J/AJ/167/153 TESS-Keck Survey. XII. TOI-1347 radial velocity (Rubenzahl+, 2024)
The TESS-Keck Survey.
XII. A Dense 1.8 R⊕ Ultra-short-period Planet Possibly Clinging to a
High-mean-molecular-weight Atmosphere after the First Gigayear.
Rubenzahl R.A., Dai F., Howard A.W., Lissauer J.J., Van Zandt J.,
Beard C., Giacalone S., Murphy J.M.A., Chontos A., Lubin J.,
Brinkman C.L., Tyler D., MacDougall M.G., Rice M., Dalba P.A., Mayo A.W.,
Weiss L.M., Polanski A.S., Blunt S., Yee S.W., Hill M.L., Angelo I.,
Turtelboom E.V., Holcomb R., Behmard A., Pidhorodetska D., Batalha N.M.,
Crossfield I.J.M., Dressing C., Fulton B., Huber D., Isaacson H.,
Kane S.R., Petigura E.A., Robertson P., Scarsdale N., Mocnik T.,
Fetherolf T., Malavolta L., Mortier A., Fiorenzano A., Pedani M.
<Astron. J., 167, 153 (2024)>
=2024AJ....167..153R 2024AJ....167..153R
ADC_Keywords: Exoplanets; Spectra, optical; Radial velocities
Keywords: Exoplanet astronomy ; Radial velocity ; Transit photometry ;
Exoplanet atmospheres ; Super Earths ; Exoplanet detection
methods
Abstract:
The extreme environments of ultra-short-period planets (USPs) make
excellent laboratories to study how exoplanets obtain, lose, retain,
and/or regain gaseous atmospheres. We present the confirmation and
characterization of the USP TOI-1347b, a 1.8±0.1R⊕ planet on
a 0.85day orbit that was detected with photometry from the TESS
mission. We measured radial velocities of the TOI-1347 system using
Keck/HIRES and HARPS-N and found the USP to be unusually massive at
11.1±1.2M⊕. The measured mass and radius of TOI-1347b imply
an Earth-like bulk composition. A thin H/He envelope (>0.01% by mass)
can be ruled out at high confidence. The system is between 1 and
1.8Gyr old; therefore, intensive photoevaporation should have
concluded. We detected a tentative phase-curve variation (3σ)
and a secondary eclipse (2σ) in TESS photometry, which, if
confirmed, could indicate the presence of a high-mean-molecular-weight
atmosphere. We recommend additional optical and infrared observations
to confirm the presence of an atmosphere and investigate its
composition.
Description:
We collected 120 high-resolution optical spectra of TOI-1347 between
UT 2019 November 28 and UT 2022 July 26 with HIRES on the Keck I
telescope as part of TKS. We took exposures using the "C2" decker
(R=45000).
We also obtained 14 spectra with the HARPS-N , installed at the
Telescopio Nazionale Galileo. Observations were taken with 1800s
exposure times (average S/N is 42.3 in order 50) with simultaneous
wavelength calibration provided by the Fabry-Perot etalon.
Objects:
---------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
---------------------------------------------------------------
18 41 18.42 +70 17 23.7 TOI-1347 = TIC 229747848 (P<1d)
---------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 46 134 TOI-1347 radial velocities and S-Indices
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See also:
III/159 : Ca II H and K Measurements Made at MWO (Duncan+ 1991)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)
J/ApJ/790/146 : Planets Kepler's multi-transiting systems (Fabrycky+, 2014)
J/ApJ/787/47 : 106 Kepler ultra-short-period planets (Sanchis-Ojeda+, 2014)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/MNRAS/472/1618 : Kepler study of starspot lifetimes (Giles+, 2017)
J/ApJ/844/102 : KIC parallaxes from asteroseismology vs Gaia (Huber+, 2017)
J/ApJ/855/115 : Lithium abundances of KOIs from CKS spectra (Berger+, 2018)
J/AJ/155/107 : HARPS-N obs of K2-141 planetary system (Malavolta+, 2018)
J/AJ/159/280 : Gaia-Kepler stellar properties.I. KIC stars (Berger+, 2020)
J/A+A/648/A103 : Thorium line list (Dumusque+, 2021)
J/ApJS/254/39 : Exoplanet candidates from TESS 1st 2yr obs (Guerrero+, 2021)
J/AJ/161/56 : The TESS-Keck Survey. II. RVs of TOI-561 (Weiss+, 2021)
J/A+A/668/A158 : HD 20329 Radial velocity & activity indices (Murgas+, 2022)
J/AJ/166/62 : New HIRES radial velocity data for V1298 Tau (Blunt+, 2023)
J/AJ/166/33 : TESS-Keck Survey. XV. 108 TESS Planets (MacDougall+, 2023)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d-- BJD [2e+06/3e+06] Barycentric Julian Date of
Observation (BJD-2457000)
16- 22 F7.3 m/s RVel [-30/36] Radial velocity (1)
24- 27 F4.2 m/s e_RVel [1/5] Error on RVel
29- 33 F5.3 --- SHK [0/0.34]? SHK Index
35- 38 F4.3 --- e_SHK [0.001]? Error on SHK
40- 46 A7 --- Instr Instrument used (HARPS-N or HIRES)
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Note (1): A median value of -13965.395km/s has been subtracted from
the HARPS-N RVels
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History:
From electronic version of the journal
References:
Dalba+, Paper I: 2020AJ....159..241D 2020AJ....159..241D Cat. J/AJ/159/241
Weiss+, Paper II: 2021AJ....161...56W 2021AJ....161...56W Cat. J/AJ/161/56
Dai+, Paper III: 2020AJ....160..193D 2020AJ....160..193D
Rubenzahl+, Paper IV: 2021AJ....161..119R 2021AJ....161..119R Cat. J/AJ/161/119
Scarsdale+, Paper V: 2021AJ....162..215S 2021AJ....162..215S Cat. J/AJ/162/215
MacDougall+, Paper VI: 2021AJ....162..265M 2021AJ....162..265M Cat. J/AJ/162/265
Dalba+, Paper VIII: 2022AJ....163...61D 2022AJ....163...61D Cat. J/AJ/163/61
Lubin+, Paper IX: 2022AJ....163..101L 2022AJ....163..101L Cat. J/AJ/163/101
Turtelboom+, Paper XI: 2022AJ....163..293T 2022AJ....163..293T Cat. J/AJ/163/293
MacDougall+, Paper XIII: 2022AJ....164...97M 2022AJ....164...97M Cat. J/AJ/164/97
Van Zandt+, Paper XIV: 2023AJ....165...60V 2023AJ....165...60V Cat. J/AJ/165/60
MacDougall+, Paper XV : 2023AJ....166...33M 2023AJ....166...33M Cat. J/AJ/166/33
(End) Prepared by Coralie fix [CDS], 04-Jun-2024