2024MNRAS.533.3893B

Query : 2024MNRAS.533.3893B

2024MNRAS.533.3893B - Mon. Not. R. Astron. Soc., 533, 3893-3906 (2024/October-1)

TOI-2379 b and TOI-2384 b: two super-Jupiter mass planets transiting low-mass host stars.

BRYANT E.M., BAYLISS D., HARTMAN J.D., SEDAGHATI E., HOBSON M.J., JORDAN A., BRAHM R., BAKOS G.A., ALMENARA J.M., BARKAOUI K., BONFILS X., COINTEPAS M., COLLINS K.A., DRANSFIELD G., EVANS P., GILLON M., JEHIN E., MURGAS F., POZUELOS F.J., SCHWARZ R.P., TIMMERMANS M., WATKINS C.N., WUNSCHE A., BUTLER R.P., CRANE J.D., SHECTMAN S., TESKE J.K., CHARBONNEAU D., ESSACK Z., JENKINS J.M., LEWIS H.M., SEAGER S., TING E.B. and WINN J.N.

Abstract (from CDS):

Short-period gas giant planets have been shown to be significantly rarer for host stars less massive than the Sun. We report the discovery of two transiting giant planets - TOI-2379 b and TOI-2384 b - with low-mass (early M) host stars. Both planets were detected using Transiting Exoplanet Survey Satellite photometry and for both the transit signal was validated using ground-based photometric facilities. We confirm the planetary nature of these companions and measure their masses using radial velocity observations. We find that TOI-2379 b has an orbital period of 5.469 d and a mass and radius of $5.76\pm 0.20$ M$_{J}$ and $1.046\pm 0.023$ R$_{J}$ and TOI-2384 b has an orbital period of 2.136 d and a mass and radius of $1.966\pm 0.059$ M$_{J}$ and $1.025\pm 0.021$ R$_{J}$. TOI-2379 b and TOI-2384 b have the highest and third highest planet-to-star mass ratios, respectively, out of all transiting exoplanets with a low-mass host star, placing them uniquely among the population of known exoplanets and making them highly important pieces of the puzzle for understanding the extremes of giant planet formation.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): planets and satellites: formation - planets and satellites: gaseous planets - planets and satellites: individual: TOI-2379 b - planets and satellites: individual: TOI-2384 b - stars: low-mass

Simbad objects: 8

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Number of rows : 8
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 ** TOI 2384B PM* 02 24 37.4333116803 -64 59 59.087681796           ~ 1 0
2 TOI-2384 PM* 02 24 37.4524795888 -64 59 59.888212083   16.561 15.154 14.675   ~ 7 0
3 TOI-2384b Pl 02 24 37.4541153747 -64 59 59.888440921           ~ 2 0
4 TOI-4201b Pl 06 01 53.9212150000 -13 27 41.029186668           ~ 20 0
5 CD-51 10924b Pl 17 30 11.2044753442 -51 38 13.130309109           ~ 26 1
6 Gaia DR3 6521531466700057856 * 23 52 18.6607882530 -53 02 17.340549340           ~ 1 0
7 TOI-2379b Pl 23 52 22.0627578240 -53 02 35.388503755           ~ 4 0
8 TOI-2379 * 23 52 22.0627578240 -53 02 35.388503755   17.010 15.340 15.035   ~ 6 0

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