J/AJ/161/189 Catalog of gyro-kinematic ages for ∼30000 Kepler stars (Lu+, 2021)
Gyro-kinematic ages for around 30000 Kepler stars.
Lu Y., Angus R., Curtis J.L., David T.J., Kiman R.
<Astron. J., 161, 189-189 (2021)>
=2021AJ....161..189L 2021AJ....161..189L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, ages; Effective temperatures; Stars, dwarfs; Optical
Keywords: Stellar ages; Stellar kinematics; Stellar rotation
Abstract:
Estimating stellar ages is important for advancing our understanding
of stellar and exoplanet evolution and investigating the history of
the Milky Way. However, ages for low-mass stars are hard to infer as
they evolve slowly on the main sequence. In addition, empirical dating
methods are difficult to calibrate for low-mass stars as they are
faint. In this work, we calculate ages for Kepler F, G, and crucially
K and M-dwarfs, using their rotation and kinematic properties. We
apply the simple assumption that the velocity dispersion of stars
increases over time and adopt an age-velocity-dispersion relation
(AVR) to estimate average stellar ages for groupings of coeval stars.
We calculate the vertical velocity dispersion of stars in bins of
absolute magnitude, temperature, rotation period, and Rossby number
and then convert velocity dispersion to kinematic age via an AVR.
Using this method, we estimate gyro-kinematic ages for 29949 Kepler
stars with measured rotation periods. We are able to estimate ages for
clusters and asteroseismic stars with an rms of 1.22Gyr and 0.26Gyr
respectively. With our Astraea machine-learning algorithm, which
predicts rotation periods, we suggest a new selection criterion (a
weight of 0.15) to increase the size of the McQuillan et al. catalog
of Kepler rotation periods by up to 25%. Using predicted rotation
periods, we estimated gyro-kinematic ages for stars without measured
rotation periods and found promising results by comparing 12 detailed
age-element abundance trends with literature values.
Description:
To construct the gyro-kinematic age catalog, we started with the
rotation period catalog from McQuillan+, 2014, J/ApJS/211/24 with
34030 measured rotation periods and added an extra 4637 stars from
Garcia+, 2014, J/A+A/572/A34 and Santos+, 2019, J/ApJS/244/21, which,
combined, contain 38667 stars. We then accessed their Gaia data from
the publicly available Kepler-Gaia DR2 cross-matched catalog produced
with a 1" search radius.
We cross-matched our rotation sample with the spectroscopic catalog
produced by the Large Sky Area Multi-Object Fibre Spectroscopic
Telescope (LAMOST) to obtain radial velocity (RVel) measurements.
In addition to the primary photometric, spectroscopic, and kinematic
data from Gaia, LAMOST, and Kepler, we also used multiple age catalogs
in order to test our results. We used the isochrone age catalog from
Berger+, 2020, J/AJ/160/108, the Kepler LEGACY asteroseismic age
catalog from Silva Aguirre+, 2017, J/ApJ/835/173, the open cluster
catalog from Curtis+, 2020ApJ...904..140C 2020ApJ...904..140C, and white dwarf cooling
ages for two white dwarf M-dwarf binaries from R.Kiman+, (2021, in
preparation).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 134 29949 Catalog of the 29949 gyro-kinematic ages with
measured rotation periods
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See also:
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/ApJ/695/679 : Stellar rotation in M35 (Meibom+, 2009)
J/ApJ/733/L9 : Stellar rotation for 71 NGC 6811 members (Meibom+, 2011)
J/ApJ/743/48 : Stars with rotation periods & X-ray luminosities (Wright+,2011)
J/ApJ/776/67 : Rotational tracks (van Saders+, 2013)
J/A+A/572/A34 : Pulsating solar-like stars in Kepler (Garcia+, 2014)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/AJ/152/113 : Pleiades members with K2 lightcurves.I. Periods (Rebull+, 2016)
J/ApJ/822/47 : K2 rotation periods for 65 Hyades members (Douglas+, 2016)
J/ApJ/835/173 : Kepler asteroseismic LEGACY sample. II. (Silva Aguirre+, 2017)
J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)
J/ApJ/842/83 : Praesepe members rotational periods from K2 LCs (Douglas+,2017)
J/AJ/156/18 : APOGEE DR14:Binary comp. of evolved stars (Price-Whelan+,2018)
J/ApJ/862/33 : Improved & expanded membership cat. for NGC752 (Agueros+, 2018)
J/ApJ/865/68 : Abundances for 79 Sun-like stars within 100pc (Bedell+, 2018)
J/MNRAS/474/2580 : Temporal evolution of neutron-capture elements (Spina+,2018)
J/A+A/624/A19 : GALAH survey, chemodynamical analyse with TGAS (Buder+, 2019)
J/ApJ/871/174 : Kepler rapid rotators and Ks-band excesses (Simonian+, 2019)
J/ApJ/878/21 : Vertical motions of APOGEE & Gaia red clump stars (Ting+, 2019)
J/ApJ/879/49 : Rotation periods for 171 Gaia memb.of NGC 6811 (Curtis+, 2019)
J/ApJ/879/100 : K2 Prot for Hyades & Praesepe members (Douglas+, 2019)
J/ApJS/244/21 : Surface rotation & activity of Kepler stars. I. (Santos+, 2019)
J/ApJS/245/34 : Abundances for 6 million stars from LAMOST DR5 (Xiang+, 2019)
J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)
J/AJ/160/108 : Gaia-Kepler stellar prop. catalog.II. Planets (Berger+, 2020)
J/MNRAS/494/2429 : Kinematics of nearby young stars (Binks+, 2020)
http://gaia-kepler.fun/ : Cross-matched Gaia data stars observed by Kepler/K2
http://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archive
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Target identification number, Kepler Input
Catalog (1)
10- 15 F6.3 d Prot [0.2/68] Rotation period (2)
17- 21 F5.3 d e_Prot [0/10] Error on rotation period (2)
23- 41 I19 --- Gaia Gaia DR2 Source ID (3)
43- 49 F7.3 deg RAdeg [279/302] Right Ascension, Gaia DR2 (ICRS)
at Ep=2015.5
51- 55 F5.3 deg e_RAdeg [0.009/0.62] Error on RAdeg from Gaia DR2 (3)
57- 62 F6.3 deg DEdeg [36.5/52.5] Declination, Gaia DR2 (ICRS)
at Ep=2015.5 (3)
64- 68 F5.3 deg e_DEdeg [0.01/0.7] Arror on DEdeg from Gaia DR2 (3)
70- 77 F8.3 km/s Wvel [-259/415] Vertical velocity (4)
79- 84 F6.3 km/s e_Wvel [0.03/42]? Error on Wvel (4)
86- 92 F7.3 km/s sigma [0.10/137] Velocity dispersion (5)
94-100 F7.3 Gyr GyroAge [0.002/142] Gyro-kinematic ages (6)
102-106 F5.3 Gyr e_GyroAge [1.6/2] Error on GyroAge (6)
108-112 F5.3 --- Ro [0.005/9.83] Rossby number (5)
114-121 F8.3 K Teff [3351/7970] Effective temperature (5)
123-128 F6.3 mag GMAG [-0.03/11] Absolute G-band magnitude (5)
130-134 F5.3 km/s e_sigma [0/0.07] Error on sigma (5)
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Note (1): Kepler Input Catalog identifier from the Kepler Stellar Table
(doi:10.26133/NEA6) at the NASA Exoplanet Archive as obtained via the
http://gaia-kepler.fun/ crossmatch database created by Megan Bedell.
Note (2): Literature rotation periods collected from
McQuillan+, 2014, J/ApJS/211/24, Garcia+, 2014, J/A+A/572/A34 and
Santos+, 2019, J/ApJS/244/21.
Note (3): Gaia DR2 results obtained via the http://gaia-kepler.fun/ crossmatch
database created by Megan Bedell
Note (4): Vertical velocity from radial velocity LAMOST DR5,
Cui+, 2012RAA....12.1197C 2012RAA....12.1197C; Xiang+, 2019, J/ApJS/245/34 or Gaia DR2,
or Angus+, (in prep).
Note (5): Effective temperatures, absolute Gaia G-band magnitudes, Rossby
numbers and vertical velocity dispersion calculated in this work.
Note (6): Gyro-kinematic age from the age velocity dispersion relation with
errors combining error from AVR fits and uncertainties on the stellar
parameters.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 29-Jun-2021