J/A+A/560/A4 Rotation periods of active Kepler stars (Reinhold+, 2013)
Rotation and differential rotation of active Kepler stars.
Reinhold T., Reiners A., Basri G.
<Astron. Astrophys. 560, A4 (2013)>
=2013A&A...560A...4R 2013A&A...560A...4R
ADC_Keywords: Surveys ; Stars, variable
Keywords: stars: activity - stars: rotation - starspots
Abstract:
We present rotation periods for thousands of active stars in the
Kepler field derived from Q3 data. In most cases a second period close
to the rotation period was detected, which we interpreted as surface
differential rotation (DR).
Description:
Active stars were selected from the whole sample using the range of
the variability amplitude. To detect different periods in the light
curves we used the Lomb-Scargle periodogram in a pre-whitening
approach to achieve parameters for a global sine fit. The most
dominant periods from the fit were ascribed to different surface
rotation periods, but spot evolution could also play a role. Due to
the large number of stars the period errors were estimated in a
statistical way. We thus cannot exclude the existence of false
positives among our periods.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 64 24124 Rotation periods of Kepler stars
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/AJ/130/873 : Properties of BQS objects in SDSS DR3 area (Jester+, 2005)
J/PASP/124/1279 : Q3 Kepler's combined photometry (Christiansen+, 2012)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Kepler Input catalogue (KIC, V/133) number,
unique Kepler ID of each star
10- 16 F7.4 d P1 Primary rotation period measured for all stars
18- 23 F6.4 d e_P1 Error of P1 estimated by fitting a parabola to
the corresponding periodogram peak
25- 31 F7.4 d P2 ?=- Second rotation period detected
34- 40 F7.4 d e_P2 ?=- Error of P2
42- 46 I5 K Teff [3232/17018] Effective temperature (from KIC)
48- 51 F4.2 [cm/s2] logg [3.5/6.11] Surface gravity (from KIC)
54- 58 F5.2 % Rvar [0/100]?=- Range of the variability amplitude
(5th to 95th percentile of the total flux range;
active stars have Rvar>0.3%)
60- 64 F5.2 mag B-V B-V color (1)
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Note (1): B-V color calculated from relation between (g-r) given by KIC and
(B-V) (see Jester et. al. 2005, Cat. J/AJ/130/873)
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Acknowledgements:
Timo Reinhold, reinhold(at)astro.physik.uni-goettingen.de
(End) Patricia Vannier [CDS] 19-Aug-2013