J/AJ/164/96 SPIRou and IRD radial velocity of TOI-1452 (Cadieux+, 2022)
TOI-1452 b; SPIRou and TESS Reveal a Super-Earth in a Temperate Orbit Transiting
an M4 Dwarf.
Cadieux C., Doyon R., Plotnykov M., Hebrard G., Jahandar F., Artigau E.,
Valencia D., Cook N.J., Martioli E., Vandal T., Donati J.-F., Cloutier R.,
Narita N., Fukui A., Hirano T., Bouchy F., Cowan N.B., Gonzales E.J.,
Ciardi D.R., Stassun K.G., Arnold L., Benneke B., Boisse I., Bonfils X.,
Carmona A., Cortes-Zuleta P., Delfosse X., Forveille T., Fouque P.,
da Silva J.G., Jenkins J.M., Kiefer F., Kospal A., Lafreniere D.,
Martins J.H.C., Moutou C., do Nascimento J.-D.J., Ould-Elhkim M.,
Pelletier S., Twicken J.D., Bouma L.G., Cartwright S., Darveau-Bernier A.,
Grankin K., Ikoma M., Kagetani T., Kawauchi K., Kodama T., Kotani T.,
Latham D.W., Menou K., Ricker G., Seager S., Tamura M., Vanderspek R.,
Watanabe N.
<Astron. J., 164, 96 (2022)>
=2022AJ....164...96C 2022AJ....164...96C
ADC_Keywords: Exoplanets; Stars, M-type; Spectra, infrared; Radial velocities
Keywords: Exoplanets ; Super Earths ; M dwarf stars
Abstract:
Exploring the properties of exoplanets near or inside the radius
valley provides insight on the transition from the rocky super-Earths
to the larger, hydrogen-rich atmosphere mini-Neptunes. Here, we report
the discovery of TOI-1452b, a transiting super-Earth
(Rp=1.67±0.07R⊕) in an 11.1day temperate orbit
(Teq=326±7K) around the primary member (H=10.0, Teff=3185
±50K) of a nearby visual-binary M-dwarf. The transits were first
detected by the Transiting Exoplanet Survey Satellite, then
successfully isolated between the two 3.2" companions with
ground-based photometry from the Observatoire du Mont-Megantic and
MuSCAT3. The planetary nature of TOI-1452b was established through
high-precision velocimetry with the near-infrared SPIRou
spectropolarimeter as part of the ongoing SPIRou Legacy Survey. The
measured planetary mass (4.8±1.3M⊕) and inferred bulk
density (5.6-1.6+1.8g/cm3) is suggestive of a rocky core
surrounded by a volatile-rich envelope. More quantitatively, the mass
and radius of TOI-1452b, combined with the stellar abundance of
refractory elements (Fe, Mg, and Si) measured by SPIRou, is consistent
with a core-mass fraction of 18%±6% and a water-mass fraction of
22-13+21%. The water world candidate TOI-1452b is a prime target
for future atmospheric characterization with JWST, featuring a
transmission spectroscopy metric similar to other well-known temperate
small planets such as LHS1140b and K2-18b. The system is located near
Webb's northern continuous viewing zone, implying that is can be
followed at almost any moment of the year.
Description:
TOI-1452 was observed at 53 epochs from 2020 June 4 to 2020 October 8
with the near-infrared (0.98-2.5µm) SPIRou spectropolarimeter
mounted on the 3.6m Canada-France-Hawaii telescope (CFHT). R∼70000.
Seven high-resolution spectra of TOI-1452 were obtained with the
InfraRed Doppler (IRD) spectrograph on the Subaru 8.2m telescope
between 2020 September 26 and 2021 June 25. IRD covers the
near-infrared wavelengths between 970nm and 1730nm, with a spectral
resolution R∼70000.
Objects:
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RA (2000) DE Designation(s) (Period)
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19 20 41.73 +73 11 43.5 TOI-1452 = 2MASS J19204172+7311434 (P=11.06409d)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tabled1.dat 37 215 SPIRou and IRD radial velocity measurements
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/other/Sci/330.653 : Detected planets in the Eta-Earth Survey (Howard+, 2010)
J/ApJ/779/188 : Spectra of nearby late K and M Kepler stars (Mann+, 2013)
J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/A+A/566/A103 : Kepler planet host candidates imaging (Lillo-Box+, 2014)
J/ApJ/807/45 : Habitable planets orbiting M dwarfs (Dressing+, 2015)
J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+, 2015)
J/AJ/152/180 : Bolometric fluxes eclipsing binaries Tycho-2 (Stassun+, 2016)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/AJ/153/136 : Planets & host stars with Gaia parallaxes (Stassun+, 2017)
J/A+A/615/A69 : K2-3 system characterized with HARPSN & HARPS (Damasso+, 2018)
J/AJ/156/264 : California-Kepler Survey VII Planet radius gap (Fulton+, 2018)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/AJ/155/136 : Planets orbiting bright stars K2 campaigns 0-10 (Mayo+, 2018)
J/AJ/155/180 : A catalog of cool dwarf targets for the TESS (Muirhead+, 2018)
J/AJ/156/217 : Stellar properties for Mdwarfs in MEarth-South (Newton+, 2018)
J/AJ/155/89 : California-Kepler Survey (CKS). IV. Planets (Petigura+, 2018)
J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)
J/A+A/629/A111 : L 98-59 (TOI 175) HARPS observations (Cloutier+, 2019)
J/AJ/157/231 : MLSDSS-GaiaDR2 sample of M and L dwarfs (Kiman+, 2019)
J/ApJ/871/63 : How to constrain M dwarf. II. Nearby binaries (Mann+, 2019)
J/ApJ/875/29 : Spectroscopic analysis of the CKS sample. I. (Martinez+, 2019)
J/AJ/160/108 : Gaia-Kepler stellar properties. II. Planets (Berger+, 2020)
J/AJ/159/211 : Exoplanets parameters from Kepler and K2 (Cloutier+, 2020)
J/AJ/160/3 : Radial velocities M-dwarf LTT3780 with HARPS (Cloutier+, 2020)
J/AJ/160/22 : TOI-1235 Radial velocities & optical spectro (Cloutier+, 2020)
J/A+A/644/A127 : LP714-47 (TOI 442) radial velocity curve (Dreizler+, 2020)
J/ApJS/247/28 : K2 star parameter from Gaia & LAMOST (Hardegree-Ullman+, 2020)
J/A+A/642/A121 : LHS1140 radial velocity data (Lillo-Box+, 2020)
J/AN/341/996 : Stellar companions of (C)TOIs (Mugrauer+, 2020)
J/AJ/162/79 : HARPS radial velocity follow up of TOI-1634 (Cloutier+, 2021)
J/AJ/161/265 : Compared rotation periods 1189 CKS host stars (David+, 2021)
J/A+A/653/A41 : L 98-59 (TOI-175) ESPRESSO observations (Demangeon+, 2021)
J/ApJS/254/39 : Exoplanet candidates from TESS first 2yr obs (Guerrero+, 2021)
J/A+A/648/A48 : SPIRou wavelength calibration (Hobson+, 2021)
J/A+A/650/A201 : 10 parsec sample in the Gaia era (Reyle+, 2021)
J/A+A/660/A86 : Detection and characterization of TOI-1759 b (Martioli+, 2022)
Byte-by-byte Description of file: tabled1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Inst Instrument used (1)
8- 21 F14.6 d BJD [2459004/2459391] Barycentric Julian date
23- 31 F9.2 m/s RVel [-34006/17.2] Radial velocity (2)
33- 37 F5.2 m/s e_RVel [3/23] Uncertainty in RVel
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Note (1): Instruments as follows:
SPIRou = Spectro-Polarimetre Infra Rouge spectropolarimeter on the 3.6m
Canada-France-Hawaii telescope (208 occurrences)
IRD = InfraRed Doppler (IRD) spectrograph on the Subaru 8.2m telescope
(7 occurrences)
Note (2): The SPIRou radial velocities include the systemic velocity of the
host star, unlike IRD measurements where this component is already
subtracted. To analyse jointly these datasets, we allowed for an additive
offset for both instruments.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 14-Nov-2022