J/AJ/166/72 Known exoplanet hosts parameters with TESS (Simpson+, 2023)
Variability of Known Exoplanet Host Stars Observed by TESS.
Simpson E.R., Fetherolf T., Kane S.R., Pepper J., Mocnik T., Dalba P.A.
<Astron. J., 166, 72 (2023)>
=2023AJ....166...72S 2023AJ....166...72S
ADC_Keywords: Exoplanets; Stars, variable; Photometry, VRI;
Effective temperatures
Keywords: Exoplanet detection methods ; Exoplanets ; Periodic variable
stars ; Stellar activity ; Exoplanet systems ; Photometry ;
Time series analysis ; Stellar properties ; Hertzsprung Russell
diagram
Abstract:
Both direct and indirect methods of exoplanet detection rely upon
detailed knowledge of the potential host stars. Such stellar
characterization allows for accurate extraction of planetary
properties, as well as contributing to our overall understanding of
exoplanetary system architecture. In this analysis, we examine the
photometry of 264 known exoplanet host stars (harboring 337 planetary
companions) that were observed during the Transiting Exoplanet Survey
Satellite (TESS) Prime Mission. We identify periodic signatures in the
lightcurves of these stars and make possible connections to stellar
pulsations and their rotation periods, and compare the stellar
variability to the published planetary orbital periods. From these
comparisons, we quantify the effects of stellar variability on
exoplanet detection, confirming that exoplanets detection is biased
toward lower variability stars, but larger exoplanets dominate the
population of exoplanets around variable stars. Exoplanet detection
methods represented among these systems are distinct between stellar
spectral types across the main sequence, though notable outliers
exist. In addition, biases present in both the sourced data from TESS
and the host star selection process, which strongly influences the
representation of both stellar and planetary characteristics in the
final populations. We also determine whether the host stars
photometric variability affects or mimics the behavior or properties
of the system's planets. These results are discussed in the context of
how the behavior of the host star is responsible for how we observe
exoplanet characteristics, most notably their radii and atmospheric
properties, and how the activity may alter our measurements or impact
the evolution of planetary properties.
Description:
We utilize data from the TESS Prime Mission, which we briefly describe
here. The TESS spacecraft has a 13.7day orbit that is in a 2:1
resonance with the Moon and observes a 94x24deg segment of the sky
with its four optical CCD cameras in 27.4day increments. During its
Prime Mission (2018 July 25-2020 July 04), TESS observed ∼70% of the
sky at 30minutes cadence and targeted ∼230000 stars at 2minutes
cadence observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 175 337 Known hosts
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See also:
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/ApJ/704/1107 : Transiting planet cand. in HATNet field 205 (Latham+, 2009)
J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)
J/A+A/517/L1 : Radial velocities of WASP-8b planet (Queloz+, 2010)
J/ApJ/754/37 : HD 192263 radial velocities and photometry (Dragomir+, 2012)
J/ApJ/768/155 : Radial velocities & photometry HD38529 system (Henry+, 2013)
J/ApJ/763/L26 : SMARTS observations of eps Eridani (Metcalfe+, 2013)
J/MNRAS/436/1883 : Properties of KOI host stars (Walkowicz+, 2013)
J/MNRAS/447/1267 : Low-mass members of the Octans association (Murphy+, 2015)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/AJ/154/184 : Multiplicity of RV exoplanet host stars (Wittrock+, 2017)
J/AJ/156/234 : KELT transit false positive for TESS (Collins+, 2018)
J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diag (Gaia Collaboration, 2018)
J/AJ/160/129 : HARPS, HIRES & AAT Radial Velocities HD136352 (Kane+, 2020)
J/AJ/160/96 : CORALIE and PFS radial velocities of HD 86226 (Teske+, 2020)
J/AJ/160/155 : Light curve segments 22 host stars with TESS (Wong+, 2020)
J/other/NatAs/5.775 : nu2 Lupi CHEOPS light curves (Delrez+, 2021)
J/ApJS/254/39 : Exoplanet candidates from TESS 1st 2yr obs (Guerrero+, 2021)
J/AJ/161/171 : THYME. V. Discovering stars association (Tofflemire+, 2021)
J/AJ/162/127 : Lightcurve phases from 2nd yr TESS 1st mission (Wong+, 2021)
J/AJ/163/171 : The EXPRES Stellar Signals Project. II. RVel (Zhao+, 2022)
J/AJ/165/252 : HIRES radial velocity follow up of HD 17156 (Kane+, 2023)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- TIC TESS Input Catalog identifier
11- 35 A25 --- Host Host identifier
37- 64 A28 --- Planet Planet identifier
66- 83 F18.8 d Porb [0.35/402000000]? Orbital period
85-101 F17.7 d E_Porb [1e-07/470000000]? Upper uncertainty in Porb
103-120 F18.7 d e_Porb [1e-07/100000000]? Lower uncertainty in Porb
122-129 F8.5 d Pvar [0.01/12.7] Variability period
131-138 F8.6 d e_Pvar [4e-06/4] Uncertainty in Pvar
140-143 I4 K Teff [2873/9550]? Effective temperature
145-150 F6.2 K e_Teff [4/182]? Uncertainty in Teff
152-156 F5.3 [cm/s2] logg [3.66/5.08]? log surface gravity
158-162 F5.3 [cm/s2] e_logg [0.001/0.2]? Uncertainty in logg
164-169 F6.3 mag Vmag [3.23/17.8]? Apparent V band Vega magnitude
171-175 F5.3 mag e_Vmag [0.001/2]? Uncertainty in Vmag
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 12-Mar-2024