J/AJ/160/138 68 Gaia DR2 ultra-short-period planet host stars (Hamer+, 2020)
Ultra-short-period planets are stable against tidal inspiral.
Hamer J.H., Schlaufman K.C.
<Astron. J., 160, 138-138 (2020)>
=2020AJ....160..138H 2020AJ....160..138H (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets; Stars, variable; Radial velocities; Optical
Keywords: Exoplanet dynamics; Exoplanet evolution; Exoplanet tides; Stellar ages
Tidal interaction; Exoplanets
Abstract:
It has been unambiguously shown both in individual systems and at the
population level that hot Jupiters experience tidal inspiral before
the end of their host stars main-sequence lifetimes.
Ultra-short-period (USP) planets have orbital periods P<1 day, rocky
compositions, and are expected to experience tidal decay on similar
timescales to hot Jupiters if the efficiency of tidal dissipation
inside their host stars parameterized as Q*' is independent of P
and/or secondary mass Mp. Any difference between the two classes of
systems would reveal that a model with constant Q*' is insufficient.
If USP planets experience tidal inspiral, then USP planet systems will
be relatively young compared to similar stars without USP planets.
Because it is a proxy for relative age, we calculate the Galactic
velocity dispersions of USP planet candidate host and non-host stars
using data from Gaia Data Release 2 supplemented with ground-based
radial velocities. We find that main-sequence USP planet candidate
host stars have kinematics consistent with similar stars in the Kepler
field without observed USP planets. This indicates that USP planet
hosts have similar ages to field stars and that USP planets do not
experience tidal inspiral during the main-sequence lifetimes of their
host stars. The survival of USP planets requires that Q*'≳107 at
P∼0.7day and Mp∼2.6M⊕. This result demands that Q*' depend
on the orbital period and/or mass of the secondary in the range
0.5day≲P≲5days and 1M⊕≲Mp≲1000M☉.
Description:
We obtain our sample of Ultra-short-period (USP) planet candidate
hosts from Sanchis-Ojeda+,2014, J/ApJ/787/47.
We obtain the Gaia Data Release 2 (DR2) designations of these USP
planet candidate host stars from SIMBAD and then query the Gaia
Archive to retrieve the astrometric and radial velocity data required
to calculate the kinematics of the sample. We obtain radial velocities
for these faint stars by supplementing our sample with radial
velocities from (in order of priority) the California-Kepler Survey
(CKS; Petigura+, 2017, J/AJ/154/107), the Apache Point Observatory Galactic
Evolution Experiment (APOGEE; Majewski+, 2017, J/AJ/154/94 ) DR16, and the
Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 68 Ultra-short-period planet hosts
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
V/164 : LAMOST DR5 catalogs (Luo+, 2019)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/141/11 : Spitzer observations planet-host stars (Dodson-Robinson+, 2011)
J/AJ/142/176 : Exoplanet host stars. II. Speckle interferometry (Mason+, 2011)
J/A+A/566/A103 : Kepler planet host candidates imaging (Lillo-Box+, 2014)
J/ApJ/787/47 : 106 Kepler ultra-short-period planets (Sanchis-Ojeda+, 2014)
J/ApJ/788/L9 : Stellar parameters of KIC planet-host stars (Bastien+, 2014)
J/ApJ/791/35 : Detection of 715 Kepler planet candidates host stars (Law+,2014)
J/A+A/576/A94 : Northern bright planet host stars parameters (Sousa+, 2015)
J/AJ/153/136 : Planets & their host stars with Gaia parallaxes (Stassun+, 2017)
J/AJ/154/94 : APOGEE-2 data from DR16 (Majewski+, 2017)
J/AJ/154/107 : California-Kepler Survey (CKS). I. 1305 stars (Petigura+, 2017)
J/AJ/154/228 : Properties of transiting planet's host stars (Sandford+, 2017)
J/AJ/155/89 : California-Kepler Survey (CKS). IV. Planets (Petigura+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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4- 11 I8 --- KIC Kepler input catalog identifier
13- 20 A8 --- --- [Gaia DR2]
22- 40 A19 --- Gaia Gaia DR2 identifier
42- 48 F7.2 km/s RVel [-222/21.1] Radial Velocity
50- 54 F5.3 d Per [0.18/0.99] Planet Period
56- 60 F5.3 Rgeo Radp [0.69/2.58]? Planet Radius
62- 66 F5.3 Rgeo e_Radp [0.01/0.11]? Lower uncertainty on Rp
68- 72 F5.3 Rgeo E_Radp [0.01/0.09]? Upper uncertainty on Rp
74- 79 F6.3 Mgeo Massp [0.27/51]? Planet mass
81- 86 F6.3 Mgeo e_Massp [0.03/10.6]? Lower uncertainty on Mp
88- 93 F6.3 Mgeo E_Massp [0.03/11.8]? Upper uncertainty on Mp
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 10-Nov-2020