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J/ApJ/790/L23  Solar analogs and twins rotation by Kepler (Do Nascimento+, 2014)

Rotation periods and ages of solar analogs and solar twins revealed by the Kepler mission. Do Nascimento J.-D.Jr, Garcia R.A., Mathur S., Anthony F., Barnes S.A., Meibom S., Da Costa J.S., Castro M., Salabert D., Ceillier T. <Astrophys. J., 790, L23 (2014)> =2014ApJ...790L..23D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, G-type ; Effective temperatures ; Stars, ages ; Stars, masses Keywords: stars: evolution - stars: fundamental parameters - stars: rotation stars: solar-type - Sun: fundamental parameters Abstract: A new sample of solar analogs and twin candidates has been constructed and studied, paying particular attention to their light curves from NASA's Kepler mission. This Letter aims to assess their evolutionary status, derive their rotation and ages, and identify those which are solar analogs or solar twin candidates. We separate out the subgiants that compose a large fraction of the asteroseismic sample, and which show an increase in the average rotation period as the stars ascend the subgiant branch. The rotation periods of the dwarfs, ranging from 6 to 30 days and averaging 19 days, allow us to assess their individual evolutionary states on the main sequence and to derive their ages using gyrochronology. These ages are found to be in agreement with a correlation coefficient of r = 0.79 with independent asteroseismic ages, where available. As a result of this investigation, we are able to identify 34 stars as solar analogs and 22 of them as solar twin candidates. Description: Our sample of 75 stars consists of a seismic sample of 38 from Chaplin et al. (2014, J/ApJS/210/1), 35 additional stars selected from the Kepler Input Catalog (KIC), and 16 Cyg A and B. We selected 38 well-studied stars from the asteroseismic data with fundamental properties, including ages, estimated by Chaplin et al. (2014, J/ApJS/210/1), and with Teff and log g as close as possible to the Sun's value (5200 K < Teff < 6060 K and 3.63 < log g < 4.40). This seismic sample allows a direct comparison between gyro- and seismic-ages for a subset of eight stars. These seismic samples were observed in short cadence for one month each in survey mode. Stellar properties for these stars have been estimated using two global asteroseismic parameters and complementary photometric and spectroscopic observations as described by Chaplin et al. (2014, J/ApJS/210/1). The median final quoted uncertainties for the full Chaplin et al. (2014, J/ApJS/210/1) sample were approximately 0.020 dex in log g and 150 K in Teff. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 151 75 Rotation of solar analogs and twin candidates revealed by Kepler
See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) J/ApJ/749/152 : Asteroseismic analysis of 22 solar-type stars (Mathur+, 2012) J/MNRAS/423/122 : Abundances of 93 solar-type Kepler targets (Bruntt+, 2012) J/ApJS/210/1 : Asteroseismic study of solar-type stars (Chaplin+, 2014) J/ApJS/211/2 : Revised stellar properties of Q1-16 Kepler targets (Huber+, 2014) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Num Index number 4- 11 I8 --- KIC Kepler Input Catalog (Cat. V/133) 13- 18 F6.3 mag VMag KIC Absolute V band magnitude 20- 23 I4 K Teff Effective Temperature 25- 27 I3 K E_Teff Upper limit on Teff 29- 31 I3 K e_Teff Lower limit on Teff 33 A1 --- r_Teff Teff source flag (1) 35- 39 F5.3 [cm/s2] log(g) Log surface gravity 41- 45 F5.3 [cm/s2] E_log(g) Upper limit on log(g) 47- 51 F5.3 [cm/s2] e_log(g) Lower limit on log(g) 53 A1 --- r_log(g) Log(g) source flag (1) 55- 58 F4.1 d Period Rotational Period from this paper 60- 63 F4.2 d e_Period Error in Period 65 A1 --- n_Period Determination note on Period (2) 67- 70 F4.1 Gyr Age Seismic or Isocrone Age 72- 74 F3.1 Gyr E_Age Upper limit on Age 76- 78 F3.1 Gyr e_Age Lower limit on Age 80 I1 --- r_Age Source flag on Age (2) 82- 85 F4.2 Gyr GyroAge ? Gyro age from this paper 87- 89 F3.1 Gyr e_GyroAge ? Error in GyroAge 91- 95 F5.3 10-3 F8hr ? The 8-hour flicker in parts/trillion 97-101 F5.3 10-3 e_F8hr ? Error in F8hr 103-106 F4.2 Msun MassNS Non_standard model mass from this paper 108-111 F4.2 Msun E_MassNS Upper limit on MassNS 113-116 F4.2 Msun e_MassNS Lower limit on MassNS 118-121 F4.2 Msun MassS Standard model mass 123-126 F4.2 Msun MassH Huber et al. (2014, J/ApJS/211/2) model mass 128-133 F6.3 [-] [Fe/H] Metallicity 135-139 F5.3 [-] E_[Fe/H] Upper limit on [Fe/H] 141-145 F5.3 [-] e_[Fe/H] Lower limit on [Fe/H] 147-151 A5 --- Status Star identification (3)
Note (1): Reference as follows : 1 = This paper; 3 = Chaplin et al. (2014, J/ApJS/210/1); 4 = Huber et al. (2014, J/ApJS/211/2); 5 = Metcalfe et al. (2012ApJ...748L..10M). Note (2): Note as follows : 6 = half period detected; 7 = twice period detected; 8 = low modulation; 9 = bad correction. Note (3): Status as follows : AN = Solar analog Cyg A = Cygnus A Cyg B = Cygnus B MDW = Not explained in the paper SBG = Subgiant TC = Solar twin candidate
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 16-Mar-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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