J/ApJ/835/75 Common proper motion stars in the Kepler field (Janes, 2017)
Rotation periods of wide binaries in the Kepler field.
Janes K.A.
<Astrophys. J., 835, 75-75 (2017)>
=2017ApJ...835...75J 2017ApJ...835...75J (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ; Photometry
Keywords: binaries: visual; proper motions; stars: activity
Abstract:
In a search of proper motion catalogs for common proper motion stars
in the field of the Kepler spacecraft I identified 93 likely binary
systems. A comparison of their rotation periods is a test of the
gyrochronology concept. To find their periods I calculated the
autocorrelation function (ACF) of the Kepler mission photometry for
each star. In most systems for which good periods can be found, the
cooler star has a longer period than the hotter component, in general
agreement with models. However, there is a wide range in the gradients
of lines connecting binary pairs in a period-color diagram.
Furthermore, near the solar color, only a few stars have longer
periods than the Sun, suggesting that they, and their cooler
companions, are not much older than the Sun. In addition, there is an
apparent gap at intermediate periods in the period distribution of the
late K and early M stars. Either star formation in this direction has
been variable, or stars evolve in period at a non-uniform rate, or
some stars evolve more rapidly than others at the same mass. Finally,
using the ACF as a measure of the activity level, I found that while
the F, G, and early K stars become less active as their periods
increase, there is no correlation between period and activity for the
mid K to early M stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 88 186 Selected common proper motion (CPM) stars in
the Kepler field
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/329 : URAT1 Catalog (Zacharias+ 2015)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
I/317 : The PPMXL Catalog (Roeser+ 2010)
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
J/ApJ/821/93 : Rotation + Galactic kinematics of mid M dwarfs (Newton+, 2016)
J/MNRAS/455/4212 : Pan-STARRS 1: occurrence in the Kepler field (Dacon+, 2016)
J/AJ/151/68 : Kepler Mission. VII. Eclipsing binaries in DR3 (Kirk+, 2016)
J/ApJS/220/19 : LAMOST obs. in the Kepler field. I. (De Cat+, 2015)
J/ApJ/780/159 : Old field stars rotation-mass-age relations (Epstein+, 2014)
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/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)
J/ApJ/733/L9 : Stellar rotation for 71 NGC 6811 members (Meibom+, 2011)
J/ApJ/728/117 : Kepler planetary candidates. I. (Borucki+, 2011)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
http://archive.stsci.edu/kepler/ : MAST Kepler archive
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num [1/102] Running CPM Pair number
5- 12 I8 --- KIC Kepler Input Catalog number
14- 19 F6.1 mas/yr pmRA [-123.8/124.1] Proper motion in RA
21- 23 F3.1 mas/yr e_pmRA [0/6] Error in pmRA
25- 30 F6.1 mas/yr pmDE [-178.8/227.1] Proper motion in DE
32- 34 F3.1 mas/yr e_pmDE [0/6.4] Error in pmDE
36- 40 f5.1 arcsec Sep [6/577] Separation of components A and B
42- 43 I2 --- Irp [10/99] Relative common proper motion probability
45- 50 F6.3 mag gmag [7.9/19] The g band magnitude on the KIC system
52- 56 F5.3 mag g-Ks [0.6/6.2] The g-K color index
58- 62 F5.2 d Per [0/55.2] Rotation period
64- 68 F5.2 d e_Per [0/15] Uncertainty in Per
70- 76 F7.1 ppm Var [0/40360] Amplitude of correlated variability (V)
78- 83 F6.1 ppm e_Var [0.3/4744] Uncertainty in Var
85- 86 I2 --- NQ [1/18] Number of Kepler quarters
88 A1 --- Type Autocorrelation function type (1)
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Note (1): Autocorrelation function type as follows:
P = Periodic (78 occurrences);
A = Alternating peaks (47 occurrences);
T = Triple-peak pattern (19 occurrences);
C = Complex pattern (11 occurrences);
I = Indeterminate (31 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Aug-2017