J/ApJ/929/143 Age estimations of low-mass TESS CVZ stars (Ware+, 2022)
Continuous habitable zones: using Bayesian methods to prioritize
characterization of potentially habitable worlds.
Ware A., Young P., Truitt A., Spacek A.
<Astrophys. J., 929, 143 (2022)>
=2022ApJ...929..143W 2022ApJ...929..143W
ADC_Keywords: Stars, double and multiple; Stars, ages; Stars, masses; Abundances
Keywords: Interdisciplinary astronomy ; Stellar properties ;
Habitable planets ; Catalogs ; Habitable zone ; Exoplanets ;
Stellar evolutionary tracks ; Stellar evolutionary models ;
Stellar evolution ; Astrobiology ; Stellar ages ; Bayesian statistics
Abstract:
The number of potentially habitable planets continues to increase, but
we lack the time and resources to characterize all of them. With
∼30 known potentially habitable planets and an ever-growing number of
candidate and confirmed planets, a robust statistical framework for
prioritizing characterization of these planets is desirable. Using the
∼2Gyr it took life on Earth to make a detectable impact on the
atmosphere as a benchmark, we use a Bayesian statistical method to
determine the probability that a given radius around a star has been
continuously habitable for 2Gyr. We perform this analysis on nine
potentially habitable exoplanets with planetary radii <1.8R⊕
and/or planetary masses <10M⊕ around nine low-mass host stars
(∼0.5-1.1M☉) with measured stellar mass and metallicity, as well
as Venus, Earth, and Mars. Ages for the host stars are generated by
the analysis. The technique is also used to provide age estimates for
2768 low-mass stars (0.5-1.3M☉) in the TESS Continuous Viewing
Zones.
Description:
After the automatisation of age determination (see Section 2), we have
determined ages for a sample of the Transiting Exoplanet Survey
Satellite (TESS) Continuous Viewing Zone (CVZ) targets from the TESS
Input Catalog (TIC). The sample of 2768 stars was retrieved from the
TIC version 8.1 via the Mikulski Archive for Space Telescopes at the
Space Telescope Science Institute.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 78 2768 TESS Continuous Viewing Zone (CVZ) stellar ages
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
J/ApJS/159/141 : Sp. properties of cool stars. I. (Valenti+, 2005)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/A+A/487/373 : Sp. parameters of 451 HARPS-GTO stars (Sousa+, 2008)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/ApJ/807/45 : Habitable planets orbiting M dwarfs (Dressing+, 2015)
J/ApJ/803/90 : τ Cet chemical composition (Pagano+, 2015)
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (Sullivan+, 2015)
J/A+A/585/A5 : Exoplanet hosts/field stars ages (Bonfanti+, 2016)
J/MNRAS/457/2877 : Kepler M dwarf stars revised properties (Gaidos+, 2016)
J/AJ/154/109 : California-Kepler Survey (CKS). III. Radii (Fulton+, 2017)
J/AJ/154/108 : California-Kepler Survey (CKS). II. (Johnson+, 2017)
J/ApJS/229/30 : Revised properties of Q1-17 Kepler targets (Mathur+, 2017)
J/ApJS/239/2 : Simulated exoplanets from TESS (Barclay+, 2018)
J/ApJ/866/99 : Radii of KIC stars & planets using Gaia DR2 (Berger+, 2018)
J/ApJS/235/38 : Kepler pl. cand. VIII. DR25 reliability (Thompson+, 2018)
J/AJ/159/124 : Searching Kepler data. I. 17 new planets (Kunimoto+, 2020)
J/AJ/161/36 : Exoplanets in habitable zone with Kepler (Bryson+, 2021)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 I10 --- TIC [25063999/1884483579] TESS Input Catalog ID
12- 19 E8.3 Gyr Age [6.3e+08/1.1e+10] Stellar age
21- 28 E8.3 Gyr E_Age [8.9e+07/6e+09] Upper uncertainty in Age
30- 37 E8.3 Gyr e_Age [3.8e+07/5.6e+09] Lower uncertainty in Age
39- 42 F4.2 Msun Mass [0.5/1.3] Stellar mass (1)
44- 47 F4.2 Msun e_Mass [0.02/0.3] Uncertainty in Mass
49- 52 I4 K Teff [3512/6432] Stellar effective temperature (1)
54- 56 I3 K e_Teff [95/306] Uncertainty in Teff
58- 62 F5.2 Lsun Lum [0.03/25.5] Stellar luminosity (1)
64- 67 F4.2 Lsun e_Lum [0.01/3] Uncertainty in Lum
69- 73 F5.2 --- MH [-1.8/0.5]? Metallicity (1)
75- 78 F4.2 --- e_MH [0/0.2]? Uncertainty in MH
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Note (1): Stellar mass, effective temperature, luminosity, and metallicity
values are taken from the TESS Input Catalog version 8.1 (see IV/39).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Mar-2024