2022A&A...664A.111B

Query : 2022A&A...664A.111B

2022A&A...664A.111B - Astronomy and Astrophysics, volume 664A, 111-111 (2022/8-1)

Infrared spectroscopy of free-floating planet candidates in Upper Scorpius and Ophiuchus.

BOUY H., TAMURA M., BARRADO D., MOTOHARA K., CASTRO RODRIGUEZ N., MIRET-ROIG N., KONISHI M., KOYAMA S., TAKAHASHI H., HUELAMO N., BERTIN E., OLIVARES J., SARRO L.M., BERIHUETE A., CUILLANDRE J.-C., GALLI P.A.B., YOSHII Y. and MIYATA T.

Abstract (from CDS):


Context. A rich population of low-mass brown dwarfs and isolated planetary mass objects has been reported in the Upper Scorpius and Ophiuchus star-forming complex.
Aims. We investigate the membership, nature, and properties of 17 of these isolated planetary mass candidates using low-resolution near-infrared spectra.
Methods. We investigated the membership by looking for evidence of their youth using four diagnostics: the slope of the continuum between the J and Ks band, the Hcont, and the TLI-g gravity-sensitive indices. In addition, we compared the spectra to young and field (old) M and L-dwarf standards.
Results. All the targets but one are confirmed as young ultracool objects, with spectral types between L0 and L6 and masses in the range 0.004-0.013 M☉, according to evolutionary models. The status of the last target is unclear at this point.
Conclusions. Only one possible contaminant has been identified among the 17 targets, suggesting that the contamination level of the original sample must be low (≤6%).

Abstract Copyright: © H. Bouy et al. 2022

Journal keyword(s): brown dwarfs - stars: late-type - stars: pre-main sequence - planets and satellites: formation

VizieR on-line data: <Available at CDS (J/A+A/664/A111): table1.dat tableb4.dat fits/*>

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 2MASS J00013044+1010146 LM* 00 01 30.4547047752 +10 10 14.816690076           M6V 5 0
2 NAME L 362-29 BC BD* 00 04 34.8671722377 -40 44 06.463544237       19.61 16.88 L5+L5 111 0
3 SSSPM J0006-2157 LM* 00 05 48.4619765971 -21 57 19.765454675   20.3 20.2 19.42 16.46 M8.7V 14 0
4 2MASS J00062050-1720506 BD* 00 06 20.4959821884 -17 20 50.847041234           L3.0V 7 2
5 2MASS J00063258+1406064 BD* 00 06 32.58768 +14 06 06.4368           L0.4V 6 0
6 2MASS J00064916-0852457 BD* 00 06 49.1629205804 -08 52 46.175692098           L1.0 22 0
7 2MASS J00085931+2911521 LM* 00 08 59.3029467432 +29 11 51.872732808           M8.5 5 0
8 2MASSI J0010001-203112 BD* 00 10 00.1039861824 -20 31 12.218496636           L0 9 0
9 2MASS J00135779-2235200 BD* 00 13 57.7902139080 -22 35 20.304948624           L5.7V 11 0
10 2MASS J00144919-0838207 BD* 00 14 49.1134104836 -08 38 20.542837506           sdL0 12 0
11 2MASS J00145575-4844171 BD* 00 14 55.7697032297 -48 44 16.905420854         17.544 L2.5 19 0
12 2MASSW J0015447+351603 BD* 00 15 44.7745521624 +35 16 02.641954548           L1.0V 45 0
13 2MASS J00160844-0043021 BD* 00 16 08.47416 -00 43 02.2944           L5.5 12 0
14 2MASS J00163761+3448368 PM* 00 16 37.5963702216 +34 48 36.810201096           M8.5 4 0
15 LSPM J0036+1821 BD* 00 36 16.1118891182 +18 21 10.286665966       18.451 16.053 L3.5 213 0
16 2MASS J01415823-4633574 BD* 01 41 58.2329929560 -46 33 57.347594316           L0gamma 69 0
17 HD 16270B BD* 02 35 59.9394221640 -23 31 20.410151736           L1.5 42 0
18 LP 944-20 LM* 03 39 35.2523500210 -35 25 43.641996333     18.69 16.39 13.288 M9.5Ve 289 0
19 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4416 0
20 2MASS J05012406-0010452 BD* 05 01 24.0852555792 -00 10 45.591750444           L4gamma 55 0
21 2MASSI J0518461-275645 BD* 05 18 46.1651510160 -27 56 45.713630832           L1.0V 29 0
22 2MASSI J0536199-192039 BD* 05 36 20.0168030088 -19 20 40.151155452           L2 23 0
23 2MASS J10101480-0406499 BD* 10 10 14.80704 -04 06 49.9320           L6 60 0
24 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1892 1
25 TWA 42 BD* 11 19 32.54328 -11 37 46.6968           L7 38 0
26 TWA 26 LM* 11 39 51.1378374696 -31 59 21.443660124         15.83 M8e 108 0
27 TWA 41 BD* 11 47 24.21360 -20 40 20.4384           L7V 29 0
28 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 338 0
29 2MASS J14460061+0024519 BD* 14 46 00.61560 +00 24 51.9660           L5V 35 0
30 2MASSW J1506544+132106 BD* 15 06 54.3299045806 +13 21 06.039351151           L3 103 0
31 2MASSI J1526140+204341 BD* 15 26 14.0097630623 +20 43 40.439684259           L5 36 0
32 HD 143956 * 16 04 00.2383602864 -19 46 02.926413336   7.91 7.77     B9Van 52 0
33 NAME Upper Sco Association As* 16 12 -23.4           ~ 1369 1
34 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1330 1
35 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3631 1
36 HD 149382 HS* 16 34 23.3333693424 -04 00 52.030152000 7.518 8.661 8.943 9.070 9.205 sdB 139 1
37 HD 151355 * 16 46 46.9390222704 +02 12 34.394920632   8.76 8.85     B4/5V 11 0
38 2MASS J17410280-4642218 BD* 17 41 02.80656 -46 42 21.8520           L5:gamma 23 0
39 VB 10 Er* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 476 1
40 2MASS J20575409-0252302 BD* 20 57 54.0936475128 -02 52 30.247487652           L1 63 0
41 2MASS J21140802-2251358 BD* 21 14 08.02560 -22 51 35.8380           L7.5 111 0
42 2MASSW J2208136+292121 BD* 22 08 13.63056 +29 21 21.5352           L3gamma 54 0
43 2MASS J22443167+2043433 BD* 22 44 31.67376 +20 43 43.3020           L6-L8gamma 99 0

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