J/AJ/160/90 Stellar parameters for 13196 Kepler dwarfs (Angus+, 2020)
Exploring the evolution of stellar rotation using galactic kinematics.
Angus R., Beane A., Price-Whelan A.M., Newton E., Curtis J.L., Berger T.,
van Saders J., Kiman R., Foreman-Mackey D., Lu Y., Anderson L., Faherty J.K.
<Astron. J., 160, 90 (2020)>
=2020AJ....160...90A 2020AJ....160...90A
ADC_Keywords: Stars, dwarfs; Stars, masses; Effective temperatures;
Velocity dispersion; Optical
Keywords: Stellar evolution ; Low mass stars ; Late-type stars ;
Stellar phenomena ; Solar analogs ; Stellar activity ;
Milky Way disk ; Milky Way dynamics ; Stellar magnetic fields
Abstract:
The rotational evolution of cool dwarfs is poorly constrained after
∼1-2Gyr due to a lack of precise ages and rotation periods for old
main-sequence stars. In this work, we use velocity dispersion as an
age proxy to reveal the temperature-dependent rotational evolution of
low-mass Kepler dwarfs and demonstrate that kinematic ages could be a
useful tool for calibrating gyrochronology in the future. We find that
a linear gyrochronology model, calibrated to fit the period-Teff
relationship of the Praesepe cluster, does not apply to stars older
than around 1Gyr. Although late K dwarfs spin more slowly than early-K
dwarfs when they are young, at old ages, we find that late K dwarfs
rotate at the same rate or faster than early-K dwarfs of the same age.
This result agrees qualitatively with semiempirical models that vary
the rate of surface-to-core angular momentum transport as a function
of time and mass. It also aligns with recent observations of stars in
the NGC6811 cluster, which indicate that the surface rotation rates of
K dwarfs go through an epoch of inhibited evolution. We find that the
oldest Kepler stars with measured rotation periods are late K and
early M dwarfs, indicating that these stars maintain spotted surfaces
and stay magnetically active longer than more massive stars. Finally,
based on their kinematics, we confirm that many rapidly rotating GKM
dwarfs are likely to be synchronized binaries.
Description:
We used the publicly available Kepler-Gaia DR2 crossmatched catalog to
combine the McQuillan+ (2014, J/ApJS/211/24) catalog of stellar
rotation periods, measured from Kepler light curves, with the Gaia DR2
catalog of parallaxes, proper motions, and apparent magnitudes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 180 13196 Data used for this project
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See also:
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+, 2007)
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
VI/137 : GaiaSimu Universe Model Snapshot (Robin+, 2012)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/128/426 : Subdwarfs in the SDSS (West+, 2004)
J/MNRAS/377/741 : VIc photometry of NGC 2516 (Irwin+, 2007)
J/AJ/133/2258 : Activity and kinematics of ultracool dwarfs (Schmidt+, 2007)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)
J/AJ/137/1 : PMs and astrometry of late-type dwarfs (Faherty+, 2009)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/AJ/141/92 : BVI photometry of 10 distant open clusters (Janes+, 2011)
J/ApJ/733/L9 : Stellar rotation for 71 NGC 6811 members (Meibom+, 2011)
J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)
J/A+A/543/A100 : GaiaSimu Universe Model Snapshot (Robin+, 2012)
J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 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/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)
J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)
J/ApJ/821/93 : Rotation & Galactic kinematics mid M dwarfs (Newton+, 2016)
J/ApJ/831/11 : KIC9777062 RVs & asteroseis.in NGC6811 (Sandquist+, 2016)
J/ApJ/842/83 : Praesepe mem. rotational periods from K2 LCs (Douglas+,2017)
J/ApJ/834/85 : Hα emission in nearby M dwarfs (Newton+, 2017)
J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)
J/ApJ/862/33 : Improved & expanded memb. catalog for NGC752 (Agueros+,2018)
J/AJ/156/217 : Stellar prop. for M dwarfs in MEarth-South (Newton+, 2018)
J/AJ/157/231 : MLSDSS-GaiaDR2 sample of M and L dwarfs (Kiman+, 2019)
J/A+A/621/A21 : Activity of Kepler stars (Reinhold+, 2019)
J/ApJ/871/174 : Kepler rapid rotators and Ks-band excesses (Simonian+, 2019)
J/A+A/635/A43 : Stellar rot. periods from K2 Campaigns 0-18 (Reinhold+,2020)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Kepler Input Catalog ID number
10- 30 F21.17 solMass Mass [0.25/1.2]? Stellar Mass (1)
32- 49 F18.13 K Teff [3358/6489]? Effective Temperature (2)
51- 69 F19.16 d Prot [4.8/67.8]? Rotation period (3)
71- 91 F21.18 d e_Prot [0.0/15.7]? Uncertainty in Prot
93-116 F24.19 km/s vb [-80.7/124]? Velocity in Galactic latitude
118-137 F20.18 km/s e_vb [0/1]? Uncertainty in vb
139-158 F20.16 km/s sigma [5.3/24.9]? Velocity dispersion (σvb)(4)
160-180 F21.17 km/s e_sigma [0.07/0.85]? Uncertainty in sigma (5)
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Note (1): From Berger+, 2020arXiv200107737B 2020arXiv200107737B
Note (2): From de-reddened Gaia photometry (Curtis+, 2020, submitted).
Note (3): From McQuillan+, 2014, J/ApJS/211/24
Note (4): 1.5xMAD of velocities.
Note (5): Calculated as the standard error of the sample standard deviation.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 20-Oct-2020