2021AJ....162..144A

Query : 2021AJ....162..144A

2021AJ....162..144A - Astron. J., 162, 144-144 (2021/October-0)

TOI-1278 b: SPIRou unveils a rare brown dwarf companion in close-in orbit around an M dwarf.

ARTIGAU E., HEBRARD G., CADIEUX C., VANDAL T., COOK N.J., DOYON R., GAGNE J., MOUTOU C., MARTIOLI E., FRASCA A., JAHANDAR F., LAFRENIERE D., MALO L., DONATI J.-F., CORTES-ZULETA P., BOISSE I., DELFOSSE X., CARMONA A., FOUQUE P., MORIN J., ROWE J., MARINO G., PAPINI R., CIARDI D.R., LUND M.B., MARTINS J.H.C., PELLETIER S., ARNOLD L., BOUCHY F., FORVEILLE T., SANTOS N.C., BONFILS X., FIGUEIRA P., FAUSNAUGH M., RICKER G., LATHAM D.W., SEAGER S., WINN J.N., JENKINS J.M., TING E.B., TORRES G. and GOMES DA SILVA J.

Abstract (from CDS):

We present the discovery of an 18.5 ± 0.5 MJup brown dwarf (BD) companion to the M0V star TOI-1278. The system was first identified through a percent-deep transit in Transiting Exoplanet Survey Satellite photometry; further analysis showed it to be a grazing transit of a Jupiter-sized object. Radial velocity (RV) follow-up with the SPIRou near-infrared high-resolution velocimeter and spectropolarimeter in the framework of the 300-night SPIRou Legacy Survey carried out at the Canada-France-Hawaii Telescope led to the detection of a Keplerian RV signal with a semi-amplitude of 2306 ± 10 m s–1 in phase with the 14.5 day transit period, with a slight but nonzero eccentricity. The intermediate-mass ratio (M*/Mcomp ∼ 31) is unique for having such a short separation (0.095 ± 0.001 au) among known M-dwarf systems. Interestingly, M-dwarf-BD systems with similar mass ratios exist with separations of tens to thousands of astronomical unit.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Brown dwarfs - Radial velocity - Transit photometry - Transits - M dwarf stars

Simbad objects: 43

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Number of rows : 43
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 SCR J0103-5515C LM* 01 03 35.58 -55 15 54.6           ~ 43 0
2 V* GU Psc B BD* 01 12 36.53808 +17 04 29.9424           T3.5 68 0
3 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 533 2
4 TOI-263b Pl 02 28 25.9518748896 -25 05 50.545991256           ~ 13 0
5 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3435 0
6 V* DH Tau B LM* 04 29 41.66 +26 32 56.5           M9.25 82 1
7 NAME 32 Ori group OpC 05 27 11 +06 16.0           ~ 69 0
8 NGTS-1b Pl 05 30 51.4522649760 -36 37 50.895680268           ~ 50 0
9 TOI-811b BD? 05 52 07.2569953541 -32 55 30.663337365           ~ 12 0
10 HD 41004Bb Pl 05 59 49.6531151 -48 14 23.428302           ~ 29 1
11 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 280 0
12 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 885 0
13 TOI-519b Pl 08 18 25.6680189408 -19 39 46.501007184           ~ 14 0
14 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1564 0
15 Cl* NGC 2632 HSHJ 430 EB* 08 42 39.4398272616 +19 24 51.898641012           M3.9 41 0
16 LP 261-75 LM* 09 51 04.5755715720 +35 58 09.461810208   16.1   14.2   M4.5Ve 50 0
17 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 60 0
18 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1892 1
19 CHXR 73B LM* 11 06 28.49 -77 37 34.2           M9.5+ 32 0
20 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 477 1
21 Cl Melotte 111 OpC 12 24 03.4 +25 39 07           ~ 480 0
22 NAME Proxima Centauri Er* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1299 0
23 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 774 0
24 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 474 1
25 LP 563-38 EB* 15 46 04.3030642435 +04 41 30.066220912   17.1   15.0   M5.1 38 1
26 UGCS J160339.22-185129.4 EB* 16 03 39.2319975144 -18 51 29.400368220           M2.5e 27 0
27 NAME Upper Sco Association As* 16 12 -23.4           ~ 1369 1
28 G 205-57C BD? 19 10 14.284032 +46 57 24.10632           ~ 38 0
29 G 205-57 EB* 19 10 14.284032 +46 57 24.10632   14.93 13.38 13.01   M1 60 0
30 G 205-57A PM* 19 10 14.3140055555 +46 57 25.696847596           M2.5 11 0
31 TOI-1899b Pl 19 57 42.3954352512 +40 08 35.754385020           ~ 15 0
32 V* V836 Cyg EB* 21 21 23.5920589224 +35 44 10.610259324   8.82 8.76     A0V 83 0
33 TOI-1278b BD? 21 21 54.9403734715 +35 38 55.777318896           ~ 11 0
34 TOI-1278 PM* 21 21 54.9403734715 +35 38 55.777318896   14.854 13.435 12.952   M0V 5 0
35 2MASS J21265040-8140293 BD* 21 26 50.3636724576 -81 40 29.223318396         18.38 L3gamma 16 0
36 HD 209290 PM* 22 02 10.2750978279 +01 24 00.832158070 11.838 10.616 9.146 8.213 7.245 M0.5V 247 0
37 BD-15 6290b Pl 22 53 16.7325836486 -14 15 49.304052185           ~ 253 1
38 BD-15 6290c Pl 22 53 16.7325836486 -14 15 49.304052185           ~ 195 1
39 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 995 0
40 NGTS-7Ab BD? 23 30 05.2358629579 -38 58 11.462828113           ~ 18 0
41 NGTS-7 ** 23 30 05.26248 -38 58 11.7012   17.091 15.502     ~ 3 0
42 NGC 7790 OpC 23 58 27.1 +61 12 36   9.18 8.5     ~ 272 0
43 NAME Carina Association As* ~ ~           ~ 154 1

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