2021A&A...656A.124K

Query : 2021A&A...656A.124K

2021A&A...656A.124K - Astronomy and Astrophysics, volume 656A, 124-124 (2021/12-1)

TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf.

KOSSAKOWSKI D., KEMMER J., BLUHM P., STOCK S., CABALLERO J.A., BEJAR V.J.S., GUILLEN C.C., LODIEU N., COLLINS K.A., OSHAGH M., SCHLECKER M., ESPINOZA N., PALLE E., HENNING T., KREIDBERG L., KURSTER M., AMADO P.J., ANDERSON D.R., MORALES J.C., CARTWRIGHT S., CHARBONNEAU D., CHATURVEDI P., CIFUENTES C., CONTI D.M., CORTES-CONTRERAS M., DREIZLER S., GALADI-ENRIQUEZ D., GUERRA P., HART R., HELLIER C., HENZE C., HERRERO E., JEFFERS S.V., JENKINS J.M., JENSEN E.L.N., KAMINSKI A., KIELKOPF J.F., KUNIMOTO M., LAFARGA M., LATHAM D.W., LILLO-BOX J., LUQUE R., MOLAVERDIKHANI K., MONTES D., MORELLO G., MORGAN E.H., NOWAK G., PAVLOV A., PERGER M., QUINTANA E.V., QUIRRENBACH A., REFFERT S., REINERS A., RICKER G., RIBAS I., LOPEZ C.R., ZAPATERO OSORIO M.R., SEAGER S., SCHOFER P., SCHWEITZER A., TRIFONOV T., VANAVERBEKE S., VANDERSPEK R., WEST R., WINN J. and ZECHMEISTER M.

Abstract (from CDS):

We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J ≃ 9.5 mag, ∼600-800 Myr) in an equal-mass ∼8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of R_b = 2.415 ± 0.090 R_⊕. This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of M_b = 6.28 ± 0.88 M_⊕ and, thus, an estimated bulk density of 2.45_–0.42^+0.48 g cm^–3. The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period (P_rot = 19-23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97_–16⁺²¹) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.

Abstract Copyright: © D. Kossakowski et al. 2021

Journal keyword(s): techniques: photometric - techniques: radial velocities - planetary systems - stars: individual: TOI-1201 - stars: individual: TIC 29960110 - stars: low-mass

VizieR on-line data: <Available at CDS (J/A+A/656/A124): tablee1.dat tablee2.dat>

Simbad objects: 32

Full paper

View the references in ADS

Number of rows : 32

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	V* GX And	Er*	00 18 22.8849799680	+44 01 22.637951588		10.120		7.3		M2V	517	0
2	BD+61 195	PM*	01 02 38.8680626986	+62 20 42.175257431		11.439		8.7		M1.5V	233	0
3	TOI-1201b	Pl?	02 48 59.2728445104	-14 32 14.943255139						~	3	0
4	PM J02489-1432W	PM*	02 48 59.2728446101	-14 32 14.942011299				12.677	10.72	M2.0	13	0
5	PM J02489-1432E	PM*	02 48 59.8297051819	-14 32 16.231249340		14.111	12.706	13.039	10.95	M2.5	9	0
6	BD-17 588	**	03 01 51.3895517	-16 35 36.110284						M3.5+M3.0	37	0
7	Cl Melotte 22	OpC	03 46 24	+24 06.8						~	3297	0
8	K2-25	Er*	04 13 05.6131374072	+15 14 52.018080576		15.81	15.56	13.72		M4.5V	59	0
9	K2-25b	Pl	04 13 05.6134710701	+15 14 52.013808246						~	61	0
10	K2-136	PM*	04 29 38.9939167752	+22 52 57.793533924		12.48	11.20	10.90		K5.5V	42	0
11	Cl Melotte 25	OpC	04 29 47	+16 56.9						~	2942	0
12	G 50-16	PM*	08 02 22.8829177661	+03 20 19.691170937		15.24		13.44		M4V	31	0
13	K2-95	*	08 37 27.0563032536	+18 58 36.021202824		19.86	17.27			M3V	50	0
14	K2-100b	Pl	08 38 24.3004849747	+20 06 21.828303951						~	48	0
15	K2-104	LM*	08 38 32.8359046503	+19 46 25.591543965		18.46	16.26			M1V	47	0
16	NGC 2632	OpC	08 40 13	+19 37.3						~	1458	0
17	K2-101	Ro*	08 41 22.5783027954	+18 56 01.947224876		13.970	12.957			K3V	52	0
18	V* CK Cnc	Er*	08 41 35.6913597205	+18 44 34.977650400						M2.7	34	0
19	K2-103	LM*	08 41 38.4893118114	+17 38 24.084971669						K7V	40	0
20	K2-264	*	08 45 26.0457995394	+19 41 54.446989270		18.33	16.41			M1.6	26	0
21	HD 79211	Er*	09 14 24.6828466599	+52 41 10.902471910		7.966		6.8		M0V	282	0
22	MCC 541	**	09 14 27.2	+52 41 18						~	25	0
23	G 162-44	PM*	10 18 35.1372361341	-11 43 00.243355403		14.68	13.14	12.84		M4.0	43	0
24	Ross 905b	Pl	11 42 11.0933874353	+26 42 23.658083337						~	743	1
25	HD 238090	PM*	12 12 20.8594045416	+54 29 08.722720968		11.28		9.315		K5V	99	0
26	NAME G 139-21b	Pl	17 15 18.9337265994	+04 57 50.064695682						~	663	1
27	HD 180617	PM*	19 16 55.2565688720	+05 10 08.040554168	11.768	10.63	9.115	8.076	6.782	M3-V	401	0
28	HD 197481b	Pl?	20 45 09.5323695486	-31 20 27.241710746						~	74	0
29	TRAPPIST-1b	Pl	23 06 29.3684052886	-05 02 29.031690445						~	198	0
30	NAME IC 2391 Supercluster	MGr	~	~						~	12	0
31	NAME Castor Moving Group	As*	~	~						~	125	1
32	NAME Pleiades Moving Group	MGr	~	~						~	272	1

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