2025NatAs...9.1031B

Query : 2025NatAs...9.1031B

2025NatAs...9.1031B - Nature Astronomy, 9, 1031-1044 (2025/July-0)

A transiting giant planet in orbit around a 0.2-solar-mass host star.

BRYANT E.M., JORDAN A., HARTMAN J.D., BAYLISS D., SEDAGHATI E., BARKAOUI K., CHOUQAR J., POZUELOS F.J., THORNGREN D.P., TIMMERMANS M., ALMENARA J.M., CHILINGARIAN I.V., COLLINS K.A., GAN T., HOWELL S.B., NARITA N., PALLE E., RACKHAM B.V., TRIAUD A.H.M.J., BAKOS G.A., BRAHM R., HOBSON M.J., VAN EYLEN V., AMADO P.J., ARNOLD L., BONFILS X., BURDANOV A., CADIEUX C., CALDWELL D.A., CASANOVA V., CHARBONNEAU D., CLARK C.A., COLLINS K.I., DAYLAN T., DRANSFIELD G., DEMORY B.-O., DUCROT E., FERNANDEZ-RODRIGUEZ G., FUKUDA I., FUKUI A., GILLON M., GORE R., HOOTON M.J., IKUTA K., JEHIN E., JENKINS J.M., LEVINE A.M., LITTLEFIELD C., MURGAS F., NGUYEN K., PARVIAINEN H., QUELOZ D., SEAGER S., SEBASTIAN D., SRDOC G., VANDERSPEK R., WINN J.N., DE WIT J. and ZUNIGA-FERNANDEZ S.

Abstract (from CDS):

Planet formation models indicate that the formation of giant planets is substantially harder around low-mass stars due to the scaling of protoplanetary disc masses with stellar mass. The discovery of giant planets orbiting such low-mass stars thus imposes strong constraints on giant planet formation processes. Here we report the discovery of a transiting giant planet orbiting a 0.207 ± 0.011 M _ ⊙ _ star. The planet, TOI-6894 b, has a mass and radius of M P = 0.168 ± 0.022 M J (53.4 ± 7.1 M _ ⊕ _ ) and R P = 0.855 ± 0.022 R J and probably includes 12 ± 2 M _ ⊕ _ of metals. The discovery of TOI-6894 b highlights the need for a better understanding of giant planet formation mechanisms and the protoplanetary disc environments in which they occur. The extremely deep transits (17% depth) make TOI-6894 b one of the most accessible exoplanetary giants for atmospheric characterization observations, which will be key for fully interpreting the formation history of this notable system and for the study of atmospheric methane chemistry.


Abstract Copyright: 2025 The Author(s)

Journal keyword(s):

Simbad objects: 15

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Number of rows : 15
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 Wolf 47 PM* 01 03 19.8350070578 +62 21 55.837228636   15.34 13.21 12.4   M5V 232 0
2 NAME PM J01276+7217b Pl 01 27 40.9728637224 +72 17 47.186355408           ~ 15 0
3 GJ 9066 b Pl? 02 00 12.9563198327 +13 03 07.000569241           ~ 10 0
4 TOI-4201b Pl 06 01 53.9212150000 -13 27 41.029186668           ~ 20 0
5 NAME G 234-45b Pl 08 41 20.1286588424 +59 29 50.444062516           ~ 37 0
6 NAME G 234-45c Pl? 08 41 20.1286588424 +59 29 50.444062516           ~ 11 0
7 * p05 Leo * 11 13 45.5531027136 -00 04 10.208010072   5.374 5.404     A0V 82 0
8 TOI-6894 PM* 11 33 52.7494804376 +12 27 03.581709803           ~ 4 0
9 TOI-6894b Pl 11 33 52.7494804376 +12 27 03.581709803           ~ 2 0
10 NAME LP 224-38b Pl 16 06 33.7947592274 +40 54 22.040789471           ~ 3 0
11 NAME G 139-21b Pl 17 15 18.9339850845 +04 57 50.066612336           ~ 845 1
12 LSPM J1844+3633b Pl 18 44 42.3658884696 +36 33 44.530295652           ~ 16 0
13 TOI-1452b Pl 19 20 41.7258970920 +73 11 43.537714476           ~ 27 0
14 WASP-80b Pl 20 12 40.1693365800 -02 08 39.187438476           ~ 180 1
15 LSPM J2147+6245b Pl 21 47 24.7901788584 +62 45 13.903846920           ~ 26 0

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