J/ApJS/239/14 Revised exoplanet radii from Gaia DR2 (Johns+, 2018)
Revised exoplanet radii and habitability using Gaia Data Release 2.
Johns D., Marti C., Huff M., McCann J., Wittenmyer R.A., Horner J.,
Wright D.J.
<Astrophys. J. Suppl. Ser., 239, 14 (2018)>
=2018ApJS..239...14J 2018ApJS..239...14J
ADC_Keywords: Exoplanets; Stars, diameters; Effective temperatures
Keywords: astrobiology ; planets and satellites: fundamental parameters ;
planets and satellites: general ; catalogs ; surveys ;
planets and satellites: fundamental parameters
Abstract:
Accurate stellar properties are crucial for determining exoplanet
characteristics. Gaia DR2 presents revised distances, luminosities,
and radii for 1.6 billion stars. Here, we report the calculation of
revised radii and densities for 320 non-Kepler exoplanets using this
data and present updated calculations of the incident flux received by
690 known exoplanets. This allows us to reassess the likelihood that
those planets orbit in the habitable zone of their host stars. As a
result of this analysis, three planets can be added to the catalog of
potentially habitable worlds: HIP 67537b, HD 148156b, and HD 106720b.
In addition, the changed parameterization of BD +49 898 means that its
planet, BD +49 898b, now receives an incident flux that places it
outside the optimistic habitable zone region, as defined by Kopparapu
et al. We find that use of the new Gaia data results in a mean
increase in the calculated exoplanet radius of 3.76%. Previously,
CoRoT-3 b had been reported as having the highest density of all known
exoplanets. Here, we use updated information to revise the calculated
density of CoRoT-3 b from 26.4 to 16.1±3.98g/cm3. We also report
the densest exoplanet in our data set, KELT-1 b, with a density of
22.1-9.16+5.62g/cm3. Overall, our results highlight the
importance of ensuring the parameterizations of known exoplanets are
revisited whenever significant improvements are made to the precision
of the stellar parameters upon which they are based.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 75 750 Host star properties; all parameters are taken
from Gaia DR2
table3.dat 145 807 Revised properties of exoplanets
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/A+A/375/L27 : HD 80606b, planet on an very elongated orbit (Naef+ 2001)
J/A+A/491/889 : CoRoT-Exo-3b observations (Deleuil+, 2008)
J/A+A/480/L33 : Radial velocities of HD 4113 and HD 156846 (Tamuz+, 2008)
J/A+A/507/487 : GJ 581 radial velocity curve (Mayor+, 2009)
J/A+A/523/A15 : HARPS XXIII: RV data for the 8 targets (Naef+, 2010)
J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)
J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)
J/AJ/145/5 : Follow-up photometry of HATS-1 (Penev+, 2013)
J/A+A/562/L3 : WASP-103b radial velocities and light curves (Gillon+, 2014)
J/ApJS/210/20 : Small Kepler planets radial velocities (Marcy+, 2014)
J/MNRAS/452/2127 : Fundamental param. of Kepler stars (Silva Aguirre+, 2015)
J/AJ/152/105 : Kepler-80 transit timing observations (MacDonald+, 2016)
J/AJ/153/211 : Differential photometry of F-subgiant HAT-P-67 (Zhou+, 2017)
J/A+A/613/A25 : Radial velocity for Ross 128 (Bonfils+, 2018)
http://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archive home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Host Host name
25- 32 F8.3 Lsun Lum [0.04/1244.2]? Host luminosity, solar units
34- 40 F7.3 Lsun E_Lum [0/97.2]? Upper uncertainty in Lum
42- 48 F7.3 Lsun e_Lum [-97.2/0]? Lower uncertainty in Lum
50- 55 F6.3 Rsun Rad [0.5/78.2]? Host radius, solar units
57- 62 F6.3 Rsun E_Rad [0.003/8.5]? Upper uncertainty in Rad
64- 70 F7.3 Rsun e_Rad [-13.2/-0.003]? Lower uncertainty in Rad
72- 75 I4 K Teff [3382/9435] Host effective temperature
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 25 A25 --- Planet Planet Name
27- 31 F5.3 Rjup Rad [0.1/2.9]? Planet Radius
33- 38 F6.3 Rjup E_Rad [0.01/1.8]? Upper uncertainty in Rad
40- 45 F6.3 Rjup e_Rad [-1.8/-0.01]? Lower uncertainty in Rad
47- 52 F6.3 Mjup Mass [0.01/55.6]? Planet Mass (1)
54- 60 F7.3 Mjup E_Mass [0/78.6]? Upper uncertainty in Mass
62- 68 F7.3 Mjup e_Mass [-78.6/0]? Lower uncertainty in Mass
70- 75 F6.3 g/cm3 rho [0.04/26]? Planet Density
77- 83 F7.3 g/cm3 E_rho [0.01/27.1]? Upper uncertainty in rho
85- 91 F7.3 g/cm3 e_rho [-27/-0.01]? Lower uncertainty in rho
93- 99 F7.3 au a [0.01/773]? Semi-major axis (1)
101-107 F7.3 au E_a [0/30]? Upper uncertainty in a
109-115 F7.3 au e_a [-30/0]? Lower uncertainty in a
117-125 F9.3 Earth Sinc [0/19317]? Planet Incident Flux
127-135 F9.3 Earth E_Sinc [0/3395]? Upper uncertainty in Sinc
137-145 F9.3 Earth e_Sinc [-3388/0]? Lower uncertainty in Sinc
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Note (1): NASA Exoplanet Archive (http://exoplanetarchive.ipac.caltech.edu/)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Dec-2018