J/ApJS/224/2 K2 EPIC stellar properties for 138600 targets (Huber+, 2016)
The K2 Ecliptic Plane Input Catalog (EPIC) and stellar classifications of
138600 targets in campaigns 1-8.
Huber D., Bryson S.T., Haas M.R., Barclay T., Barentsen G., Howell S.B.,
Sharma S., Stello D., Thompson S.E.
<Astrophys. J. Suppl. Ser., 224, 2 (2016)>
=2016ApJS..224....2H 2016ApJS..224....2H (SIMBAD/NED BibCode)
ADC_Keywords: Abundances, [Fe/H] ; Stars, masses ; Stars, diameters ;
Stars, distances ; Surveys
Keywords: catalogs; planetary systems; proper motions;
stars: fundamental parameters; stars: late-type;
techniques: photometric
Abstract:
The K2 Mission uses the Kepler spacecraft to obtain high-precision
photometry over ∼80 day campaigns in the ecliptic plane. The Ecliptic
Plane Input Catalog (EPIC) provides coordinates, photometry, and
kinematics based on a federation of all-sky catalogs to support target
selection and target management for the K2 mission. We describe the
construction of the EPIC, as well as modifications and shortcomings of
the catalog. Kepler magnitudes (Kp) are shown to be accurate to
∼0.1mag for the Kepler field, and the EPIC is typically complete to
Kp∼17 (Kp∼19 for campaigns covered by Sloan Digital Sky Survey). We
furthermore classify 138600 targets in Campaigns 1-8 (∼88% of the full
target sample) using colors, proper motions, spectroscopy, parallaxes,
and galactic population synthesis models, with typical uncertainties
for G-type stars of ∼3% in Teff, ∼0.3dex in logg∼40% in radius, ∼10%
in mass, and ∼40% in distance. Our results show that stars targeted by
K2 are dominated by K-M dwarfs (∼41% of all selected targets), F-G
dwarfs (∼36%), and K giants (∼21%), consistent with key K2 science
programs to search for transiting exoplanets and galactic archeology
studies using oscillating red giants. However, we find significant
variation of the fraction of cool dwarfs with galactic latitude,
indicating a target selection bias due to interstellar reddening and
increased contamination by giant stars near the galactic plane. We
discuss possible systematic errors in the derived stellar properties,
and differences with published classifications for K2 exoplanet host
stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 215 138600 Stellar properties of K2 targets
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See also:
II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
III/272 : RAVE 4th data release (Kordopatis+, 2013)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
I/297 : NOMAD Catalog (Zacharias+ 2005)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
J/MNRAS/456/2260 : K2 Variability Catalogue II (Armstrong+, 2016)
J/ApJS/222/14 : Planetary cand. from 1st yr K2 mission (Vanderburg+, 2016)
J/MNRAS/452/4283 : 33 RR Lyrae observed in Pisces with K2-E2 (Molnar+, 2015)
J/MNRAS/452/3561 : Kepler eclipsing binary stars. K2 C0 (LaCourse+, 2015)
J/A+A/579/A19 : K2 Variable Catalogue (Armstrong+, 2015)
J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)
J/ApJS/215/19 : APOKASC catalog of Kepler red giants (Pinsonneault+, 2014)
J/ApJ/787/110 : SAGA: Stromgren data of seismic KIC stars (Casagrande+, 2014)
J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)
J/ApJ/767/127 : Asteroseismic solutions for 77 Kepler stars (Huber+, 2013)
J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)
J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)
J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)
J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)
J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)
J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/ApJ/728/48 : Multicolor eclipse data for 6 new binaries (Kraus+, 2011)
J/MNRAS/384/1178 : 2MASS, SDSS and BVRI photometry for 825 stars (Bilir+, 2008)
J/AN/326/321 : Absolute magnitudes for late-type dwarfs (Bilir+, 2005)
J/A+AS/141/371 : Low-mass stars evolutionary tracks+isochrones (Girardi+, 2000)
http://archive.stsci.edu/k2/catalogs.html : K2 catalogs on MAST
http://keplerscience.arc.nasa.gov/ : Kepler & K2 Science Center
http://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archive
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- EPIC K2 Identifier
11- 15 I5 K Teff [1708/16022] Inferred Stellar Effective
Temperature (1)
17- 20 I4 K E_Teff [20/5234] Upper uncertainty on Teff (1)
22- 25 I4 K e_Teff Lower uncertainty on Teff (1)
27- 32 F6.3 [cm/s2] logg [-0.9/5.4] Inferred Log Surface Gravity (1)
34- 38 F5.3 [cm/s2] E_logg [0.02/5] Upper uncertainty on logg (1)
40- 44 F5.3 [cm/s2] e_logg Lower uncertainty on logg (1)
46- 51 F6.3 [Sun] [Fe/H] [-3.5/1] Inferred Metallicity relative
to the Sun (1)
53- 57 F5.3 [Sun] E_[Fe/H] [0.05/3] Upper uncertainty on Fe/H (1)
59- 63 F5.3 [Sun] e_[Fe/H] Lower uncertainty on Fe/H (1)
65- 71 F7.3 Rsun Rad [0.08/532] Inferred Stellar Radius (1)
73- 79 F7.3 Rsun E_Rad [0.002/300] Upper uncertainty on Rad (1)
81- 87 F7.3 Rsun e_Rad Lower uncertainty on Rad (1)
89- 93 F5.3 Msun Mass [0.07/6.1] Inferred Mass (1)
95- 99 F5.3 Msun E_Mass [0.001/2.2] Upper uncertainty on Mass (1)
101-105 F5.3 Msun e_Mass Lower uncertainty on Mass (1)
107-115 E9.3 Sun rho [0/102.5] Inferred Density relative to
the Sun (1)
117-125 E9.3 Sun E_rho Upper uncertainty on rho (1)
127-135 E9.3 Sun e_rho Lower uncertainty on rho (1)
137-145 E9.3 pc Dist [2.9/102700] Inferred Distance (1)
147-155 E9.3 pc E_Dist [0.08/482600] Upper uncertainty on Dist (1)
157-165 E9.3 pc e_Dist [0.08/482600] Lower uncertainty on Dist (1)
167-173 F7.4 mag E(B-V) [0/12.8] Inferred E(B-V) reddening (1)
175-180 F6.4 mag E_E(B-V) [0/3.7] Upper uncertainty on E(B-V) (1)
182-187 F6.4 mag e_E(B-V) Lower uncertainty on E(B-V) (1)
189-191 A3 --- Flag Classification Flags (2)
193-203 F11.7 deg RAdeg Right ascension (J2000) from EPIC catalog (3)
205-215 F11.7 deg DEdeg Declination (J2000) from EPIC catalog (3)
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Note (1): Reported values are the posterior median and 1σ confidence
interval around the median.
Note (2): Flags indicate which observables were used to derive the
classification:
hip = Hipparcos parallax + colors;
apo = APOGEE spectroscopic classification;
rav = RAVE spectroscopic classification;
lam = LAMOST spectroscopic classification;
rpm = reduced proper motions + colors;
col = colors only.
Note (3): Columns added by CDS from http://archive.stsci.edu/k2/catalogs.html
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Jun-2016