J/AJ/165/167 HARPS-N radial velocities of TOI-1695 (Cherubim+, 2023)
TOI-1695 b; A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley.
Cherubim C., Cloutier R., Charbonneau D., Stockdale C., Stassun K.G.,
Schwarz R.P., Safonov B., Mortier A., Lewin P., Latham D.W., Horne K.,
Haywood R.D., Gonzales E., Goliguzova M.V., Collins K.A., Ciardi D.R.,
Bieryla A., Belinski A.A., Wohler B., Watson C.A., Vanderspek R., Udry S.,
Sozzetti A., Segransan D., Sasselov D., Ricker G.R., Rice K., Poretti E.,
Piotto G., Pepe F., Molinari E., Micela G., Mayor M., Lovis C.,
Lopez-Morales M., Jenkins J.M., Essack Z., Dumusque X., Doty J.P.,
Colon K.D., Cameron A.C., Buchhave L.A.
<Astron. J., 165, 167 (2023)>
=2023AJ....165..167C 2023AJ....165..167C
ADC_Keywords: Exoplanets; Stars, M-type; Spectra, optical; Radial velocities
Keywords: Exoplanets ; Exoplanet formation ; Planet formation ; Exoplanet
evolution ; M dwarf stars ; Exoplanet atmospheric evolution ;
Transit photometry ; Radial velocity ; Stellar properties
Abstract:
Characterizing the bulk compositions of transiting exoplanets within
the M-dwarf radius valley offers a unique means to establish whether
the radius valley emerges from an atmospheric mass-loss process or is
imprinted by planet formation itself. We present the confirmation of
such a planet orbiting an early M-dwarf (Tmag=11.0294±0.0074,
Ms=0.513±0.012M☉, Rs=0.515±0.015R☉, and
Teff=3690±50K): TOI-1695b (P=3.13 days and
Rp=1.90-0.14+0.16R⊕). TOI-1695b's radius and orbital period
situate the planet between model predictions from thermally driven
mass loss versus gas depleted formation, offering an important test
case for radius valley emergence models around early-M dwarfs. We
confirm the planetary nature of TOI-1695b based on five sectors of
TESS data and a suite of follow-up observations including 49 precise
radial velocity measurements taken with the HARPS-N spectrograph. We
measure a planetary mass of 6.36±1.00M⊕, which reveals that
TOI-1695b is inconsistent with a purely terrestrial composition of
iron and magnesium silicate, and instead is likely a water-rich
planet. Our finding that TOI-1695b is not terrestrial is inconsistent
with the planetary system being sculpted by thermally driven mass
loss. We present a statistical analysis of seven well-characterized
planets within the M-dwarf radius valley demonstrating that a
thermally driven mass-loss scenario is unlikely to explain this
population.
Description:
Objects:
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RA (2000) DE Designation(s) (Period)
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01 27 40.97 +72 17 47.1 TOI1695 = TIC 422756130 (3.13d)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig5.dat 45 46 TOI-1695 HARPS-N radial velocities
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See also:
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
J/A+A/468/1115 : Thorium and argon lines in the visible (Lovis+, 2007)
J/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)
J/ApJS/200/15 : HARPS-TERRA project. I. (Anglada-Escude+, 2012)
J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/A+A/575/A119 : HARPS RV and stellar activity (Astudillo-Defru+, 2015)
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 (Sullivan+, 2015)
J/MNRAS/457/2877 : Kepler M dwarf stars revised properties (Gaidos+, 2016)
J/ApJ/821/93 : Rotation & Galactic kinematics mid M dwarfs (Newton+, 2016)
J/AJ/152/180 : Bolometric fluxes eclipsing binaries Tycho2 (Stassun+, 2016)
J/A+A/600/A13 : HARPS Mdwarf magnetic activity (Astudillo-Defru+, 2017)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/AJ/153/71 : Kepler follow-up observation program. I. (Furlan+, 2017)
J/AJ/153/136 : Planets & host stars with Gaia parallaxes (Stassun+, 2017)
J/AJ/156/264 : California-Kepler Survey. VII. Planet radius (Fulton+, 2018)
J/AJ/155/136 : Planets orbiting bright star K2 campaigns 0-10 (Mayo+, 2018)
J/AJ/156/18 : APOGEE DR14 Binary comp evolved stars (Price-Whelan+, 2018)
J/ApJ/871/63 : How to constrain your M dwarf. II. Nearby bin (Mann+, 2019)
J/ApJ/875/29 : Spectroscopic analysis of 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/160/22 : TOI1235 Radial velocity & optical spectro (Cloutier+, 2020)
J/AJ/159/100 : Flux & RVs of dwarf G9-40 with K2 & HPF (Stefansson+, 2020)
J/AJ/162/174 : HARPS radial velocity follow up of GJ 1214 (Cloutier+, 2021)
J/AJ/162/79 : HARPS radial velocity follow up of TOI1634 (Cloutier+, 2021)
J/ApJS/254/39 : Exoplanet candidates from TESS 1st 2yr obs (Guerrero+, 2021)
J/AJ/164/96 : SPIRou and IRD radial velocity of TOI-1452 (Cadieux+, 2022)
J/other/Sci/377.1211 : RV and LC of 8 M dwarf stars with planets (Luque+, 2022)
Byte-by-byte Description of file: fig5.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d BJD [2459190/2459589] Barycentric Julian Date at TDB
13- 25 F13.9 m/s RVel [-15.4/10.6] Radial velocity
27- 37 F11.9 m/s e_RVel [1/4] Uncertainty in RVel
39- 45 A7 --- Instr Instrument; HARPS-N
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 06-Sep-2023