2024A&A...685A...6R

Query : 2024A&A...685A...6R

2024A&A...685A...6R - Astronomy and Astrophysics, volume 685A6 (2024/5-1)

Near-infrared spectroscopic characterisation of Gaia ultra-cool dwarf candidates Spectral types and peculiarities.

RAVINET T., REYLE C., LAGARDE N., BURGASSER A., SMART R.L., MOYA W.H., MAROCCO F., SCHOLZ R.-D., COOPER W.J., CRUZ K.L., FERNANDEZ-TRINCADO J.G., HOMEIER D. and SARRO L.M.

Abstract (from CDS):

Context. The local census of very low-mass stars and brown dwarfs is crucial to improving our understanding of the stellar-substellar transition and their formation history. These objects, known as ultra-cool dwarfs (UCDs), are essential targets for searches of potentially habitable planets. However, their detection poses a challenge because of their low luminosity. The Gaia survey has identified numerous new UCD candidates thanks to its large survey and precise astrometry.
Aims. We aim to characterise 60 UCD candidates detected by Gaia in the solar neighbourhood with a spectroscopic follow-up to confirm that they are UCDs, as well as to identify peculiarities.
Methods. We acquired the near-infrared (NIR) spectra of 60 objects using the SOFI spectrograph between 0.93 and 2.5 µm (R∼ 600). We identified their spectral types using a template-matching method. Their binarity is studied using astrometry and spectral features.
Results. We confirm that 60 objects in the sample have ultra-cool dwarf spectral types close to those expected from astrometry. Their NIR spectra reveal that seven objects could host an unresolved coolest companion and seven UCDs share the same proper motions as other stars. The characterisation of these UCDs is part of a coordinated effort to improve our understanding of the Solar neighbourhood.

Abstract Copyright: © The Authors 2024

Journal keyword(s): surveys - brown dwarfs - stars: late-type - stars: low-mass - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/685/A6): tabled.dat fits/*>

Simbad objects: 70

goto Full paper

goto View the references in ADS

Number of rows : 70
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 LSPM J0006+0439 LM* 00 06 26.2280899994 +04 39 11.673320377   21.5   19.0   M8 8 0
2 2MASS J00102936-0746487 LM* 00 10 29.3686874760 -07 46 48.958227624           M7.5 7 0
3 SIPS J0052-6201 LM* 00 52 15.3275987791 -62 01 54.380042880   19.7   16.7 13.3 sdM7.0 12 0
4 RG 0050-2722 LM* 00 52 54.6987655128 -27 05 59.561032272     21.51     M7.5:V 46 0
5 2MASS J01063737+1518556 LM* 01 06 37.3251796803 +15 18 54.943644450           M8pec 13 0
6 LP 647-13 LM* 01 09 51.2021035859 -03 43 26.390003589   20.9 19.266 17.168 14.708 M9Ve 51 0
7 2MASS J01550354+0950003 BD* 01 55 03.5501844443 +09 50 00.395365641           L4 26 0
8 2MASS J03043226-2435136 LM* 03 04 32.2581588504 -24 35 13.642023912           M8.5 3 0
9 2MASS J03093359-1354243 LM* 03 09 33.5957734889 -13 54 23.727811172           M8.5pec(blue) 9 0
10 2MASS J03252912+1412333 LM* 03 25 29.1099148008 +14 12 33.125762628           M8.5pec(blue) 4 0
11 Gaia DR3 3271777035212786944 PM* 03 47 07.5688237041 +04 17 54.892954280           ~ 2 0
12 Gaia DR3 3271777035211085312 LM* 03 47 07.5792679294 +04 17 54.210825783           M8.5 2 0
13 2MASS J04124640-0734097 BD* 04 12 46.4276135681 -07 34 10.158631974           L2pec 6 0
14 2MASS J04373186-2517458 LM* 04 37 31.8633017136 -25 17 45.816401724           L1.5 3 0
15 LSPM J0451+0305 LM* 04 51 14.0631933600 +03 05 28.483367820   20.6   18.6   M8V 9 0
16 2MASS J05175844-2816084 LM* 05 17 58.4743434720 -28 16 08.629687956           L1pec(blue) 5 0
17 GALEX J052933.2-635653 WD* 05 29 33.3489640560 -63 56 55.290865272           DA 9 0
18 2MASS J05294026-6357091 LM* 05 29 40.3090325136 -63 57 09.265951944           M7.5 5 0
19 2MASS J05312762+0215496 LM* 05 31 27.6249438360 +02 15 49.649624928           M8.5 4 0
20 2MASS J05333241+0323174 LM* 05 33 32.4083266200 +03 23 17.474529552           L1.0 5 0
21 2MASS J05523129-0002124 LM* 05 52 31.3057387116 -00 02 12.450775420           M9.0pec 4 0
22 2MASS J05551490-5402520 LM* 05 55 14.9079309685 -54 02 52.060611194           sdM7.0 7 0
23 2MASS J05560844+0802376 LM* 05 56 08.4419889000 +08 02 37.621519512           M8.0 6 0
24 2MASS J06112737-5109134 LM* 06 11 27.3700632792 -51 09 13.461175510           M9.5 7 0
25 2MASS J07030328+0711008 LM* 07 03 03.2855955291 +07 11 00.864202436           M8V 8 0
26 2MASS J07155182-1145284 BD* 07 15 51.8738989413 -11 45 28.800901874           L5.0 15 1
27 L 527-12 LM* 07 21 54.3481880952 -31 04 36.780903588     12.54     M3.0 9 0
28 2MASS J07215519-3105148 LM* 07 21 55.2005106456 -31 05 15.113239944           M6.5 7 0
29 2MASS J07370103-4051591 LM* 07 37 01.0328747784 -40 51 59.223646764           L1.5 3 0
30 2MASS J08004870-2325584 LM* 08 00 48.6980961144 -23 25 58.465663860           L0.0 2 0
31 2MASS J08131950-5232031 LM* 08 13 19.4876360529 -52 32 02.981542401           L3.0pec 7 0
32 2MASS J08270052-5216277 LM* 08 27 00.5319568800 -52 16 27.584244372           L1pec(blue) 4 0
33 2MASS J08334323-5336417 LM* 08 33 43.1945282918 -53 36 41.238966395           M7V 10 0
34 2MASS J08335956-5217250 LM* 08 33 59.5345839569 -52 17 24.645602188           M7.0 8 0
35 2MASS J08531172-1738556 LM* 08 53 11.7189827472 -17 38 55.653255600           L0.0 2 0
36 2MASS J09064219-3548217 LM* 09 06 42.1901287896 -35 48 21.634711740           M7.0 8 0
37 SIPS J0923-2727 LM* 09 23 30.2978206656 -27 27 20.794250340           M8.5 7 0
38 2MASS J09241354-6655302 LM* 09 24 13.5455592840 -66 55 30.240189120           M7.5 5 0
39 2MASS J09365490-3346212 LM* 09 36 54.8856314330 -33 46 21.251697246           M8.5 5 0
40 RX J0936.9-2610C LM* 09 36 55.6513558104 -26 09 42.307080732           M8V 7 0
41 2MASS J09432812-2010064 LM* 09 43 28.1282063280 -20 10 06.539583864           M8.5 4 0
42 2MASS J09432825-2009561 LM* 09 43 28.2570226488 -20 09 56.218811508           M7.5 3 0
43 SCR J0945-4115 PM* 09 45 03.3142041024 -41 15 20.891735172   18.09   16.06 13.56 ~ 4 0
44 2MASS J09451914-4120434 LM* 09 45 19.1403051792 -41 20 43.409498388           M8.0 3 0
45 2MASS J09560352-3811412 LM* 09 56 03.5170523016 -38 11 41.474829192           M8.0 5 0
46 2MASS J09584191-5344477 LM* 09 58 41.9356699046 -53 44 47.850351299           M6.5 9 0
47 2MASS J10051671-1202100 LM* 10 05 16.7089565160 -12 02 10.091364684           M7.0 6 0
48 2MASS J11263190-5507420 LM* 11 26 31.9019381640 -55 07 42.170328480         18.866 M8.0 3 0
49 SIPS J1149-4012 LM* 11 49 49.7088153670 -40 12 43.434750961           M8.0 7 0
50 SIPS J1150-2850 LM* 11 50 37.9502083921 -28 50 13.135181691           L1.0 8 0
51 SIPS J1221-4548 LM* 12 21 49.1433591480 -45 48 42.055337844           M7.0 7 0
52 2MASS J14365227-5721334 LM* 14 36 52.2439074048 -57 21 33.432369048           M7.5 5 0
53 2MASS J14403186-1303263 BD* 14 40 31.8859298984 -13 03 26.319325304           L1 14 0
54 PM J14566-5059N LM* 14 56 38.8256028406 -50 59 07.801618539           M8.5 4 0
55 SIPS J1509-1932 LM* 15 09 24.5242984287 -19 32 05.960746829           M7.5 6 0
56 2MASS J15352754-2113521 LM* 15 35 27.5389152216 -21 13 52.190424552           M8.5 2 0
57 2MASS J16003857-3205247 LM* 16 00 38.5698132600 -32 05 24.891849492           M8.0 4 0
58 2MASS J17010718-2115154 LM* 17 01 07.1763442920 -21 15 15.560303688           M7.5 4 0
59 2MASS J17262168-0415357 LM* 17 26 21.6834392088 -04 15 35.683624296           M8.5 5 0
60 2MASS J17552867-0125598 LM* 17 55 28.6664463288 -01 26 00.038515452           M7.0 4 0
61 SIMP J1811556+272840 BD* 18 11 55.67544 +27 28 40.7676           L2.5 3 1
62 2MASS J18241642-3519222 LM* 18 24 16.4247914424 -35 19 22.171291860           M8.5 3 0
63 2MASS J18450771-2535130 LM* 18 45 07.7321653262 -25 35 13.298699271           M6.5 7 0
64 2MASS J19060693-0515043 LM* 19 06 06.9364930682 -05 15 04.340057029           M8.5 5 0
65 SIPS J1906-5828 LM* 19 06 25.3539066984 -58 28 25.736235852           M8.5 8 0
66 2MASS J19395199-5750339 LM* 19 39 52.0062849624 -57 50 33.834841656           M6.5V 7 0
67 2MASS J22030176-0301107 LM* 22 03 01.7688240504 -03 01 10.533511740           M9.5 4 0
68 G 275-110 LM* 23 49 51.9618427056 -26 27 59.415636960   16.2       M5.0 11 0
69 2MASS J23495306-2627542 LM* 23 49 53.0773293504 -26 27 54.247227768           L2.5 3 0
70 SIPS J2355-5800 LM* 23 55 21.8656299908 -58 00 03.566426210           M7.5 9 0

To bookmark this query, right click on this link: simbad:objects in 2024A&A...685A...6R and select 'bookmark this link' or equivalent in the popup menu