2020A&A...642A.236K

Query : 2020A&A...642A.236K

2020A&A...642A.236K - Astronomy and Astrophysics, volume 642A, 236-236 (2020/10-1)

Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488).

KEMMER J., STOCK S., KOSSAKOWSKI D., KAMINSKI A., MOLAVERDIKHANI K., SCHLECKER M., CABALLERO J.A., AMADO P.J., ASTUDILLO-DEFRU N., BONFILS X., CIARDI D., COLLINS K.A., ESPINOZA N., FUKUI A., HIRANO T., JENKINS J.M., LATHAM D.W., MATTHEWS E.C., NARITA N., PALLE E., PARVIAINEN H., QUIRRENBACH A., REINERS A., RIBAS I., RICKER G., SCHLIEDER J.E., SEAGER S., VANDERSPEK R., WINN J.N., ALMENARA J.M., BEJAR V.J.S., BLUHM P., BOUCHY F., BOYD P., CHRISTIANSEN J.L., CIFUENTES C., CLOUTIER R., COLLINS K.I., CORTES-CONTRERAS M., CROSSFIELD I.J.M., CROUZET N., DE LEON J.P., DELLA-ROSE D.D., DELFOSSE X., DREIZLER S., ESPARZA-BORGES E., ESSACK Z., FORVEILLE T., FIGUEIRA P., GALADI-ENRIQUEZ D., GAN T., GLIDDEN A., GONZALES E.J., GUERRA P., HARAKAWA H., HATZES A.P., HENNING T., HERRERO E., HODAPP K., HORI Y., HOWELL S.B., IKOMA M., ISOGAI K., JEFFERS S.V., KURSTER M., KAWAUCHI K., KIMURA T., KLAGYIVIK P., KOTANI T., KUROKAWA T., KUSAKABE N., KUZUHARA M., LAFARGA M., LIVINGSTON J.H., LUQUE R., MATSON R., MORALES J.C., MORI M., MUIRHEAD P.S., MURGAS F., NISHIKAWA J., NISHIUMI T., OMIYA M., REFFERT S., RODRIGUEZ LOPEZ C., SANTOS N.C., SCHOFER P., SCHWARZ R.P., SHIAO B., TAMURA M., TERADA Y., TWICKEN J.D., UEDA A., VIEVARD S., WATANABE N. and ZECHMEISTER M.

Abstract (from CDS):

We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P=1.1980035±0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, Mb=1.86±0.30M⊕, and radius, Rb=1.264±0.050R⊕. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, Mcsini=7.41±0.91M⊕, and orbital period, Pc=15.509±0.033d. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.

Abstract Copyright: © ESO 2020

Journal keyword(s): planetary systems - planets and satellites: detection - techniques: radial velocities - techniques: photometric - stars: late-type - stars: individual: G 50-16

VizieR on-line data: <Available at CDS (J/A+A/642/A236): table1.dat>

Simbad objects: 30

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Number of rows : 30
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME G 268-38b Pl 00 44 59.3309137511 -15 16 17.542839990           ~ 180 0
2 NAME G 268-38c Pl 00 44 59.3309137511 -15 16 17.542839990           ~ 63 0
3 LP 544-12 PM* 08 02 20.6440646840 +03 19 43.541321263   18.6   16.8   M6V 18 0
4 NAME G 50-16c Pl 08 02 22.8829177661 +03 20 19.691170937           ~ 6 0
5 NAME G 50-16b Pl 08 02 22.8829177661 +03 20 19.691170937           ~ 18 0
6 G 50-16 PM* 08 02 22.8829177661 +03 20 19.691170937   15.24   13.44   M4V 41 0
7 NAME L 98-59 c Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 49 0
8 NAME L 98-59 d Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 50 0
9 NAME L 678-39b Pl 09 36 01.6372169407 -21 39 38.877606712           ~ 60 0
10 LSPM J1008+6916b Pl 10 08 51.8069885952 +69 16 35.560317504           ~ 33 0
11 LSPM J1008+6916 PM* 10 08 51.8069885952 +69 16 35.560317504       11.065   M0.5V 31 0
12 NAME L 320-124b Pl 10 14 51.7786855411 -47 09 24.192778106           ~ 169 0
13 L 320-124 PM* 10 14 51.7786855411 -47 09 24.192778106       13.067   M4 125 0
14 G 162-44 PM* 10 18 35.1372361341 -11 43 00.243355403   14.68 13.14 12.84   M4.0 56 0
15 BD-07 4003c Pl 15 19 26.8269387505 -07 43 20.189497466           ~ 115 1
16 G 226-66 PM* 17 35 34.4785242391 +61 40 53.628113703   11.40 9.98 9.52 8.01 M1V 140 0
17 BD+18 3421b Pl 17 37 53.3468417549 +18 35 30.164096453           ~ 15 0
18 Kepler-138c Pl 19 21 31.5679755816 +43 17 34.680970608           ~ 64 0
19 Kepler-138d Pl 19 21 31.5679755816 +43 17 34.680970608           ~ 65 0
20 L 210-70 PM* 20 27 42.0813992356 -56 27 25.151894071       11.83   M2.5V 42 0
21 NAME L 210-70b Pl 20 27 42.0813992356 -56 27 25.151894071           ~ 34 0
22 HD 217987c Pl? 23 05 52.0357857091 -35 51 11.055185039           ~ 7 0
23 TRAPPIST-1g Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 195 0
24 TRAPPIST-1e Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 287 0
25 TRAPPIST-1f Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 232 0
26 TRAPPIST-1b Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 255 0
27 TRAPPIST-1c Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 192 0
28 TRAPPIST-1h Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 127 0
29 TRAPPIST-1d Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 214 0
30 CD-60 8051 PM* 23 20 07.5245143451 -60 03 54.644648069   12.45 11.02 10.584   M2V 45 0

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