2024ApJ...967..147M

Query : 2024ApJ...967..147M

2024ApJ...967..147M - Astrophys. J., 967, 147 (2024/June-1)

Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE.

MAROCCO F., KIRKPATRICK J.D., SCHNEIDER A.C., MEISNER A.M., POPINCHALK M., GELINO C.R., FAHERTY J.K., BURGASSER A.J., CASELDEN D., GAGNE J., AGANZE C., BARDALEZ GAGLIUFFI D.C., CASEWELL S.L., HSU C.-C., KIMAN R., EISENHARDT P.R.M., KUCHNER M.J., STERN D., GRAMAIZE L., SAINIO A., BICKLE T.P., ROTHERMICH A., PENDRILL W., THEVENOT M., KABATNIK M., COLOMBO G., HIGASHIMURA H., KIWY F., MARCHESE E.J., ANDERSEN N.S., TANNER C., WALLA J., WEDRACKI Z. (The Backyard Worlds Collaboration)

Abstract (from CDS):

We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using Wide-field Infrared Survey Explorer/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 projects (hereafter BYW). This sample represents an ∼60% increase in the number of known M + T systems, and allows us to probe the most extreme products of binary/planetary system formation, a discovery space made available by the CatWISE2020 catalog and the BYW effort. Highlights among the sample are WISEP J075108.79-763449.6, a previously known T9 thought to be old due to its spectral energy distribution, which was found by Zhang et al. (2021b) to be part of a common proper motion pair with L34-26 A, a well-studied young M3 V star within 10 pc of the Sun; CWISE J054129.32-745021.5 B and 2MASS J05581644-4501559 B, two T8 dwarfs possibly associated with the very fast-rotating M4 V stars CWISE J054129.32745021.5 A and 2MASS J05581644-4501559 A; and UCAC3 52-1038 B, which is among the widest late-T companions to main-sequence stars, with a projected separation of ∼7100 au. The new benchmarks presented here are prime JWST targets, and can help us place strong constraints on the formation and evolution theory of substellar objects as well as on atmospheric models for these cold exoplanet analogs.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Visual binary stars - Low mass stars - Brown dwarfs - T dwarfs - Fundamental parameters of stars

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

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 - 2026 		#notes
1 NAME Tuc Moving Group MGr 00 00 -64.0           ~ 73 0
2 L 26-16 B BD* 00 03 06.43 -75 33 09.8           T4 1 0
3 L 26-16 PM* 00 03 18.4644698232 -75 33 21.031378681   13.45 11.670 11.315   ~ 15 0
4 WISE J001031.47+171601.2 BD* 00 10 31.41 +17 16 01.3           T5.5 1 0
5 2MASS J00103250+1715490 LM* 00 10 32.4624995112 +17 15 48.939679440           M8e 6 0
6 L 122-88 LM* 00 31 23.7691302720 -64 13 59.200107569   14.69 13.12 12.735 10.95 M2V 13 0
7 L 122-88 B BD? 00 31 47.75 -64 11 23.5           ~ 1 0
8 Ross 19 PM* 02 19 03.0091826196 +35 21 18.600536810   13.8   12.250   M3.5V 45 0
9 CWISE J031213.61-084558.8 BD* 03 12 13.61 -08 45 58.8           T6 1 0
10 LP 712-16 LM* 03 12 14.5229221660 -08 45 45.846204289   16.654 14.984 14.610   M4V 8 0
11 L 55-11 LM* 03 28 08.3507498904 -70 01 40.677730338   14.641 13.055 12.680 10.64 M3V 12 0
12 L 55-11 B BD? 03 28 09.72 -70 00 26.8           ~ 1 0
13 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
14 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
15 WISEA J054107.93-745031.1 BD? 05 41 07.90 -74 50 29.6           ~ 1 0
16 UCAC4 076-005204 LM* 05 41 29.2557004468 -74 50 23.371791985       15.777   M4V 2 0
17 RX J0558.3-4501 LM* 05 58 16.4361474803 -45 01 55.978150554   16.533 14.928 14.678   M4V 5 0
18 RX J0558.3-4501B BD* 05 58 16.799939 -45 02 34.40491           T8 3 0
19 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 337 0
20 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 549 0
21 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
22 LP 364-180 PM* 07 16 27.7009993847 +23 42 10.470584335   16.4   14.4   sdM2 22 0
23 L 34-26 LM* 07 49 12.6783092712 -76 42 06.715308276   12.98 11.276 10.19 8.746 M3Ve 63 0
24 L 34-26 B BD* 07 51 08.74800 -76 34 50.2968           T9 43 0
25 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
26 SCR J0959-3007B BD? 09 58 58.01 -30 07 18.1           ~ 1 0
27 SCR J0959-3007 LM* 09 59 00.5739923380 -30 07 44.179549543   17.53   15.48 13.06 M5V 6 0
28 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
29 WT 1963 LM* 13 00 02.0147661191 -28 43 29.520145727       13.361   M4V 8 0
30 WT 1963B BD* 13 00 02.24 -28 43 55.3           T6 1 0
31 LP 270-10 B BD* 13 53 45.23 +38 03 32.1           T6.5 1 0
32 LP 270-10 LM* 13 53 46.5387187368 +38 04 23.098354392   15.374 13.790 13.371   M2V 9 0
33 LP 381-30 B BD* 14 16 08.91 +23 22 42.0           T7 1 0
34 LP 381-30 LM* 14 16 11.3744586384 +23 23 29.213113992   13.445 11.862 11.437   M1.0V 26 0
35 G 135-35 PM* 14 17 40.1096548219 +20 56 38.764209918   14.58   12.990   dM3.0 20 0
36 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
37 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
38 Wolf 1130 B BD* 20 05 21.77853 +54 24 43.2739           T8p 45 0
39 CFBDS J214947-040308 BD* 21 49 47.20 -04 03 08.9           T7 30 0
40 HD 221361 * 23 33 00.2627258184 -78 56 07.730349540   9.51 9.28     A3V 13 0
41 NAME Octans-near MGr ~ ~           ~ 29 0
42 NAME Carina Moving Group MGr ~ ~           ~ 66 0
43 NAME Coma Berenices Moving Group MGr ~ ~           ~ 103 0

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