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

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

2021A&A...656A.124K - Astronomy and Astrophysics, volume 656A124-124 (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., CARDONA GUILLEN 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 Rb = 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 Mb = 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 (Prot = 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

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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 - 2026 		#notes
1 HD 1326 PM* 00 18 22.8849799680 +44 01 22.637951588   9.61 8.14 7.3   M2V 602 0
2 BD+61 195 PM* 01 02 38.8680626986 +62 20 42.175257431   11.439   8.7   M1.5V 285 0
3 PM J02489-1432W PM* 02 48 59.2728446101 -14 32 14.942011299       12.677 10.72 M2.0 40 0
4 NAME PM J02489-1432Wb Pl 02 48 59.2728446101 -14 32 14.942011299           ~ 22 0
5 PM J02489-1432E PM* 02 48 59.8297051819 -14 32 16.231249340   14.111 12.706 13.039 10.95 M2.5 20 0
6 BD-17 588 ** 03 01 51.3895517 -16 35 36.110284           M3.5+M3.0 73 0
7 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
8 K2-25 PM* 04 13 05.6131374072 +15 14 52.018080576   15.81 15.56 13.72   M4.5V 108 0
9 K2-25b Pl 04 13 05.6131374072 +15 14 52.018080576           ~ 108 0
10 K2-136 PM* 04 29 38.9939167752 +22 52 57.793533924   12.48 11.20 10.90   K5.5V 92 0
11 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
12 G 50-16 PM* 08 02 22.8829177661 +03 20 19.691170937   15.24   13.44   M4V 63 0
13 K2-95 * 08 37 27.0563032536 +18 58 36.021202824   19.86 17.27     M3V 77 0
14 K2-100b Pl 08 38 24.3002838928 +20 06 21.828057218           ~ 83 0
15 K2-104 LM* 08 38 32.8359046503 +19 46 25.591543965   18.46 16.26     M1V 72 0
16 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
17 K2-101 Ro* 08 41 22.5783027954 +18 56 01.947224876   13.970 12.957     K3V 89 0
18 V* CK Cnc Er* 08 41 35.6913597205 +18 44 34.977650400           M2.7 50 0
19 K2-103 LM* 08 41 38.4893118114 +17 38 24.084971669           K7V 64 0
20 K2-264 * 08 45 26.0457995394 +19 41 54.446989270   18.33 16.41     M1.6 50 0
21 HD 79211 PM* 09 14 24.6828466599 +52 41 10.902471910   7.966   6.8   M0V 341 0
22 MCC 541 ** 09 14 27.2 +52 41 18           ~ 32 0
23 G 162-44 PM* 10 18 35.1372361341 -11 43 00.243355403   14.68 13.14 12.84   M4.0 98 0
24 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 913 1
25 HD 238090 PM* 12 12 20.8594045416 +54 29 08.722720968   11.28   9.315   K5V 125 0
26 NAME G 139-21b Pl 17 15 18.9339850845 +04 57 50.066612336           ~ 845 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 475 0
28 HD 197481b Pl 20 45 09.5324974119 -31 20 27.237889841           ~ 158 0
29 TRAPPIST-1b Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 380 0
30 NAME Pleiades Moving Group MGr ~ ~           ~ 297 0
31 NAME IC 2391 Supercluster MGr ~ ~           ~ 20 0
32 NAME Castor Moving Group As* ~ ~           ~ 140 1

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