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J/MNRAS/463/3513    M67 Kepler/K2-Campaign-5 variable stars  (Gonzalez, 2016)

A revised gyro-age for M67 from Kepler/K2-Campaign-5 light curves. Gonzalez G. <Mon. Not. R. Astron. Soc., 463, 3513-3519 (2016)> =2016MNRAS.463.3513G (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, variable Keywords: techniques: photometric - stars: variables: general - open clusters and associations: individual: M67 Abstract: We revisit the photometric variability of stars in the M67 field using Kepler/K2-Campaign-5 light curves. In our previous work (Gonzalez, 2016, Cat. J/MNRAS/459/1060), we limited the search area around M67 to that of a recent ground-based study. In the present work, we expand the search area and apply a more rigorous period-finding algorithm to determine the rotation periods of 98 main-sequence cluster members from the same data. In addition, we derive periods of 40 stars from the K2SC detrended light curves. We determine the mean period of single sun-like main-sequence cluster members to be 29.6±0.6d. Assuming the periods correspond to stellar rotation, the corresponding mean gyrochronological (gyro-) age is 5.4±0.2Gyr. Description: Using Kepler/K2-Campaign-5 light curves, we have per- formed an improved period analysis of M 67 member stars compared to our earlier similar study (Paper I, Gonzalez, 2016, Cat. J/MNRAS/459/1060). We found that some of the period estimates in Paper I were not true rotation periods. Our new analysis includes stars observed by Kepler over a wider area than we explored in Paper I, but, because of our more restrictive criteria in the present work, actually yields fewer rotation period determinations from the same data. In addition, we derived periods from a second K2 database containing detrended light curves. The new rotation periods are in excellent agreement with those of B16, where our samples overlap. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 68 98 Derived periods from the PDCSAP_FLUX values table2.dat 68 40 Derived periods from the K2SC light curves
See also: J/MNRAS/459/1060 : M67 variable stars from Kepler/K2-Campaign-5 (Gonzalez 2016) Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
1- 9 I9 --- EPIC K2 Input Catalog identifier 11- 15 F5.2 mag Vmag Visual magnitude 17- 20 F4.2 mag B-V B-V color index 22- 25 F4.1 d Per Period 27- 29 F3.1 d e_Per Period error 31- 35 F5.2 --- FVI Flux variability index 37- 41 F5.2 mmag Std Standard deviation of flux values 43- 47 F5.2 mmag Stdc Corrected standard deviation 49- 58 F10.6 deg RAdeg Rigth ascension (J2000.0) 60- 68 F9.6 deg DEdeg Declination (J2000.0)
History: From electronic version of the journal References: Gonzalez, Paper I 2016MNRAS.459.1060G, Cat. J/MNRAS/459/1060
(End) Patricia Vannier [CDS] 14-May-2018
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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