2024A&A...687A..48T

Query : 2024A&A...687A..48T

2024A&A...687A..48T - Astronomy and Astrophysics, volume 687A48 (2024/7-1)

TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system.

TIMMERMANS M., DRANSFIELD G., GILLON M., TRIAUD A.H.M.J., RACKHAM B.V., AGANZE C., BARKAOUI K., BRICENO C., BURGASSER A.J., COLLINS K.A., COINTEPAS M., DEVORA-PAJARES M., DUCROT E., ZUNIGA-FERNANDEZ S., HOWELL S.B., KALTENEGGER L., MURRAY C.A., PASS E.K., QUINN S.N., RAYMOND S.N., SEBASTIAN D., STASSUN K.G., ZIEGLER C., ALMENARA J.M., BENKHALDOUN Z., BONFILS X., CHRISTIANSEN J.L., DAVOUDI F., DE WIT J., DELREZ L., DEMORY B.-O., FONG W., FURESZ G., GHACHOUI M., GARCIA L.J., GOMEZ MAQUEO CHEW Y., HOOTON M.J., HORNE K., GUNTHER M.N., JEHIN E., JENKINS J.M., LAW N., MANN A.W., MURGAS F., POZUELOS F.J., PEDERSEN P.P., QUELOZ D., RICKER G., ROWDEN P., SCHWARZ R.P., SEAGER S., SMART R.L., SRDOC G., STRIEGEL S., THOMPSON S., VANDERSPEK R. and WINN J.N.

Abstract (from CDS):

Context. Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for atmospheric characterization, and even fewer are part of multiple star systems.
Aims. This work aims to validate TOI-4336 A b, a sub-Neptune-sized exoplanet candidate identified by the TESS space-based transit survey around a nearby M dwarf.
Methods. We validated the planetary nature of TOI-4336 A b through the global analysis of TESS and follow-up multi-band high-precision photometric data from ground-based telescopes, medium- and high-resolution spectroscopy of the host star, high-resolution speckle imaging, and archival images.
Results. The newly discovered exoplanet TOI-4336 A b has a radius of 2.1 ± 0.1 R⊕. Its host star is an M3.5-dwarf star with a mass of 0.33 ± 0.01 M⊙ and a radius of 0.33 ± 0.02 R⊙, and is a member of a hierarchical triple M-dwarf system 22 pc away from the Sun. The planet's orbital period of 16.3 days places it at the inner edge of the habitable zone of its host star, which is the brightest of the inner binary pair. The parameters of the system make TOI-4336 A b an extremely promising target for the detailed atmospheric characterization of a temperate sub-Neptune by transit transmission spectroscopy with JWST.

Abstract Copyright: © The Authors 2024

Journal keyword(s): techniques: photometric - planets and satellites: detection - planets and satellites: individual: TOI-4336 A b - stars: low-mass - planetary systems

Simbad objects: 11

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Number of rows : 11
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 NAME G 268-38b Pl 00 44 59.3309137511 -15 16 17.542839990           ~ 237 0
2 K2-18b Pl 11 30 14.5177445592 +07 35 18.255348492           ~ 303 0
3 TOI-1955.01 Pl? 13 44 25.0160273040 -40 20 12.162261984           ~ 2 0
4 TOI-1955 PM* 13 44 25.0160273040 -40 20 12.162261984       13.34   M3.5 14 1
5 TOI-4336b Pl 13 44 25.4772781536 -40 20 15.522177084           ~ 6 0
6 TOI-4336 PM* 13 44 25.4772781536 -40 20 15.522177084   14.49 12.89 13.12   M3.5 13 1
7 SIPS J1344-4018 PM* 13 44 27.5673811704 -40 18 40.024224576   16.37 14.73 14.27   M4.0 7 0
8 HD 124580 PM* 14 15 38.6850588480 -45 00 02.720144880   6.900 6.305     G0V 83 0
9 HD 130163 * 14 47 46.9396067376 -39 55 35.041449648   6.93 6.92     A1V 38 0
10 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 907 2
11 Kepler-231b Pl 19 35 53.6056683624 +50 31 54.842378196           ~ 31 0

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