2022MNRAS.514.4120G

Query : 2022MNRAS.514.4120G

2022MNRAS.514.4120G - Mon. Not. R. Astron. Soc., 514, 4120-4139 (2022/August-2)

TESS discovery of a sub-Neptune orbiting a mid-M dwarf TOI-2136.

GAN T., SOUBKIOU A., WANG S.X., BENKHALDOUN Z., MAO S., ARTIGAU E., FOUQUE P., ARNOLD L., GIACALONE S., THEISSEN C.A., AGANZE C., BURGASSER A., COLLINS K.A., SHPORER A., BARKAOUI K., GHACHOUI M., HOWELL S.B., LAMMAN C., DEMANGEON O.D.S., BURDANOV A., CADIEUX C., CHOUQAR J., COLLINS K.I., COOK N.J., DELREZ L., DEMORY B.-O., DOYON R., DRANSFIELD G., DRESSING C.D., DUCROT E., FAN J., GARCIA L., GILL H., GILLON M., GNILKA C.L., GOMEZ MAQUEO CHEW Y., GUNTHER M.N., HENZE C.E., HUANG C.X., JEHIN E., JENSEN E.L.N., LIN Z., MANSET N., McCORMAC J., MURRAY C.A., NIRAULA P., PEDERSEN P.P., POZUELOS F.J., QUELOZ D., RACKHAM B.V., SAVEL A.B., SCHANCHE N., SCHWARZ R.P., SEBASTIAN D., THOMPSON S., TIMMERMANS M., TRIAUD A.H.M.J., VEZIE M., WELLS R.D., DE WIT J., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N. and JENKINS J.M.

Abstract (from CDS):

We present the discovery of TOI-2136 b, a sub-Neptune planet transiting a nearby M4.5V-type star every 7.85 d, identified through photometric measurements from the Transiting Exoplanet Survey Satellite (TESS) mission. The host star is located 33 pc away with a radius of R* = 0.34 ± 0.02 R☉, a mass of 0.34 ±0.02 M☉, and an effective temperature of 3342 ± 100 K. We estimate its stellar rotation period to be 75 ± 5 d based on archival long-term photometry. We confirm and characterize the planet based on a series of ground-based multiwavelength photometry, high-angular-resolution imaging observations, and precise radial velocities from Canada-France-Hawaii Telescope (CFHT)/SpectroPolarimetre InfraROUge (SPIRou). Our joint analysis reveals that the planet has a radius of 2.20 ± 0.17 R⊕ and a mass of 6.4 ± 2.4 M⊕. The mass and radius of TOI-2136 b are consistent with a broad range of compositions, from water-ice to gas-dominated worlds. TOI-2136 b falls close to the radius valley for M dwarfs predicted by thermally driven atmospheric mass-loss models, making it an interesting target for future studies of its interior structure and atmospheric properties.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): planets and satellites: detection - stars: individual: TIC 336128819 - TOI-2136 - planetary systems

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Gaia DR3 2096535788163295744 * 18 44 41.1556827785 +36 33 17.523693360           ~ 1 0
2 LSPM J1844+3633 PM* 18 44 42.3658884696 +36 33 44.530295652   15.1   13.4   ~ 28 0
3 LSPM J1844+3633b Pl 18 44 42.3658884696 +36 33 44.530295652           ~ 16 0
4 HD 174567 * 18 49 44.0870486208 +31 37 46.054879392   6.615 6.632     A0Vs 66 0

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