2024A&A...683A.166A

Query : 2024A&A...683A.166A

2024A&A...683A.166A - Astronomy and Astrophysics, volume 683A166 (2024/3-1)

TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf.

ALMENARA J.M., BONFILS X., BRYANT E.M., JORDAN A., HEBRARD G., MARTIOLI E., CORREIA A.C.M., ASTUDILLO-DEFRU N., CADIEUX C., ARNOLD L., ARTIGAU E., BAKOS G.A., BARROS S.C.C., BAYLISS D., BOUCHY F., BOUE G., BRAHM R., CARMONA A., CHARBONNEAU D., CIARDI D.R., CLOUTIER R., COINTEPAS M., COOK N.J., COWAN N.B., DELFOSSE X., DO NASCIMENTO J.D., DONATI J.-F., DOYON R., FORVEILLE T., FOUQUE P., GAIDOS E., GILBERT E.A., GOMES DA SILVA J., HARTMAN J.D., HESSE K., HOBSON M.J., JENKINS J.M., KIEFER F., KOSTOV V.B., LASKAR J., LENDL M., L'HEUREUX A., MARTINS J.H.C., MENOU K., MOUTOU C., MURGAS F., POLANSKI A.S., RAPETTI D., SEDAGHATI E. and SHANG H.

Abstract (from CDS):

We report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d = 80.4pc, G = 15.1 mag, K=11.2mag, R* = 0.358 ± 0.015 R⊙, M* = 0.340 ± 0.009 M⊙). Using the photometric time series from TESS sectors 10, 36, 46, and 63 and near-infrared spectrophotometry from ExTrA, we measured a planetary radius of 0.77 ± 0.03 RJ and an orbital period of 1.52 days. With high-resolution spectroscopy taken by the CFHT/SPIRou and ESO/ESPRESSO spectrographs, we refined the host star parameters ([Fe/H] = 0.27 ± 0.12) and measured the mass of the planet (0.273 ± 0.006 MJ). Based on these measurements, TOI-4860 b joins the small set of massive planets (>80 ME) found around mid to late M dwarfs (<0.4 R⊙), providing both an interesting challenge to planet formation theory and a favourable target for further atmospheric studies with transmission spectroscopy. We identified an additional signal in the radial velocity data that we attribute to an eccentric planet candidate (e = 0.66 ± 0.09) with an orbital period of 427 ± 7 days and a minimum mass of 1.66 ± 0.26 MJ, but additional data would be needed to confirm this.

Abstract Copyright: © The Authors 2024

Journal keyword(s): techniques: photometric - techniques: radial velocities - stars: individual: TOI-4860 - stars: low-mass - planetary systems

VizieR on-line data: <Available at CDS (J/A+A/683/A166): tablea2.dat>

Simbad objects: 24

goto Full paper

goto View the references in ADS

Number of rows : 24
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 PM J01276+7217b Pl 01 27 40.9728637224 +72 17 47.186355408           ~ 15 0
2 TOI-3714b Pl 04 38 12.5354290272 +39 27 29.909322841           ~ 28 0
3 TOI-4680 * 05 28 37.6826517248 -27 01 54.265901497   14.351   13.741   ~ 2 0
4 TOI-3757b Pl 06 04 00.8904203305 +55 01 12.593823805           ~ 24 0
5 TOI-519b Pl 08 18 25.6680189408 -19 39 46.501007184           ~ 28 0
6 TOI-519 PM* 08 18 25.6680189408 -19 39 46.501007184   17.869 17.350     M2.5V 21 0
7 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
8 SCR J1212-1255 PM* 12 12 31.4479107816 -12 55 15.403953540   14.40   12.28 11.25 ~ 4 0
9 SCR J1213-1243A PM* 12 13 07.6664878536 -12 43 31.896119568   15.53   13.32 12.18 ~ 4 0
10 TOI-4860b Pl 12 14 15.5387346775 -13 10 29.343709503           ~ 14 0
11 TOI-4860 PM* 12 14 15.5387346775 -13 10 29.343709503       16.202   M3.5V 12 0
12 2MASS J12145957-1303121 * 12 14 59.57976 -13 03 12.1428           ~ 1 0
13 2MASS J12154216-1243286 * 12 15 42.16752 -12 43 28.6104           ~ 1 0
14 NAME UPM J1349-4603b Pl 13 49 53.9776609320 -46 03 58.454133372           ~ 21 0
15 UPM J1349-4603 PM* 13 49 53.9776609320 -46 03 58.454133372   16.5   14.5 12.6 M4 20 0
16 WASP-103b Pl 16 37 15.5765824488 +07 11 00.109678740           ~ 215 1
17 LSPM J1844+3633b Pl 18 44 42.3658884696 +36 33 44.530295652           ~ 16 0
18 TOI-1452b Pl 19 20 41.7258970920 +73 11 43.537714476           ~ 27 0
19 TOI-5205 PM* 20 55 04.9163832653 +24 21 38.710082580       14.655   M4.5V 12 0
20 TOI-5205b Pl 20 55 04.9163832653 +24 21 38.710082580           ~ 25 0
21 LSPM J2147+6245b Pl 21 47 24.7901788584 +62 45 13.903846920           ~ 26 0
22 BD-15 6290b Pl 22 53 16.7325836486 -14 15 49.304052185           ~ 266 1
23 * 51 Peg b Pl 22 57 27.9804852576 +20 46 07.797040104           ~ 744 1
24 Ross 248 BY* 23 41 55.0363002516 +44 10 38.818911116   14.19   11.1   M5.0V 361 0

To bookmark this query, right click on this link: simbad:objects in 2024A&A...683A.166A and select 'bookmark this link' or equivalent in the popup menu