2010A&A...517A..53M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.09CEST07:35:00

2010A&A...517A..53M - Astronomy and Astrophysics, volume 517, A53-53 (2010/7-1)

Spectroscopic characterization of 78 DENIS ultracool dwarf candidates in the solar neighborhood and the Upper Scorpii OB association.

MARTIN E.L., PHAN-BAO N., BESSELL M., DELFOSSE X., FORVEILLE T., MAGAZZU A., REYLE C., BOUY H. and TATA R.

Abstract (from CDS):

We search for new ultracool dwarfs and report here our observations of 78 ultracool dwarf candidates that have been photometrically selected using the DENIS survey point source catalogue. We analyze low-resolution optical spectroscopic observations to estimate spectral types of all candidates. We derive spectral types for each object using measurements of the PC3 spectral index as defined in Martin et al. They range from M6 to L3. The Hα emission and NaI subordinate doublet (818.3nm and 819.9nm) equivalent widths are measured in the spectra to identify young stellar objects. Spectroscopic indices of TiO, VO, CrH, and FeH molecular features are also reported. A rule-of-thumb criterion for selecting young very low-mass objects using the NaI doublet equivalent width is given. It is used to confirm seven new members of the Upper Sco OB association and two new members of the R Cr-A star-forming region. Four of our field objects are also classified as very young, but are not members of any known nearby young association. The frequency of lower-gravity young objects in our field ultracool sample is 8.5%. Our results provide the first spectroscopic classification for 42 ultracool dwarfs in the solar vicinity with spectrophotometric distances in the range 17pc to 65pc (3 of them being new L dwarfs within 20pc).

Abstract Copyright:

Journal keyword(s): techniques: photometric - techniques: spectroscopic - brown dwarfs - proper motions - stars: distances

CDS comments: Table 1: object J0357290-441730 supposed to be DENIS J035726.9-441729, J0436360-295947 DENIS J043636.3-295944, J1600256-192750 DENIS J160050.6-192750, J2329343-540858 DENIS J232931.7-540858; J0314352-462341 not found.

Simbad objects: 94

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Number of rows : 94

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 GD 1332 QSO 00 00 24.4153881655 -12 45 47.804132053   16.3       ~ 24 1
2 DENIS J000028.6-124514 LM* 00 00 28.6537415422 -12 45 15.160207308       18.734 16.16 M9.2V 7 0
3 DENIS J000657.9-643654 LM* 00 06 57.9294129220 -64 36 54.235696291         16.712 M9.5 11 0
4 2MASS J00145575-4844171 BD* 00 14 55.7711152339 -48 44 16.902088987         17.544 L2.5 14 0
5 2MASS J00285545-1927165 BD* 00 28 55.4467007024 -19 27 16.527895235           L0.7V 5 0
6 SIPS J0031-3840 BD* 00 31 19.2744921940 -38 40 36.075991290         17.618 L1.2V 10 0
7 LSPM J0036+1821 BD* 00 36 16.1119130763 +18 21 10.291990145       18.451 16.053 L3.5 185 0
8 2MASSI J0050244-153818 BD* 00 50 24.4138444279 -15 38 19.167271017         16.862 L0.5V 10 0
9 2MASS J00531899-3631102 BD* 00 53 18.9753537861 -36 31 10.186742191           L4 12 0
10 2MASS J00550057-5450262 PM* 00 55 00.5730034272 -54 50 26.199091455         16.782 ~ 3 0
11 2MASS J01165283-6455570 BD* 01 16 52.8452279858 -64 55 57.001796125         17.680 L1 4 0
12 SIPS J0128-5545 BD* 01 28 26.6440088291 -55 45 34.241303192         17.067 L1 15 0
13 2MASS J01415823-4633574 BD* 01 41 58.2345784233 -46 33 57.347491326           L0gamma 62 0
14 2MASS J01473282-4954478 LM* 01 47 32.8057241025 -49 54 47.920943086           M8+L2 9 0
15 DENIS J020656.6-073519 PM* 02 06 56.6819914794 -07 35 19.840641219           M8.5V 3 0
16 2MASS J02133713-1343228 PM* 02 13 37.1117845758 -13 43 23.438321977         17.614 ~ 5 0
17 2MASS J02241193-7633201 PM* 02 24 11.9708600245 -76 33 20.065198557           ~ 1 0
18 2MASS J02271036-1624479 BD* 02 27 10.3326982645 -16 24 47.652221982         16.846 L1.5 22 0
19 2MASS J02304498-0953050 BD* 02 30 44.9996741061 -09 53 05.289943557           L0.9V 6 0
20 2MASS J02401209-5305527 PM* 02 40 12.0998646997 -53 05 52.669476380           ~ 3 0
21 DENIS J030148.8-590302 LM* 03 01 48.9295459955 -59 03 02.154813125         16.80 M9 4 0
22 2MASS J03252938-4312299 LM* 03 25 29.3722446564 -43 12 29.856160251           M9 4 0
23 LP 944-20 LM* 03 39 35.2525168530 -35 25 43.628465433     18.69 16.39 13.288 M9.5Ve 263 0
24 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2978 0
25 2MASS J03572695-4417305 BD* 03 57 26.9620991711 -44 17 30.499748423         17.86 L0beta 29 0
26 2MASS J04272708-1127143 PM* 04 27 27.0935505065 -11 27 14.555059431           M7.9V 3 0
27 2MASS J04285096-2253227 BD* 04 28 50.9701602088 -22 53 22.532753545         16.804 L0.5 15 0
28 2MASS J04363640-2959443 PM* 04 36 36.4000743462 -29 59 44.427827997         18.14 ~ 2 0
29 2MASSI J0443376+000205 LM* 04 43 37.6087816580 +00 02 05.109219492     19.6   15.877 M9.0V 43 0
30 DENIS J052957.3-200258 PM* 05 29 57.3185324090 -20 02 58.758060446         17.844 ~ 2 0
31 L 595-22 PM* 05 56 24.7419816722 -27 51 32.362978169   12.31 12.38     sdG 142 0
32 DENIS J060852.8-275358 LM* 06 08 52.8335033384 -27 53 58.318927109         17.011 M9.6V 43 0
33 2MASS J06100088-4727412 BD? 06 10 00.8824474466 -47 27 41.153664658         17.465 ~ 3 0
34 2MASS J06201654-4300073 BD? 06 20 16.5413714832 -43 00 07.303168434         17.778 ~ 2 0
35 2MASS J07193188-5051410 BD* 07 19 31.8767534915 -50 51 41.091738151         17.35 L0 13 1
36 LP 485-17 LM* 08 30 32.5702625783 +09 47 15.435406127   20.2 19.063 17.160 14.774 M7.5Ve 27 0
37 2MASS J09211410-2104446 BD* 09 21 14.1078049422 -21 04 44.422366157         16.50 L1 36 0
38 2MASSI J0953212-101420 BD* 09 53 21.2734236071 -10 14 20.670474881         16.819 L0.0V 14 0
39 2MASS J10042824-1146489 ** 10 04 28.2256458705 -11 46 49.015314646         18.021 ~ 6 2
40 2MASS J10044030-1318186 BD* 10 04 40.2977250048 -13 18 19.007660903         17.800 L1 4 0
41 SIPS J1019-2707 LM* 10 19 24.4406950592 -27 07 17.078005264       19.75 16.903 M9.1V 8 0
42 Wolf 359 Er* 10 56 28.826208 +07 00 52.34400 16.706 15.541 13.507 11.684 9.507 M6Ve 633 0
43 TYC 6653-245-1 PM* 11 15 26.1545211026 -24 31 21.988954762   11.80 11.21     ~ 1 1
44 NOMAD1 0655-0263010 PM* 11 15 29.7099694344 -24 29 34.826344853         16.50 dM8 2 1
45 LP 732-94 LM* 11 21 49.1720839605 -13 13 08.728765179     19.57     M8.5V 123 0
46 2MASS J12043036+3212595 BD* 12 04 30.3586594618 +32 12 59.518262384           L0e 15 0
47 2MASS J12065011-3937261 BD* 12 06 50.0986003172 -39 37 26.124060590         17.674 L1.9V 4 0
48 2MASS J12161209-1257309 PM* 12 16 12.0750447330 -12 57 30.723174531         18.299 ~ 3 1
49 DENIS J123218.3-095149 BD* 12 32 18.27456 -09 51 50.2632         16.97 L0 12 0
50 2MASS J12340183-1124078 PM* 12 34 01.8362220465 -11 24 07.767773510           ~ 3 0
51 2MASS J12565688+0146163 BD* 12 56 56.8908477372 +01 46 16.378125813         18.198 L1.6V 9 0
52 2MASS J13595510-4034582 BD* 13 59 55.1138685185 -40 34 58.515416266         16.985 L3.1:V 18 0
53 2MASS J14110473-7915357 PM* 14 11 04.738 -79 15 35.76         16.105 ~ 4 0
54 LP 271-25 LM* 14 28 43.2272685950 +33 10 39.245755294   21.2   17.8   M9Ve 233 0
55 LP 914-54 Er* 14 56 38.2643948965 -28 09 48.622430247     17.141 14.863 12.433 M7.0Ve 136 0
56 2MASS J15552561-1817484 * 15 55 25.6063132694 -18 17 48.519727302         14.752 ~ 4 0
57 2MASS J16005065-1927502 * 16 00 50.657 -19 27 50.22         14.68 ~ 4 0
58 UScoCTIO 100 TT* 16 02 04.3052095163 -20 50 42.583854727         15.156 M7e 34 0
59 2MASS J16025529-1922431 * 16 02 55.2962610804 -19 22 43.247993751         15.147 ~ 4 0
60 2MASS J16110142-1924489 pr* 16 11 01.4313776066 -19 24 48.979013876         15.550 M5 5 0
61 [PBB2002] USco J161112.3-192737 * 16 11 12.3778996083 -19 27 37.492690443         15.197 M5e 13 0
62 2MASS J16112959-1900292 pr* 16 11 29.5951498580 -19 00 29.273938430       19.0 16.462 M6 10 0
63 NAME Upper Sco Association As* 16 12 -23.4           ~ 1021 1
64 DENIS J162232.6-120718 LM* 16 22 32.6952880119 -12 07 19.465044740         16.564 M9 3 0
65 2MASS J16331306-7553232 PM* 16 33 13.0801504035 -75 53 22.894959998         16.122 ~ 5 0
66 VB 8 Fl* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 381 0
67 2MASS J17033555-7715210 * 17 03 35.6068407113 -77 15 21.031489947         18.250 ~ 2 0
68 2MASS J17072529-0138093 BD* 17 07 25.2888702104 -01 38 09.419185487         17.810 L1.0V 4 0
69 2MASS J17163523-0315431 * 17 16 35.2302736516 -03 15 43.264539062         14.457 ~ 2 0
70 2MASS J17534518-6559559 BD* 17 53 45.1867101733 -65 59 55.671630893         17.80 L4 17 0
71 2MASS J19013913-3700173 Y*O 19 01 39.1393932477 -37 00 17.482456454       21.07 18.023 L0? 6 0
72 2MASS J19074402-2824205 PM* 19 07 44.0228740518 -28 24 20.470251819         17.736 ~ 3 0
73 NAME CrA Complex reg 19 15 00.0 -37 30 00           ~ 101 1
74 VB 10 Er* 19 16 57.6103282334 +05 09 01.588675251     17.30     M8V 435 1
75 2MASS J19260048-6500066 PM* 19 26 00.4868136207 -65 00 06.779365778         17.905 ~ 1 0
76 DENIS J193451.1-184134 PM* 19 34 51.2032558703 -18 41 34.642858761           M8.5V 4 0
77 2MASS J19355595-2846343 LM* 19 35 55.9638711981 -28 46 34.419297705           M9 12 0
78 2MASS J19564606-7747177 * 19 56 46.0607212726 -77 47 17.780192894         17.461 ~ 1 0
79 2MASS J20131084-1242452 BD* 20 13 10.8306493536 -12 42 45.237412972           L0.7V 4 0
80 2MASS J20304119-3635094 PM* 20 30 41.2020144401 -36 35 09.541951684         17.505 ~ 2 0
81 2MASS J20450238-6332066 BD* 20 45 02.3968336560 -63 32 06.584854738       19.03 16.053 L1 16 0
82 2MASS J21263403-3143224 LM* 21 26 34.0358513465 -31 43 22.517873981           M9.2V 6 0
83 2MASS J21391365-3529507 BD* 21 39 13.6512572728 -35 29 50.676658734           L2.1:V 3 0
84 DENIS J214351.5-833713 LM* 21 43 51.6354128430 -83 37 13.568626091         16.082 ~ 5 0
85 DENIS J215013.3-661036 LM* 21 50 13.2440525427 -66 10 36.643459706         17.226 M9 4 0
86 SIPS J2150-7520 BD* 21 50 15.7717344236 -75 20 36.727695654         17.530 L1: 10 1
87 2MASS J22431696-5932206 BD* 22 43 16.9745933546 -59 32 20.424376510       20.24 17.272 L0:: 10 0
88 SIPS J2308-2721 BD* 23 08 11.3863684536 -27 22 00.629714886           L1.4V 7 0
89 Feige 110 HS* 23 19 58.3995050606 -05 09 56.170282845 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 552 1
90 2MASS J23224684-3133231 BD* 23 22 46.8276915604 -31 33 23.488659629         16.841 L1.6:V 18 0
91 2MASS J23293174-5408587 PM* 23 29 31.7607105068 -54 08 58.959878117         18.37 M8 2 0
92 2MASSI J2330225-034718 BD* 23 30 22.58496 -03 47 18.9672           L0.5V 7 0
93 DENIS J234539.0+005514 LM* 23 45 39.0315449870 +00 55 13.728586050         16.902 M9V 15 0
94 2MASS J23545993-1852216 BD* 23 54 59.9239127924 -18 52 21.899605276         17.491 L2.6:V 5 0

    Equat.    Gal    SGal    Ecl

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2020.07.09-07:35:00

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