2019A&A...628A..39L

Query : 2019A&A...628A..39L

2019A&A...628A..39L - Astronomy and Astrophysics, volume 628A, 39-39 (2019/8-1)

Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization.

LUQUE R., PALLE E., KOSSAKOWSKI D., DREIZLER S., KEMMER J., ESPINOZA N., BURT J., ANGLADA-ESCUDE G., BEJAR V.J.S., CABALLERO J.A., COLLINS K.A., COLLINS K.I., CORTES-CONTRERAS M., DIEZ-ALONSO E., FENG F., HATZES A., HELLIER C., HENNING T., JEFFERS S.V., KALTENEGGER L., KURSTER M., MADDEN J., MOLAVERDIKHANI K., MONTES D., NARITA N., NOWAK G., OFIR A., OSHAGH M., PARVIAINEN H., QUIRRENBACH A., REFFERT S., REINERS A., RODRIGUEZ-LOPEZ C., SCHLECKER M., STOCK S., TRIFONOV T., WINN J.N., ZAPATERO OSORIO M.R., ZECHMEISTER M., AMADO P.J., ANDERSON D.R., BATALHA N.E., BAUER F.F., BLUHM P., BURKE C.J., BUTLER R.P., CALDWELL D.A., CHEN G., CRANE J.D., DRAGOMIR D., DRESSING C.D., DYNES S., JENKINS J.M., KAMINSKI A., KLAHR H., KOTANI T., LAFARGA M., LATHAM D.W., LEWIN P., McDERMOTT S., MONTANES-RODRIGUEZ P., MORALES J.C., MURGAS F., NAGEL E., PEDRAZ S., RIBAS I., RICKER G.R., ROWDEN P., SEAGER S., SHECTMAN S.A., TAMURA M., TESKE J., TWICKEN J.D., VANDERSPECK R., WANG S.X. and WOHLER B.

Abstract (from CDS):

We report the detection of a transiting Earth-size planet around GJ 357, a nearby M2.5 V star, using data from the Transiting Exoplanet Survey Satellite (TESS). GJ 357 b (TOI-562.01) is a transiting, hot, Earth-sized planet (T_eq=525±11K) with a radius of R_b=1.217±0.084R_⊕ and an orbital period of P_b=3.93d. Precise stellar radial velocities from CARMENES and PFS, as well as archival data from HIRES, UVES, and HARPS also display a 3.93-day periodicity, confirming the planetary nature and leading to a planetary mass of M_b=1.84±0.31M_⊕. In addition to the radial velocity signal for GJ 357 b, more periodicities are present in the data indicating the presence of two further planets in the system: GJ 357 c, with a minimum mass of M_c=3.40±0.46M_⊕ in a 9.12d orbit, and GJ 357 d, with a minimum mass of M_d=6.1±1.0M_⊕ in a 55.7d orbit inside the habitable zone. The host is relatively inactive and exhibits a photometric rotation period of P_rot=78±2d. GJ 357 b isto date the second closest transiting planet to the Sun, making it a prime target for further investigations such as transmission spectroscopy. Therefore, GJ 357 b represents one of the best terrestrial planets suitable for atmospheric characterization with the upcoming JWST and ground-based ELTs.

Abstract Copyright: © ESO 2019

Journal keyword(s): planetary systems - techniques: photometric - techniques: radial velocities - stars: individual: Gl 357 - stars: late-type

VizieR on-line data: <Available at CDS (J/A+A/628/A39): table1.dat>

Simbad objects: 33

Full paper

View the references in ADS

Number of rows : 33

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						~	167	0
2	G 268-38	PM*	00 44 59.3309137511	-15 16 17.542839990			14.150	13.801		M4.5	134	0
3	NAME G 268-38c	Pl	00 44 59.3309137511	-15 16 17.542839990						~	60	0
4	Gaia DR3 5664813824769090944	*	09 36 01.2464522832	-21 39 41.167668060						~	1	0
5	Gaia DR3 5664814202726212224	*	09 36 01.5928008720	-21 39 36.170468568						~	1	0
6	GJ 357 e	Pl?	09 36 01.6372169407	-21 39 38.877606712						~	2	0
7	NAME L 678-39d	Pl	09 36 01.6372169407	-21 39 38.877606712						~	19	0
8	L 678-39	EB*	09 36 01.6372169407	-21 39 38.877606712	13.647	12.48	10.906	9.858	8.577	M2.5V	152	0
9	NAME L 678-39b	Pl	09 36 01.6372169407	-21 39 38.877606712						~	57	0
10	NAME L 678-39c	Pl	09 36 01.6372169407	-21 39 38.877606712						~	14	0
11	NAME L 320-124b	Pl	10 14 51.7786855411	-47 09 24.192778106						~	160	0
12	L 320-124	PM*	10 14 51.7786855411	-47 09 24.192778106				13.067		M4	120	0
13	K2-3	PM*	11 29 20.3917077216	-01 27 17.281697868		13.52	12.17	11.88		M1V	71	0
14	K2-3c	Pl	11 29 20.3917077216	-01 27 17.281697868						~	39	0
15	K2-3b	Pl	11 29 20.3917077216	-01 27 17.281697868						~	43	0
16	K2-18	PM*	11 30 14.5177445592	+07 35 18.255348492		15.01	13.50	13.24		dM2.5	91	0
17	K2-18b	Pl	11 30 14.5177445592	+07 35 18.255348492						~	142	0
18	HD 106315c	Pl	12 13 53.3962381416	-00 23 36.553445304						~	31	0
19	NAME G 139-21b	Pl	17 15 18.9339850845	+04 57 50.066612336						~	695	1
20	HD 156384C	PM*	17 18 58.8272997802	-34 59 48.612673382	12.96	11.79	10.22	10.05	8.82	M1.5V	214	1
21	BD+48 2893b	Pl	19 24 07.7659706688	+49 02 24.928348272						~	92	1
22	Kepler-406b	Pl	19 27 23.5375431360	+44 58 05.726111052						~	63	0
23	Kepler-87	Ro*	19 51 40.0490199888	+46 57 54.425250252						F9	63	2
24	HD 204961	PM*	21 33 33.9751191976	-49 00 32.399427028	11.359	10.176	8.672	7.665	6.479	M2/3V	277	1
25	TRAPPIST-1b	Pl	23 06 29.3684948589	-05 02 29.037301866						~	229	0
26	TRAPPIST-1f	Pl	23 06 29.3684948589	-05 02 29.037301866						~	210	0
27	TRAPPIST-1d	Pl	23 06 29.3684948589	-05 02 29.037301866						~	194	0
28	TRAPPIST-1e	Pl	23 06 29.3684948589	-05 02 29.037301866						~	257	0
29	TRAPPIST-1c	Pl	23 06 29.3684948589	-05 02 29.037301866						~	174	0
30	TRAPPIST-1g	Pl	23 06 29.3684948589	-05 02 29.037301866						~	177	0
31	TRAPPIST-1	LM*	23 06 29.3684948589	-05 02 29.037301866			18.798	16.466	14.024	M7.5e	926	0
32	HD 219134b	Pl	23 13 16.9749603608	+57 10 06.083823619						~	103	0
33	BD-02 5958d	Pl	23 27 04.8376907739	-01 17 10.582653030						~	44	0

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