J/AJ/165/168 Terrestrial planets in the Venus zone (Ostberg+, 2023)
The Demographics of Terrestrial Planets in the Venus Zone.
Ostberg C., Kane S.R., Li Z., Schwieterman E.W., Hill M.L., Bott K.,
Dalba P.A., Fetherolf T., Head J.W., Unterborn C.T.
<Astron. J., 165, 168 (2023)>
=2023AJ....165..168O 2023AJ....165..168O
ADC_Keywords: Exoplanets; Stars, distances; Stars, diameters; Stars, masses;
Effective temperatures; Optical
Keywords: Exoplanet astronomy ; Exoplanet catalogs ; Exoplanet atmospheres
; Exoplanet systems ; Exoplanets ; Venus ; Observational
astronomy
Abstract:
Understanding the physical characteristics of Venus, including its
atmosphere, interior, and its evolutionary pathway with respect to
Earth, remains a vital component for terrestrial planet evolution
models and the emergence and/or decline of planetary habitability. A
statistical strategy for evaluating the evolutionary pathways of
terrestrial planets lies in the atmospheric characterization of
exoplanets, where the sample size provides sufficient means for
determining required runaway greenhouse conditions. Observations of
potential exo-Venuses can help confirm hypotheses about Venus's past,
as well as the occurrence rate of Venus-like planets in other systems.
Additionally, the data from future Venus missions, such as DAVINCI,
EnVision, and VERITAS, will provide valuable information regarding
Venus, and the study of exo-Venuses will be complimentary to these
missions. To facilitate studies of exo-Venus candidates, we provide a
catalog of all confirmed terrestrial planets in the Venus zone,
including transiting and nontransiting cases, and quantify their
potential for follow-up observations. We examine the demographics of
the exo-Venus population with relation to stellar and planetary
properties, such as the planetary radius gap. We highlight specific
high-priority exo-Venus targets for follow-up observations, including
TOI-2285b, LTT1445Ac, TOI-1266c, LHS1140c, and L98-59d. We also
discuss follow-up observations that may yield further insight into the
Venus/Earth divergence in atmospheric properties.
Description:
All of the planetary and stellar data used in this work were acquired
from the NASA Exoplanets Archive (http://doi.org/10.26133/NEA12) using
the Application Program Interface. We used the default properties for
each system, and the data are current as of 2023 January 19.
If not available for a given system, the values for stellar
luminosity, planet incident flux, and planet equilibrium temperature
were calculated when possible. If either a measured planet radius or
mass was not available, then the missing values were calculated using
the methodology of Chen & Kipping, 2017, J/ApJ/834/17.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 205 318 Venus zone planet properties
table2.dat 119 251 Venus zone host star properties
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See also:
J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006)
J/A+A/537/L2 : Transmission spectrum of Venus (Ehrenreich+, 2012)
J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)
J/AJ/151/59 : Catalog Earth-Like Exoplanet Survey Targets (Chandler+, 2016)
J/A+A/602/A88 : 5 M dwarfs radial velocity curves (Astudillo-Defru+, 2017)
J/AJ/153/208 : LCES HIRES/Keck radial velocity Exoplanet (Butler+, 2017)
J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/A+A/618/A142 : Radial velocity for GJ 1132 (Bonfils+, 2018)
J/ApJ/874/L8 : The TESS Habitable Zone Star Catalog (Kaltenegger+, 2019)
J/A+A/628/A39 : Radial velocities of GJ 357 (Luque+, 2019)
J/A+A/627/A49 : Teegarden's Star RV and Hα curves (Zechmeister+, 2019)
J/A+A/642/A121 : LHS1140 radial velocity data (Lillo-Box+, 2020)
J/A+A/636/A74 : HARPS radial velocity database (Trifonov+, 2020)
J/A+A/653/A41 : L 98-59 (TOI-175) ESPRESSO observations (Demangeon+, 2021)
J/AJ/161/130 : List of 100 targets for NEID Earth Twin Survey (Gupta+, 2021)
J/AJ/163/168 : Photometry and radial velocity of LTT 1445A (Winters+, 2022)
J/AJ/165/34 : Habitable Zone Exoplanets NASA Exoplanet Archive (Hill+, 2023)
http://doi.org/10.26133/NEA12 : NASA Exoplanets Archive 12
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Star Host star identifier
18- 19 A2 --- Planet Planet identifier
21- 24 F4.1 % CHZ [0/78.2] Likelihood, Conservative Habitable Zone
(1)
26- 30 F5.1 % VZ [21.8/100] Likelihood, Venus Zone (1)
32- 37 F6.3 --- Loc [0/1]? Location (2)
39- 42 F4.2 Rgeo Rad [0.54/1.99] Radius
44- 49 F6.4 Rgeo E_Rad [0.01/2]? Upper Uncertainty in Rad
51- 57 F7.4 Rgeo e_Rad [-2/-0.01]? Lower Uncertainty in Rad
59- 59 A1 --- r_Rad [0/1] References for Rad (3)
61- 65 F5.2 Mgeo Mass [0.07/16.2] Mass
67- 73 F7.5 Mgeo E_Mass [4e-05/0.007]? Upper Uncertainty in Mass
75- 82 F8.5 Mgeo e_Mass [-0.005/-4e-05]? Lower Uncertainty in Mass
84- 84 A1 --- r_Mass [0/1] References for Mass (3)
86- 91 F6.2 d Per [0.95/385] Orbital Period
93-102 F10.8 d E_Per [1e-06/0.33]? Upper Uncertainty in Per
104-114 F11.8 d e_Per [-0.33/-1.5e-06]? Lower Uncertainty in Per
116-119 F4.2 --- e [0/0.53]? Eccentricity (4)
121-128 F8.6 --- E_e [0.005/0.3]? Upper Uncertainty in e
130-138 F9.6 --- e_e [-0.2/0]? Lower Uncertainty in e
140-140 A1 --- r_e [0/1] References for e (3)
142-152 F11.9 AU a [0.009/1.05] Semi-major axis
154-161 F8.6 AU E_a [2e-06/0.2]? Upper Uncertainty in a
163-171 F9.6 AU e_a [-0.2/-2e-06]? Lower Uncertainty in a
173-183 F11.7 K Teq [243/623] Planetary equilibrium temperature
185-190 F6.3 --- Flux [0.58/24.9] Isolation flux, Earth units (Sgeo)
192-197 F6.2 --- TSM [0.24/500]? transmission spectroscopy metric
201-205 F5.3 km/s K [0.031/6.496]? Radial velocity amplitude
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Note (1): The percentage of a planet's orbit that is spent within the
VZ and CHZ are shown in the columns labeled 'VZ (%)' and 'CHZ
(%)', respectively. If a planet does not spend 100% of its orbit
in the VZ, then it will spend the remainder of its orbit in
either the CHZ, or between the inner VZ boundary and the host
star. Thus, the summation of the CHZ and VZ columns will
generally constitute 100% of the orbit, except in cases where the
planet ventures interior to the inner VZ boundary.
Note (2): The location column, marked, indicates where the relative
location of the planet's semi-major axis, a, lies within the VZ. The
location values range from 0 to 1, where 0 is the inner VZ boundary
and 1 is the outer VZ boundary.
Note (3): References as follows:
0 = taken from the NASA Exoplanets Archives, as of 2023 January 19
1 = calculated in this work.
Note (4): The orbital eccentricity, of a planet was set to a 0
when there is no eccentricity measurement. Measured
eccentricities of 0 are listed as '0.00'.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Star Star host name
18- 22 F5.3 Rsun Rad [0.11/1.49] Stellar radius
24- 27 F4.2 Rsun E_Rad [0.01/0.6]? Upper Uncertainty
29- 33 F5.2 Rsun e_Rad [-0.6/-0.01]? Lower Uncertainty
35- 35 A1 --- r_Rad References of Rad (1)
37- 40 F4.2 Msun Mass [0.09/1.2]? Stellar mass
42- 46 F5.2 Msun E_Mass [-0.3/-0.01]? Upper Uncertainty
48- 51 F4.2 Msun e_Mass [0.01/0.4]? Lower Uncertainty
53- 58 F6.1 K Teff [2566/6257] Surface effective temperature
60- 65 F6.2 K E_Teff [0/375]? Upper Uncertainty
67- 73 F7.2 K e_Teff [-376/0]? Lower Uncertainty
75- 78 F4.2 [cm/s2] logg [4.15/5.24]? log, surface gravity
80- 84 F5.3 Lsun Lum [0.001/2.4] Lumonsity
86- 86 A1 --- r_Lum References of Lum (1)
88- 93 F6.3 mag Jmag [3.03/14.5]? J-band magnitude
95-100 F6.3 mag Vmag [4.26/18.2]? V-band magnitude
102-107 F6.3 --- Fe/H [-0.66/0.48] Metallicity
109-119 F11.6 pc Dist [1.3/2147]? Distance
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Note (1): References as follows:
0 = taken from the NEA 12 as of 2023 January 19
1 = calculated in this work.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 08-Sep-2023