J/ApJS/199/30 Effective temperature scale for KIC stars (Pinsonneault+, 2012)
A revised effective temperature scale for the Kepler Input Catalog. Pinsonneault M.H., An D., Molenda-Zakowicz J., Chaplin W.J., Metcalfe T.S., Bruntt H. <Astrophys. J. Suppl. Ser., 199, 30 (2012)> =2012ApJS..199...30P
ADC_Keywords: Effective temperatures ; Abundances, [Fe/H] ; Stars, double and multiple Keywords: stars: fundamental parameters Abstract: We present a catalog of revised effective temperatures for stars observed in long-cadence mode in the Kepler Input Catalog (KIC). We use Sloan Digital Sky Survey (SDSS) griz filters tied to the fundamental temperature scale. Polynomials for griz color-temperature relations are presented, along with correction terms for surface gravity effects, metallicity, and statistical corrections for binary companions or blending. We compare our temperature scale to the published infrared flux method (IRFM) scale for VTJKs in both open clusters and the Kepler fields. We find good agreement overall, with some deviations between (J-Ks)-based temperatures from the IRFM and both SDSS filter and other diagnostic IRFM color-temperature relationships above 6000K. For field dwarfs, we find a mean shift toward hotter temperatures relative to the KIC, of order 215K, in the regime where the IRFM scale is well defined (4000K to 6500K). This change is of comparable magnitude in both color systems and in spectroscopy for stars with Teff below 6000K. Systematic differences between temperature estimators appear for hotter stars, and we define corrections to put the SDSS temperatures on the IRFM scale for them. When the theoretical dependence on gravity is accounted for, we find a similar temperature scale offset between the fundamental and KIC scales for giants. We demonstrate that statistical corrections to color-based temperatures from binaries are significant. Typical errors, mostly from uncertainties in extinction, are of order 100K. Description: We took griz photometry from long-cadence targets in the Kepler Input Catalog (KIC) (Brown et al. 2011AJ....142..112B, see Cat. V/133); photometric uncertainties were taken as 0.01mag in gri and 0.03mag in z. Errors were taken from the quadrature sum of uncertainties in the individual filters. JHKs photometry was taken from the All Sky Data Release of the 2MASS Point Source Catalog (Skrutskie et al. 2006, Cat. VII/233) and checked against complementary information in the KIC itself. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table7.dat 63 161977 Catalog with revised Teff table9.dat 63 7912 Tycho-2MASS-based IR-flux method (IRFM) Teff
See also: II/306 : The SDSS Photometric Catalog, Release 8 (Adelman-McCarthy+, 2011) V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011) J/MNRAS/412/1210 : Kepler asteroseismic targets (Molenda-Zakowicz+, 2011) J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010) J/ApJ/700/523 : Galactic star clusters in SDSS. II. Colors. (An+, 2009) J/ApJ/546/1006 : VRI photometry of M35 (Barrado y Navascues+, 2001) J/A+AS/130/65 : A standard stellar library. II. (Lejeune+ 1998) J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997) J/AJ/106/181 : CCD photometry of open cluster M67 (Montgomery+ 1993) http://www.ipac.caltech.edu/2mass/ : 2MASS home page at IPAC Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 8 I8 --- KIC Unique KIC catalog identification 10- 14 I5 K Te(S) ?=-9999 SDSS derived effective temperature (1) 16- 19 I4 K e_Te(S) ?=0 Total uncertainty in Te(S) 21- 24 I4 K E_Te(S) ?=0 Random uncertainty in Te(S) 26- 30 I5 K Te(I) ?=-9999 IRFM derived effective temperature (2) 32- 34 I3 K e_Te(I) ?=0 Total uncertainty in Te(I) 36- 38 I3 K E_Te(I) ?=0 Random uncertainty in Te(I) 40- 44 I5 K Te(K) KIC derived effective temperature 46- 50 F5.2 [cm/s2] log(g) KIC derived log gravity 52- 56 F5.2 [-] [Fe/H] KIC derived [Fe/H] 58- 61 I4 K Te.c [0/1020] Effective temperature correction (3) 63 I1 --- Q [0/1] Quality flag, 0=good (4)
Note (1): Computed at a fixed [Fe/H]=-0.2. Note (2): IRFM (infrared flux method) estimation based on (J-Ks) using the original formula in C10 at [Fe/H]=-0.2. Note (3): Correction factor for giants that has been subtracted from Te(S) estimate. Note (4): If the flag is set (=1), Te(S) estimates should be taken with care (see Section 4.2.4).
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 8 I8 --- KIC Unique KIC catalog identification 10- 14 I5 K Te(V-J) ?=-9999 Effective temperature from (V_T_-J) (1) 16- 18 I3 K e_Te(V-J) ?=0 Total uncertainty in Te(V-J) 20- 22 I3 K E_Te(V-J) ?=0 Random uncertainty in Te(V-J) 24- 28 I5 K Te(V-H) ?=-9999 Effective temperature from (V_T_-H) (1) 30- 32 I3 K e_Te(V-H) ?=0 Total uncertainty in Te(V-H) 34- 36 I3 K E_Te(V-H) ?=0 Random uncertainty in Te(V-H) 38- 42 I5 K Te(V-K) ?=-9999 Effective temperature from (VT-KS) (1) 44- 46 I3 K e_Te(V-K) ?=0 Total uncertainty in Te(V-K) 48- 50 I3 K E_Te(V-K) ?=0 Random uncertainty in Te(V-K) 52- 55 I4 K Te(J-K) Effective temperature from (J-K_S_) (1) 57- 59 I3 K e_Te(J-K) Total uncertainty in Te(J-K) 61- 63 I3 K E_Te(J-K) Random uncertainty in Te(J-K)
Note (1): Computed at a fixed [Fe/H]=-0.2.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 14-Jun-2012
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