2024A&A...687A.264B

Query : 2024A&A...687A.264B

2024A&A...687A.264B - Astronomy and Astrophysics, volume 687A264 (2024/7-1)

Three short-period Earth-sized planets around M dwarfs discovered by TESS: TOI-5720 b, TOI-6008 b, and TOI-6086 b.

BARKAOUI K., SCHWARZ R.P., NARITA N., MISTRY P., MAGLIANO C., HIRANO T., MAITY M., BURGASSER A.J., RACKHAM B.V., MURGAS F., POZUELOS F.J., STASSUN K.G., EVERETT M.E., CIARDI D.R., LAMMAN C., PASS E.K., BIERYLA A., AGANZE C., ESPARZA-BORGES E., COLLINS K.A., COVONE G., DE LEON J., DEVORA-PAJARES M., DE WIT J., FUKUDA I., FUKUI A., GERASIMOV R., GILLON M., HAYASHI Y., HOWELL S.B., IKOMA M., IKUTA K., JENKINS J.M., KARPOOR P.R., KAWAI Y., KIMURA T., KOTANI T., LATHAM D.W., MORI M., PALLE E., PARVIAINEN H., PATEL Y.G., RICKER G., RELLES H.M., SHPORER A., SEAGER S., SOFTICH E., SRDOC G., TAMURA M., THEISSEN C.A., TWICKEN J.D., VANDERSPEK R., WATANABE N., WATKINS C.N., WINN J.N. and WOHLER B.

Abstract (from CDS):

One of the main goals of the NASA Transiting Exoplanet Survey Satellite (TESS) mission is the discovery of Earth-like planets around nearby M-dwarf stars. We present the discovery and validation of three new short-period Earth-sized planets orbiting nearby M dwarfs: TOI-5720 b, TOI-6008 b, and TOI-6086 b. We combined TESS data, ground-based multicolor light curves, ground-based optical and near-infrared spectroscopy, and Subaru/IRD radial velocity data to validate the planetary candidates and constrain the physical parameters of the systems. In addition, we used archival images, high-resolution imaging, and statistical validation techniques to support the planetary validation. TOI-5720 b is an Earth-sized planet with a radius of R_p = 1.09 ± 0.07 R_⊕. It orbits a nearby (36 pc) M 2.5 host with an orbital period of P = 1.4344555 ± 0.0000036 days. It has an equilibrium temperature of T_eq = 708 ± 19 K (assuming a null albedo) and an incident flux of S_p = 41.7 ± 4.5 S_⊕. TOI-6008 b is a short-period planet of P = 0.8574347 ± 0.0000424 day. It has a radius of R_p = 1.03 ± 0.05 R_⊕, an equilibrium temperature of T_eq = 707 ± 19 K, and an incident flux of S_p = 41.5 ± 4.5 S_⊕. The host star (TOI-6008) is a nearby (23 pc) M 5 with an effective temperature of T_eff = 3075 ± 75 K. Based on the radial velocity measurements collected with Subaru/IRD, we set a 3σ upper limit of M_p < 4 M_⊕, thus ruling out a star or brown dwarf as the transiting companion. TOI-6086 b orbits its nearby (32 pc) M 3 host star (T_eff = 3200 ± 75 K) every 1.3888725 ± 0.0000827 days and has a radius of R_p = 1.18 ± 0.07 R_⊕, an equilibrium temperature of T_eq = 634 ± 16 K, and an incident flux of S_p = 26.8 ± 2.7 S_⊕. Additional high-precision radial velocity measurements are needed to derive the planetary masses and bulk densities and to search for additional planets in the systems. Moreover, short-period Earth-sized planets orbiting around nearby M dwarfs are suitable targets for an atmospheric characterization with the James Webb Space Telescope through transmission and emission spectroscopy and phase-curve photometry.

Abstract Copyright: © The Authors 2024

Journal keyword(s): techniques: photometric - techniques: radial velocities - stars: individual: TOI-5720 - stars: individual: TOI-6008 - stars: individual: TOI-6086

Simbad objects: 58

Full paper

View the references in ADS

Number of rows : 58

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2026	#notes
1	NAME G 268-38c	Pl	00 44 59.3309137511	-15 16 17.542839990				~	95	0
2	LSPM J0106+1913b	Pl	01 06 36.9754315896	+19 13 33.163383396				~	21	0
3	TOI-2445b	Pl	02 53 15.8178350377	+00 03 08.779046896				~	13	0
4	NAME G 245-61b	Pl	02 57 18.2595506687	+76 33 11.253543067				~	41	0
5	NAME BD-17 588Ab	Pl	03 01 51.3936681048	-16 35 36.031178525				~	85	0
6	NAME BD-17 588Ac	Pl?	03 01 51.3936681048	-16 35 36.031178525				~	38	0
7	K2-89b	Pl	03 48 16.0102157808	+20 27 34.683025716				~	13	0
8	K2-91b	Pl	04 12 52.3275335616	+24 12 18.387456228				~	11	0
9	NAME L 375-2b	Pl	04 32 42.6349227751	-39 47 12.150012739				~	19	0
10	NAME L 231-32b	Pl	04 33 39.7200127728	-51 57 22.435373160				~	49	0
11	TOI-206b	Pl	04 54 56.9355768864	-62 31 20.465084568				~	7	0
12	NAME UPM J0505-4756b	Pl	05 05 14.4284259960	-47 56 15.526276908				~	25	0
13	NAME G 50-16b	Pl	08 02 22.8829177661	+03 20 19.691170937				~	30	0
14	NAME L 98-59 b	Pl	08 18 07.6214406393	-68 18 46.805365587				~	67	0
15	NAME L 98-59 c	Pl	08 18 07.6214406393	-68 18 46.805365587				~	86	0
16	NAME L 678-39b	Pl	09 36 01.6372169407	-21 39 38.877606712				~	86	0
17	CD-45 5378b	Pl	09 44 29.8367689785	-45 46 35.427639685				~	86	0
18	TOI-5747.01	Pl?	09 53 30.9082873440	+35 34 16.718737548				~	7	0
19	NAME L 320-124b	Pl	10 14 51.7786855411	-47 09 24.192778106				~	223	0
20	NAME G 162-44b	Pl	10 18 35.1372361341	-11 43 00.243355403				~	44	0
21	NAME LP 791-18b	Pl	11 02 45.9546199392	-16 24 22.288196376				~	21	0
22	LP 791-18	PM*	11 02 45.9546199392	-16 24 22.288196376				M6V	50	0
23	G 120-35	PM*	11 21 15.6585967689	+25 16 25.277672380	15.527	13.878	13.541	K3	14	0
24	NAME G 120-35b	Pl	11 21 15.6585967689	+25 16 25.277672380				~	3	0
25	SDSS J112115.76+251529.3	*	11 21 15.7644571066	+25 15 29.288213113				~	1	0
26	Wolf 437b	Pl	12 47 56.6245693190	+09 45 05.035666747				~	95	0
27	K2-316b	Pl	15 34 29.9364663399	-23 15 33.075870537				~	5	0
28	2MASS J17412802+3018371	*	17 41 28.0240780102	+30 18 37.120262653				~	1	0
29	TOI-6086b	Pl	17 41 29.0340606953	+30 18 13.558910122				~	3	0
30	TOI-6086	PM*	17 41 29.0340606953	+30 18 13.558910122	16.820	15.049	14.689	dM4.0	5	0
31	2MASS J17413056+3018378	*	17 41 30.5581272605	+30 18 37.852110886				~	1	0
32	UCAC4 602-058243	*	17 41 32.2754649320	+30 17 56.366309267	14.637	13.941	13.757	~	1	0
33	TYC 2606-1600-1	SB*	17 41 35.8028127360	+30 19 31.897342272	11.99	11.03		~	2	0
34	Kepler-1855b	Pl	18 53 36.465816	+41 30 58.81212				~	21	0
35	Kepler-732c	Pl	18 54 55.6759065456	+45 57 31.522444992				~	29	0
36	Kepler-1971b	Pl	19 09 02.9183523984	+42 01 56.227348812				~	12	0
37	NAME G 261-1b	Pl	19 09 09.7936452640	+74 10 20.222270099				~	11	0
38	Kepler-42c	Pl	19 28 52.5688740811	+44 37 08.989819665				~	55	1
39	Kepler-42b	Pl	19 28 52.5688740811	+44 37 08.989819665				~	46	1
40	K2-147b	Pl	19 35 19.9648124448	-28 29 52.223840916				~	5	0
41	NAME L 210-70b	Pl	20 27 42.0813992356	-56 27 25.151894071				~	68	0
42	UCAC4 699-080277	*	20 41 43.6994848011	+49 38 36.611233744	14.621	13.017	12.544	~	1	0
43	2MASS J20414707+4938344	*	20 41 47.0773907460	+49 38 34.498335035				~	1	0
44	2MASS J20414733+4938545	*	20 41 47.3458654113	+49 38 54.781784361				~	1	0
45	LSPM J2041+4938	PM*	20 41 47.4435771816	+49 38 48.149672352	17.4		14.3	dM6.5	15	0
46	LSPM J2041+4938b	Pl	20 41 47.4435771816	+49 38 48.149672352				~	3	0
47	2MASS J20414800+4938350	*	20 41 48.0149049547	+49 38 34.936373639				~	1	0
48	2MASS J20414833+4938381	*	20 41 48.3489695522	+49 38 37.995882748				~	1	0
49	UCAC4 699-080295	*	20 41 48.7461097969	+49 38 08.081421877	13.509	13.153	13.261	~	1	0
50	BD+44 3567b	Pl	20 45 04.0992448490	+44 29 56.645139366				~	17	0
51	NAME L 119-213b	Pl	22 41 58.1171811377	-69 10 08.320741850				~	146	0
52	TRAPPIST-1b	Pl	23 06 29.3684948589	-05 02 29.037301866				~	380	0
53	TRAPPIST-1e	Pl	23 06 29.3684948589	-05 02 29.037301866				~	384	0
54	TRAPPIST-1g	Pl	23 06 29.3684948589	-05 02 29.037301866				~	237	0
55	TRAPPIST-1c	Pl	23 06 29.3684948589	-05 02 29.037301866				~	282	0
56	TRAPPIST-1h	Pl	23 06 29.3684948589	-05 02 29.037301866				~	162	0
57	TRAPPIST-1f	Pl	23 06 29.3684948589	-05 02 29.037301866				~	281	0
58	TRAPPIST-1d	Pl	23 06 29.3684948589	-05 02 29.037301866				~	263	0

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