2023AJ....166..201H

Query : 2023AJ....166..201H

2023AJ....166..201H - Astron. J., 166, 201 (2023/November-0)

TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica.

HOBSON M.J., TRIFONOV T., HENNING T., JORDAN A., ROJAS F., ESPINOZA N., BRAHM R., EBERHARDT J., JONES M.I., MEKARNIA D., KOSSAKOWSKI D., SCHLECKER M., TALA PINTO M., TORRES MIRANDA P.J., ABE L., BARKAOUI K., BENDJOYA P., BOUCHY F., BUTTU M., CARLEO I., COLLINS K.A., COLON K.D., CROUZET N., DRAGOMIR D., DRANSFIELD G., GASPARETTO T., GOEKE R.F., GUILLOT T., GUNTHER M.N., HOWARD S., JENKINS J.M., KORTH J., LATHAM D.W., LENDL M., LISSAUER J.J., MANN C.R., MIRELES I., RICKER G.R., SAESEN S., SCHWARZ R.P., SEAGER S., SEFAKO R., SHPORER A., STOCKDALE C., SUAREZ O., TAN T.-G., TRIAUD A.H.M.J., ULMER-MOLL S., VANDERSPEK R., WINN J.N., WOHLER B. and ZHOU G.

Abstract (from CDS):

We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr long transit, PEST, Hazelwood, and LCO; space photometry from NEOSSat; and radial velocities (RVs) from FEROS, HARPS, CORALIE, and CHIRON. Orbiting a late G-type star, TOI-199 b has a ${104.854}_{-0.002}^{+0.001}\,{\rm{day}}$ period, a mass of 0.17 ± 0.02MJ, and a radius of 0.810 ± 0.005RJ. It is the first warm exo-Saturn with a precisely determined mass and radius. The TESS and ASTEP transits show strong transit timing variations (TTVs), pointing to the existence of a second planet in the system. The joint analysis of the RVs and TTVs provides a unique solution for the nontransiting companion TOI-199 c, which has a period of ${273.69}_{-0.22}^{+0.26}\,{\rm{days}}$ and an estimated mass of ${0.28}_{-0.01}^{+0.02}\,{M}_{{\rm{J}}}$. This period places it within the conservative habitable zone.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy - Exoplanet detection methods - Transit timing variation method - Radial velocity - Transit photometry - Exoplanet systems

Simbad objects: 7

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Number of rows : 7
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-2202 * 03 24 54.8617645405 -73 57 27.263237472   13.902 12.988 12.818   ~ 25 0
2 CD-60 1144c Pl 05 20 25.3151625024 -59 53 44.463221376           ~ 1 0
3 CD-60 1144 PM* 05 20 25.3151625024 -59 53 44.463221376   11.59 10.70 10.16 9.957 ~ 27 0
4 CD-60 1144b Pl 05 20 25.3151625024 -59 53 44.463221376           ~ 8 0
5 Ross 1003 PM* 11 41 44.6358403057 +42 45 07.102117090   13.36 13.795 11.524 9.18 M4.0V 172 1
6 Kepler-46c Pl 19 17 04.4929642440 +42 36 15.041328444           ~ 18 1
7 Kepler-19b Pl 19 21 40.9995019176 +37 51 06.437281140           ~ 59 1

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