclipse times (Conroy+, 2014)
J/ApJS/210/1 : Asteroseismic study of solar-type stars (Chaplin+, 2014)
J/MNRAS/436/1883 : Properties of KOI host stars (Walkowicz+, 2013)
J/A+A/560/A4 : Rotation periods of active Kepler stars (Reinhold+, 2013)
J/A+A/557/L10 : Rotation periods of 12000 Kepler stars (Nielsen+, 2013)
J/ApJ/770/69 : Kepler planet candidates radii (Petigura+, 2013)
J/ApJ/767/127 : Asteroseismic solutions for 77 Kepler stars (Huber+, 2013)
J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)
J/ApJS/199/30 : Effective temperature for KIC stars (Pinsonneault+, 2012)
J/A+A/543/A160 : Normalized spectra of 82 Kepler red giants (Thygesen+, 2012)
J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)
J/MNRAS/423/122 : Abundances of 93 solar-type Kepler targets (Bruntt+, 2012)
J/other/Nat/485.478 : Superflares on solar-type stars (Maehara+, 2012)
J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)
J/AJ/141/50 : White-light flares on cool Kepler stars (Walkowicz+, 2011)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Kepler identifier
10- 15 F6.3 mag Kpmag [6.9/13.5] Magnitude in Kepler band (1)
17- 21 F5.3 [cm/s2] loggF8 [2.5/4.9] Surface Gravity from
granulation-driven 8hr light curve flicker
23- 27 F5.3 [cm/s2] E_loggF8 [0.1/0.7] Error on logg in the upward
(main sequence) direction
29- 33 F5.3 [cm/s2] e_loggF8 [0.1/0.7] Error on logg in the downward
(red giant) direction
35- 39 F5.3 --- Range [0.01/10] Range between the 5th and 95th
percentile of sorted Kepler light curve,
corrected for Kpmag (2)
41- 45 F5.3 --- RMS [0.002/0.9]? RMS value in a 16-point (8hr) box
car smoothing of the Kepler light curve (2)
47- 49 A3 --- f_RMS [NaN] NaN: spurious data (3)
51- 54 I4 K Teff [4500/7149] Effective Surface Temperature (4)
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Note (1): From the Kepler Input Catalog (Cat. V/133)
Note (2): As described in Bastien et al. (2013Natur.500..427B 2013Natur.500..427B)
Note (3): See section 2.2.1 for further explanations.
Note (4): Teff from Huber et al. 2014, J/ApJS/211/2
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 27-Apr-2016