2022A&A...664A..94P

Query : 2022A&A...664A..94P

2022A&A...664A..94P - Astronomy and Astrophysics, volume 664A, 94-94 (2022/8-1)

Three new brown dwarfs and a massive hot Jupiter revealed by TESS around early-type stars.

PSARIDI A., BOUCHY F., LENDL M., GRIEVES N., STASSUN K.G., CARMICHAEL T., GILL S., ROJAS P.A.P., GAN T., SHPORER A., BIERYLA A., BRAHM R., CHRISTIANSEN J.L., CROSSFIELD I.J.M., GALLAND F., HOOTON M.J., JENKINS J.M., JENKINS J.S., LATHAM D.W., LUND M.B., RODRIGUEZ J.E., TING E.B., UDRY S., ULMER-MOLL S., WITTENMYER R.A., ZHANG Y., ZHOU G., ADDISON B., COINTEPAS M., COLLINS K.A., COLLINS K.I., DELINE A., DRESSING C.D., EVANS P., GIACALONE S., HEITZMANN A., MIRELES I., MOUNZER D., OTEGI J., RADFORD D.J., RUDAT A., SCHLIEDER J.E., SCHWARZ R.P., SRDOC G., STOCKDALE C., SUAREZ O., WRIGHT D.J. and ZHAO Y.

Abstract (from CDS):

Context. The detection and characterization of exoplanets and brown dwarfs around massive AF-type stars is essential to investigate and constrain the impact of stellar mass on planet properties. However, such targets are still poorly explored in radial velocity (RV) surveys because they only feature a small number of stellar lines and those are usually broadened and blended by stellar rotation as well as stellar jitter. As a result, the available information about the formation and evolution of planets and brown dwarfs around hot stars is limited.
Aims. We aim to increase the sample and precisely measure the masses and eccentricities of giant planets and brown dwarfs transiting early-type stars detected by the Transiting Exoplanet Survey Satellite (TESS).
Methods. We followed bright (V < 12 mag) stars with T_eff > 6200 K that host giant companions (R>7R_⊕) using ground-based photometric observations as well as high precision radial velocity measurements from the CORALIE, CHIRON, TRES, FEROS, and MINERVA-Australis spectrographs.
Results. In the context of the search for exoplanets and brown dwarfs around early-type stars, we present the discovery of three brown dwarf companions, TOI-629b, TOI-1982b, and TOI-2543b, and one massive planet, TOI-1107b. From the joint analysis of TESS and ground-based photometry in combination with high precision radial velocity measurements, we find the brown dwarfs have masses between 66 and 68 M_Jup, periods between 7.54 and 17.17 days, and radii between 0.95 and 1.11 R_Jup. The hot Jupiter TOI-1107b has an orbital period of 4.08 days, a radius of 1.30 R_Jup, and a mass of 3.35 M_Jup. As a by-product of this program, we identified four low-mass eclipsing components (TOI-288b, TOI-446b, TOI-478b, and TOI-764b).
Conclusions. Both TOI-1107b and TOI-1982b present an anomalously inflated radius with respect to the age of these systems. TOI-629 is among the hottest stars with a known transiting brown dwarf. TOI-629b and TOI-1982b are among the most eccentric brown dwarfs. The massive planet and the three brown dwarfs add to the growing population of well-characterized giant planets and brown dwarfs transiting AF-type stars and they reduce the apparent paucity.

Abstract Copyright: © A. Psaridi et al. 2022

Journal keyword(s): brown dwarfs - planetary systems - techniques: photometric - techniques: radial velocities - stars: early-type - binaries: eclipsing

VizieR on-line data: <Available at CDS (J/A+A/664/A94): stars.dat lcs1.dat lcs2.dat rvs1.dat rvs2.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 60

Full paper

View the references in ADS

Number of rows : 60

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	KELT-1b	Pl	00 01 26.9169325133	+39 23 01.782142922						~	101	0
2	HD 2685b	Pl	00 29 18.9527148000	-76 18 14.623257174						~	12	0
3	TOI-852b	BD?	01 38 57.6639620046	-07 16 51.256349916						~	5	0
4	HD 15082b	Pl	02 26 51.0582746497	+37 33 01.737746137						~	295	1
5	TOI-263.01	Pl?	02 28 25.9517900506	-25 05 50.539974594						~	10	0
6	GPX-1b	Pl?	02 33 28.6057674360	+56 01 32.548681642						~	5	0
7	TYC 7053-1822-1	*	05 00 41.1873845184	-35 12 09.398752920		12.830	12.319			~	6	0
8	TOI-446b	Pl?	05 00 41.1873845184	-35 12 09.398752920						~	1	0
9	HD 274870B	BD?	05 28 30.7098553322	-48 24 32.302778259						~	6	0
10	* bet Pic	PM*	05 47 17.0876901	-51 03 59.441135	4.13	4.03	3.86	3.74	3.58	A6V	1813	1
11	TOI-811b	BD?	05 52 07.2569953541	-32 55 30.663337365						~	9	0
12	HD 44717	*	06 23 18.6911952888	+00 53 00.105902772		8.84	8.74			A0V	7	0
13	TOI-629.01	Pl?	06 23 18.6912365440	+00 53 00.107912261						~	3	0
14	CoRoT-15b	BD?	06 28 27.8204	+06 11 10.477		17.012	15.997	15.807		~	44	1
15	[KC2019] Theia 838	As*	06 29 10.26	+04 23 14.8						~	2	0
16	TOI-746.01	Pl?	06 38 28.9994837538	-67 38 56.319562707						~	2	0
17	TYC 6516-842-1	*	06 40 38.1123822720	-27 34 17.063072508		12.20	11.66			~	4	0
18	TOI-478b	Pl?	06 40 38.1123822720	-27 34 17.063072508						~	1	0
19	HATS-70b	Pl	07 16 25.0880178844	-31 14 39.858560668						~	22	0
20	CD-41 3255B	BD?	07 40 24.6582390859	-42 09 16.740639385						~	5	0
21	BD+13 1880B	BD?	08 17 16.8973986331	+12 36 04.912283928						~	10	0
22	TOI-587b	Pl?	08 41 35.0486575537	-22 11 39.574721391						~	2	0
23	EPIC 211946007.01	Pl?	08 42 39.4400086116	+19 24 51.898666284						~	8	0
24	EPIC 212036875.01	Pl	08 58 45.6699859877	+20 52 08.784463659						~	9	0
25	TOI-2543b	Pl?	09 06 23.2683706176	+03 34 03.702389844						~	1	0
26	TYC 229-654-1	*	09 06 23.2683706176	+03 34 03.702389844		11.72	11.18			~	1	0
27	HD 85628b	Pl	09 50 19.2005724437	-66 06 49.892567590						~	14	0
28	LP 261-75 B	BD*	09 51 05.49288	+35 58 02.1288						L6V	56	0
29	CD-81 373	*	10 22 25.8181710480	-82 13 07.977573120		11.04	10.55			~	1	0
30	TOI-1107b	Pl?	10 22 25.8181710480	-82 13 07.977573120						~	1	0
31	TOI-3362b	Pl?	10 23 56.2398435409	-56 50 35.340538178						~	4	0
32	WASP-128b	BD?	11 31 26.0933641458	-41 41 22.299023767						~	19	0
33	TYC 7740-537-1	*	11 37 12.6890144256	-38 18 25.924598820		11.80	11.03			~	1	0
34	TOI-764b	Pl?	11 37 12.6890144256	-38 18 25.924598820						~	1	0
35	EPIC 201702477.01	Pl?	11 40 57.7884018605	+03 40 53.646730450						~	13	0
36	CD-34 8618b	Pl	13 04 10.5340634070	-35 32 58.321129314						~	18	0
37	TOI-1982b	Pl?	13 50 20.3911201248	-23 23 00.062667564						~	1	0
38	BD-22 3669	*	13 50 20.3911201248	-23 23 00.062667564		11.06	10.55			~	2	0
39	NGTS-19B	BD?	15 16 31.5959069782	-25 42 17.824831139						~	3	1
40	LP 563-38	EB*	15 46 04.3030642435	+04 41 30.066220912		17.1		15.0		M5.1	34	1
41	UGCS J160339.22-185129.4	EB*	16 03 39.2319975144	-18 51 29.400368220						M2.5e	24	0
42	TOI-2109b	Pl?	16 52 44.7202666920	+16 34 47.839982988						~	6	0
43	CoRoT-33b	Pl?	18 38 33.9101911792	+05 37 28.787049157						~	20	0
44	Kepler-486b	Pl	18 59 31.1991510825	+49 16 01.170776185						~	31	0
45	G 205-57C	BD?	19 10 14.284032	+46 57 24.10632						~	36	0
46	EPIC 219388192.01	Pl?	19 17 34.0313669245	-16 52 17.793013971						~	19	0
47	CoRoT-3b	Pl	19 28 13.2642482783	+00 07 18.614302248						~	131	1
48	KOI-415b	Pl?	19 33 13.4495838492	+41 36 22.965658614						~	37	0
49	Kepler-492b	Pl	19 41 59.1967192074	+42 32 16.400829033						~	37	0
50	Kepler-39b	Pl	19 47 50.4745660177	+46 02 03.499173435						~	60	1
51	HD 195689b	Pl	20 31 26.3534038246	+39 56 19.765154336						~	218	0
52	HD 195689	SB*	20 31 26.3534153736	+39 56 19.773037500		7.59	7.56			A0	98	0
53	HD 201033b	Pl?	21 04 48.8646767743	+55 35 16.509423144						~	11	0
54	HD 201585b	Pl	21 10 12.3723474386	+10 44 19.944718883						~	34	0
55	TOI-1278b	BD?	21 21 54.9403734715	+35 38 55.777318896						~	7	0
56	TOI-148.01	Pl?	22 33 16.961736	-38 09 34.98732						~	2	0
57	TOI-288b	Pl?	22 41 13.8555082752	-28 01 57.594935784						~	1	0
58	HD 214829	*	22 41 13.8555082752	-28 01 57.594935784		9.85	9.36			F3V	4	0
59	NGTS-7Ab	BD?	23 30 05.2358629579	-38 58 11.462828113						~	16	0
60	WASP-30b	BD?	23 53 38.054	-10 07 05.12						~	41	1

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