J/AJ/158/190 Main sequence hot Jupiter hosts with good astrometry (Hamer+, 2019)
Hot Jupiters are destroyed by tides while their host stars are on the main
sequence.
Hamer J.H., Schlaufman K.C.
<Astron. J., 158, 190 (2019)>
=2019AJ....158..190H 2019AJ....158..190H (SIMBAD/NED BibCode)
ADC_Keywords: Stellar distribution ; Exoplanets
Keywords: Exoplanet dynamics - Exoplanet evolution - Exoplanet systems -
Exoplanets - Tidal interaction - Exoplanet tides - Hot Jupiters
Abstract:
While cooler giant planets are often observed with nonzero eccentricities,
the short-period circular orbits of hot Jupiters suggest that they lose
orbital energy and angular momentum due to tidal interactions with their
host stars. However, orbital decay has never been unambiguously observed.
We use data from Gaia Data Release 2 (Cat. I/345) to show that hot Jupiter
host stars have a smaller Galactic velocity dispersion than a similar
population of stars without hot Jupiters. Since Galactic velocity
dispersion is correlated with age, this observation implies that the
population of hot Jupiter host stars is on average younger than the field
population. The best explanation for this inference is that tidal
interactions cause hot Jupiters to inspiral while their host stars are on
the main sequence. This observation requires that the typical modified
stellar tidal quality factor Q*' for solar-type stars is in the range
log10Q*'~<7.
Description:
We obtain our list of hot Jupiter hosts from the NASA Exoplanet Archive.
We select hot Jupiters according to the fiducial definition of
Wright et al. (2012ApJ...753..160W 2012ApJ...753..160W): planets with orbital period P<10 days
and minimum mass Mpsini>0.1 MJup. We query SIMBAD for each hot Jupiter
host's Gaia-DR2 designation. For objects without a radial velocity from
the NASA Exoplanet Archive, we use the Gaia-DR2 radial velocity
(Katz et al. 2019A&A...622A.205K 2019A&A...622A.205K).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 41 338 Main sequence hot Jupiter hosts with good
astrometry
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/ApJ/757/18 : Radial velocities for 16 hot Jupiter host stars
(Albrecht+, 2012)
J/ApJ/788/39 : Hot Jupiter exoplanets host stars EW and abundances
(Teske+, 2014)
http://exoplanetarchive.ipac.caltech.edu/ : NASA Exoplanet Archive
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- ArchiveName NASA Exoplanet Archive name of hot Jupiter
host
19- 41 A23 --- SimbadName Corresponding SIMBAD host name
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 10-Jan-2020