2007AJ....133.1321G


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.14CEST00:47:30

2007AJ....133.1321G - Astron. J., 133, 1321-1330 (2007/April-0)

Hubble Space Telescope NICMOS observations of NGC 1333: the ratio of stars to substellar objects.

GREISSL J., MEYER M.R., WILKING B.A., FANETTI T., SCHNEIDER G., GREENE T.P. and YOUNG E.

Abstract (from CDS):

We present an analysis of NICMOS photometry and low-resolution grism spectroscopy of low-mass stars and substellar objects in the young star-forming region NGC 1333. Our goal is to constrain the ratio of low-mass stars to substellar objects down to 20MJup in the cluster, as well as constrain the cluster initial mass function (IMF) down to 30MJup, in combination with a previous survey of NGC 1333 by Wilking et al. Our survey covers four fields of 51.2"x51.2", centered on brown dwarf candidates previously identified in Wilking et al. We extend previous work based on the use of a water vapor index for spectral typing to wavelengths accessible with NICMOS on the Hubble Space Telescope. Spectral types were derived for the 14 brightest objects in our fields, ranging from ≤M0 to M8, which, at the age of the cluster (0.3 Myr), correspond to a range in mass of ≥0.25-0.02 M. In addition to the spectra, we present an analysis of the color-magnitude diagram using pre-main-sequence evolutionary models of D'Antona & Mazzitelli. Using an extinction-limited sample, we derive the ratio of low-mass stars to brown dwarfs. Comparisons of the observed ratio to that expected from the field IMF of Chabrier indicate that the two results are consistent. We combine our data with those of Wilking et al. to compute the ratio of intermediate-mass stars (0.1-1.0 M) to low-mass objects (0.03-0.1 M) in the cluster. We also report the discovery of a faint companion to the previously confirmed brown dwarf ASR 28, as well as a possible outflow surrounding ASR 16. If the faint companion is confirmed as a cluster member, it would have a mass of ~5MJup (mass ratio 0.15) at a projected distance of 350 AU, similar to that of 2MASS 1207-3923B.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - ISM: Individual: NGC Number: NGC 1333 - Stars: Formation - Stars: Low-Mass, Brown Dwarfs - Stars: Luminosity Function, Mass Function - Stars: Pre-Main-Sequence

Nomenclature: Table 2: [GMW2007] SN-NN, [GMW2007] SNA-N, N=32.

CDS comments: Tables 1 and 3, some coordinates are incorrect. Par. 4.3. : 2MASS 1207-3923 = 2MASS J12073346-3932539.

Simbad objects: 69

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Number of rows : 69

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* TZ Ari Er* 02 00 12.9561933930 +13 03 07.021294655 15.406 14.100 12.298 10.943 9.195 M4.5V 248 0
2 DENIS J020529.0-115925 BD* 02 05 29.40072 -11 59 29.6736           L7V 141 0
3 ASR 109 LM* 03 28 54.928 +31 15 29.01           M7.9 9 0
4 [GMW2007] S1-2 * 03 28 55.334 +31 15 53.83           ~ 1 0
5 2MASS J03285601+3115471 * 03 28 56.01 +31 15 47.1           ~ 6 0
6 ASR 15 LM* 03 28 56.9508334453 +31 15 50.400343354       21.2   M7.5V 11 0
7 ASR 17 Y*O 03 28 57.15096 +31 15 34.5996           M7.5V 20 0
8 [GMW2007] S1-6 * 03 28 57.30 +31 15 36.6           ~ 3 0
9 [GMW2007] S1-7 * 03 28 57.990 +31 15 50.36           ~ 1 0
10 [GMW2007] S1-8 * 03 28 58.058 +31 15 48.65           ~ 1 0
11 MBO 78 LM* 03 29 00.153 +31 21 09.21           M5 11 0
12 [GMW2007] S2-1 Y*O 03 29 01.59 +31 17 12.8           ~ 2 0
13 [GMW2007] S2-2 * 03 29 01.876 +31 16 43.98           ~ 1 0
14 ASR 11 Y*? 03 29 01.89 +31 16 53.4           M4 9 0
15 [GMW2007] S2-4 * 03 29 02.654 +31 17 14.84           ~ 1 0
16 [GMW2007] S2-5 Y*O 03 29 04.03 +31 17 00.4           ~ 2 0
17 ASR 8 Y*O 03 29 04.0654589569 +31 17 07.500180814           M7 16 0
18 MBO 20 Y*O 03 29 04.1669369430 +31 25 15.085873408           M2.0 9 0
19 2MASS J03290417+3116508 ** 03 29 04.17 +31 16 50.8           ~ 4 1
20 [GMW2007] S2-7 * 03 29 04.179 +31 16 50.93           ~ 1 0
21 [GMW2007] S2-8 * 03 29 04.229 +31 16 50.60           ~ 1 0
22 ASR 105 LM* 03 29 04.662 +31 16 59.15           M6 19 0
23 [GMW2007] S2-10 Y*O 03 29 05.38 +31 17 03.3           ~ 2 0
24 [GMW2007] S3B-6 Y*O 03 29 10.75 +31 17 22.2           ~ 2 0
25 ASR 23 Y*O 03 29 10.8219747734 +31 16 42.675618574           M0- 17 0
26 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1268 1
27 ASR 24 Y*O 03 29 11.3088574788 +31 17 17.571489316           M8V 14 0
28 [GMW2007] S3A-3 * 03 29 12.923 +31 17 08.34           ~ 1 0
29 ASR 25 Y*? 03 29 12.9556593617 +31 17 07.125014995           M4 4 0
30 [GMW2007] S3B-7 * 03 29 13.034 +31 17 37.34           ~ 1 0
31 ASR 28 LM* 03 29 13.0399551632 +31 17 38.319682784           M8.0 13 0
32 ASR 26 LM* 03 29 13.05216 +31 16 39.8676           M0- 4 0
33 [GMW2007] S3A-5 * 03 29 13.269 +31 17 17.35           ~ 1 0
34 [GMW2007] S3A-6 * 03 29 13.283 +31 16 45.91           ~ 1 0
35 [GMW2007] S3B-5 * 03 29 13.351 +31 17 16.01           ~ 1 0
36 ASR 27 Y*O 03 29 13.40 +31 17 16.9           ~ 3 1
37 ASR 29 LM* 03 29 13.617 +31 17 43.50           M5 9 0
38 [GMW2007] S3A-7 * 03 29 14.43 +31 17 00.3           ~ 2 0
39 IC 348 OpC 03 44 34 +32 09.8           ~ 1257 1
40 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 3092 0
41 Cl* Melotte 22 TEIDE 1 LM* 03 47 17.9128387886 +24 22 31.730547022         19.26 M8.0 104 0
42 Cl* Melotte 22 ROQUE 25 BD* 03 48 30.73544 +22 44 50.5385         21.80 L0.1 20 0
43 Cl* Melotte 22 NPL 40 LM* 03 48 49.04436 +24 20 25.6827         20.55 M9.8 13 0
44 [BZR99] S Ori 47 BD* 05 38 14.62416 -02 40 15.4020         20.53 L1e 28 0
45 2MASS J05381741-0240242 BD* 05 38 17.4137148747 -02 40 24.281223771   23.24   19.21 17.09 M5/7V 24 0
46 [BZR99] S Ori 60 BD* 05 39 37.51848 -02 30 41.9220         22.75 L2 18 0
47 Ross 47 BY* 05 42 09.2672965388 +12 29 21.611736198 14.264 13.130 11.509 10.298 8.709 M4V 233 0
48 Ass Mon R 2 As* 06 07 47.8 -06 22 55           ~ 46 1
49 G 51-15 Er* 08 29 49.3528237575 +26 46 33.626773321   16.87   14.736   M6.5Ve 260 0
50 BD+02 2098 PM* 08 55 07.6219262945 +01 32 47.416477421 12.642 11.30 9.997 9.072 8.204 M0V 94 1
51 BD+20 2465 Er* 10 19 36.2808024653 +19 52 12.014037746   10.82 9.52 9.19   dM3 1187 0
52 Wolf 359 Er* 10 56 28.826208 +07 00 52.34400 16.706 15.541 13.507 11.684 9.507 dM6 644 0
53 TWA 27 LM* 12 07 33.4676156527 -39 32 54.016042897     19.95 17.99 15.88 M8IVe 316 0
54 DENIS J122815.2-154733 BD* 12 28 15.23184 -15 47 34.2312       20.187 18.163 L5.5+L5.5 137 0
55 Wolf 424 Er* 12 33 17.361480 +09 01 15.79224 15.398 14.313 12.467 10.937 8.988 M5.5V 305 0
56 NAME Kelu-1 BD* 13 05 40.1737206066 -25 41 05.830344467         16.85 L2+L3.5 240 0
57 LP 271-25 LM* 14 28 43.2272685950 +33 10 39.245755294   21.2   17.8   M9Ve 235 0
58 BD+16 2708B SB* 14 54 29.4185719182 +16 06 08.616294953           M8.5 132 0
59 LP 914-54 Er* 14 56 38.2643948965 -28 09 48.622430247     17.141 14.863 12.433 M7.0Ve 141 0
60 BD+26 2723 PM* 15 43 02.1172459933 +26 16 35.980567156   11.98 10.691 10.319   K7V 20 0
61 G 202-45 SB* 16 24 09.3137145795 +48 21 11.107573476   12.099       M3.0Ve 171 1
62 VB 8 Er* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 396 0
63 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 693 2
64 Wolf 1062 ** 19 12 14.6156897487 +02 53 11.438190161 13.722 12.663 11.143 10.016 8.534 M3.5V 137 0
65 VB 10 Er* 19 16 57.6103282334 +05 09 01.588675251     17.30     M8V 443 1
66 G 208-44 Er* 19 53 54.4821159649 +44 24 51.341564299   15.31 13.126 13.083 9.78 M5.5Ve 194 1
67 NAME HDF-S reg 22 32 56 -60 33.0           ~ 548 0
68 BD+19 5116 ** 23 31 52.17898 +19 56 14.1505 12.737 11.749 10.165 8.982 7.446 M4+M5 427 0
69 V* BR Psc BY* 23 49 12.5251391270 +02 24 04.403044891 11.532 10.427 8.993 8.029 6.946 dM1 291 0

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2021.06.14-00:47:30

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