J/ApJ/953/182 Improved stellar parameters of Kepler RGB stars (Wang+, 2023)
Asteroseismic modeling of 1153 Kepler red giant branch stars: improved stellar
parameters with gravity-mode period spacings and luminosity constraints.
Wang Y., Li T., Bi S., Bedding T.R., Li Y.
<Astrophys. J., 953, 182 (2023)>
=2023ApJ...953..182W 2023ApJ...953..182W
ADC_Keywords: Asteroseismology; Stars, giant; Abundances; Stars, ages;
Stars, masses; Stars, diameters; Surveys; Optical; Infrared
Keywords: Asteroseismology
Abstract:
This paper reports the estimated stellar parameters of 1153 Kepler red
giant branch stars determined with asteroseismic modeling. We use
radial-mode oscillation frequencies, gravity-mode period spacings,
Gaia luminosities, and spectroscopic data to characterize these stars.
Compared with previous studies, we find that the two additional
observed constraints, i.e., the gravity-mode period spacing and
luminosity, significantly improve the precision of fundamental stellar
parameters. The typical uncertainties are 2.9% for the mass, 11% for
the age, 1.0% for the radius, 0.0039 dex for the surface gravity, and
0.5% for the helium core mass, making this the best-characterized
large sample of red giant stars available to date. With better
characterizations for these red giants, we recalibrate the seismic
scaling relations and study the surface term on the red giant branch.
We confirm that the surface term depends on the surface gravity and
effective temperature, but there is no significant correlation with
metallicity.
Description:
In this study, the sample of Kepler "red giant branch (RGB)" stars in
LI22 (Li+ 2022, J/ApJ/927/167) serves as the basis for our analysis.
This initial sample is composed of 3642 RGB stars with measured radial
oscillation mode frequencies.
We crossmatched the sample with the Kepler Red Giant Period Interval
Catalog given by V16 (Vrard+ 2016, J/A+A/588/A87) to determine period
spacings. We also use Gaia DR3 (see I/355).
The final sample includes 1153 Kepler RGB stars, 887 of which are
LAMOST targets, 776 are APOGEE targets, and 510 are common sources.
See Section 2 for further explanations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 176 1663 Observed constraints and model-inferred stellar
parameters
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)
J/ApJ/729/L10 : KIC stars properties in NGC 6791 and NGC 6819 (Basu+, 2011)
J/ApJ/765/L41 : Asteroseismic classification of KIC objects (Stello+, 2013)
J/MNRAS/452/2127 : Fundamental param. of Kepler stars (Silva Aguirre+, 2015)
J/A+A/588/A87 : Seismic global parameters of 6111 KIC (Vrard+, 2016)
J/ApJ/844/102 : KIC star plxs from asteroseismology vs Gaia (Huber+, 2017)
J/MNRAS/476/3233 : 14983 Kepler red giants (Hon+, 2018)
J/AJ/157/245 : High-precision RVel for HD 221416 (Huber+, 2019)
J/AJ/159/280 : Gaia-Kepler stellar properties cat. I. KIC (Berger+, 2020)
J/AJ/162/211 : APF RVel follow up of ι Draconis (Hill+, 2021)
J/A+A/668/A82 : KIC4054905 radial velocities (Brogaard+, 2022)
J/ApJ/927/167 : Asteroseismology of Kepler RGB stars (Li+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [0/1662] Internal index number
6- 13 I8 --- KIC [1027337/12885196] Kepler Input Catalog number
15- 20 A6 --- Source Survey source identifier ("LAMOST",
887 occurrences or "APOGEE", 776 occurrences)
22- 25 I4 K Teff [4157/5759] Observed effective temperature
27- 29 I3 K e_Teff [9/820] Uncertainty in Teff
31- 36 F6.3 [-] [M/H] [-0.3/0.3] Observed metallicity
38- 42 F5.3 [-] e_[M/H] [0.005/0.8] Uncertainty in [M/H]
44- 49 F6.3 uHz Dnu [3.92/17.97] Observed δν scaling
relation
51- 55 F5.3 uHz e_Dnu [0.009/0.3] Uncertainty in Dnu
57- 62 F6.2 uHz numax [34/256] Observed ν{max} scaling relation
64- 67 F4.2 uHz e_numax [0.3/3.6] Uncertainty in numax
69- 73 F5.1 s DPi1 [51.4/104.5] Period spacing
75- 79 F5.2 s e_DPi1 [0.1/15.2] Uncertainty in DPi1
81- 85 F5.1 Lsun Lum [6.8/369] Luminosity
87- 91 F5.1 Lsun e_Lum [0.2/466] Uncertainty in Lum
93- 96 F4.2 Msun Mstar [0.88/1.9] Model-inferred stellar mass
98- 101 F4.2 Msun E_Mstar [0/0.5] Upper uncertainty in Mstar
103- 106 F4.2 Msun e_Mstar [0/0.4] Lower uncertainty in Mstar
108- 111 F4.1 Gyr Age [1.3/21.3] Model-inferred stellar age
113- 116 F4.1 Gyr E_Age [0/13.7] Upper uncertainty in Age
118- 121 F4.1 Gyr e_Age [0/20.4] Lower uncertainty in Age
123- 127 F5.2 Rsun Rstar [3.8/11] Model-inferred stellar radius
129- 132 F4.2 Rsun E_Rstar [0/0.7] Upper uncertainty in Rstar
134- 137 F4.2 Rsun e_Rstar [0/0.6] Lower uncertainty in Rstar
139- 143 F5.3 [cm/s2] logg [2.43/3.34] log of surface gravity
145- 149 F5.3 [cm/s2] E_logg [0/0.06] Upper uncertainty in logg
151- 155 F5.3 [cm/s2] e_logg [0/0.05] Lower uncertainty in logg
157- 162 F6.4 Msun mc [0.17/0.27] Model-inferred stellar helium
core mass
164- 169 F6.4 Msun E_mc [0/0.02] Upper uncertainty in mc
171- 176 F6.4 Msun e_mc [0/0.02] Lower uncertainty in mc
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 26-Sep-2025