1998AJ....116.1376S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST06:53:21

1998AJ....116.1376S - Astron. J., 116, 1376-1387 (1998/September-0)

Star formation in Bok globules: near-infrared survey of a southern sky sample.

SANTOS N.C., YUN J.L., SANTOS C.A. and MARREIROS R.G.

Abstract (from CDS):

We performed a near-infrared imaging survey toward 23 Bok globules in the southern sky containing IRAS point sources. Visual examination of the images revealed that 15 globules showed evidence of nebular emission or very red stellar objects located at the position of the sources. Analysis of the near-infrared nebulosities present in the images revealed that (1) these nebulosities generally contain one or more stellar-like sources surrounded by a more or less extended component; (2) a couple of possible binaries with separations of about 4" were found to reside in common infrared nebulosity; (3) infrared reflection nebulae, seen at 2.2 µm, are usually associated with class I sources. The nature of the southern sky sample of Bok globules seems to be similar to that of the northern sample of globules, with similar star formation properties: they tend to form a single or a few stars, and in some cases, they seem to be lodging small aggregates of young stellar objects. We confirm that, in general, the value of the 12/25 µm spectral index is a good indicator of the evolutionary stage of a young stellar object. Large negative 12/25 µm indices seem to indicate younger objects deeply embedded in their clouds (by showing nebulosities mostly in the K band, having associated molecular outflows, and no optical counterparts). As these objects reach later stages of their pre-main-sequence evolution (becoming optically visible), their 12/25 µm indices increase and become positive.

Abstract Copyright:

Journal keyword(s): ISM: Globules - ISM: Jets and Outflows - ISM: Reflection Nebulae - Stars: Formation - Stars: Individual: Alphanumeric: IRAS 08337-4028 - Stars: Pre-Main-Sequence

Nomenclature: Table 3: [SYS98] HHMMSS.s-DDMMSS N=16.

Simbad objects: 37

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Number of rows : 37

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 IRAS 07178-4429 mul 07 19 25.8 -44 35 01           ~ 17 0
2 CG 30 CGb 08 09 32.8 -36 05 00           ~ 120 0
3 IRAS 08124-3422 IR 08 14 25.1 -34 31 13           ~ 9 0
4 2MASS J08254384-5100326 Y*O 08 25 43.85 -51 00 32.7           ~ 298 1
5 IRAS 08261-5100 MoC 08 27 38.9 -51 10 38           ~ 29 0
6 [SYS98] 082611.7-510044 Y*O 08 27 39.1 -51 10 44           ~ 1 0
7 V* AT Pyx Or* 08 28 40.6971304655 -33 46 22.287241515     12.7     K2.0 29 1
8 [SYS98] 082611.6-510040 Y*O 08 29 24 -51 10.8           ~ 1 0
9 IRAS 08337-4028 IR 08 35 31.00392 -40 38 24.8604           ~ 20 0
10 IRAS 08433-5945 IR 08 44 21.9 -59 56 10           ~ 7 0
11 NAME BHR 71 MM HII 12 01 37.1 -65 08 54           ~ 33 0
12 NSV 19435 V* 12 37 33.9222675136 -69 27 05.179806234     14.8     ~ 10 1
13 Sandqvist 160 DNe 13 06.9 -77 01           ~ 41 0
14 PSCz Q13036-7644 Y*O 13 07 36.89 -77 00 09.7           ~ 39 1
15 [SYS98] 132225.5-592803 Y*O 13 25 40.1 -59 43 39           ~ 1 0
16 2MASS J13254091-5943365 Y*O 13 25 40.918 -59 43 36.52           ~ 1 0
17 2MASS J13254136-5943473 Y*O 13 25 41.3529530605 -59 43 47.437391659           ~ 1 0
18 IRAS 13224-5928 IR 13 25 44.64 -59 43 50.9           ~ 11 0
19 [SYS98] 135438.1-394126 Y*O 13 57 38.9 -39 56 02           ~ 1 0
20 [SYS98] 135438.1-394124 Y*O 13 57 38.9 -39 56 00           ~ 1 0
21 CG 12 CGb 13 57 42.2 -39 56 21           ~ 48 1
22 2MASS J13574310-3956240 Y*O 13 57 43.10 -39 56 24.1           ~ 1 0
23 HD 130079 *iN 14 49 16.5249986306 -65 15 18.564376409   10.82 10.53     B9V 22 1
24 IRAS 16009-3927 * 16 04 17.1122528774 -39 36 07.537384517           ~ 3 0
25 [SYS98] 160257.9-454808 Y*O 16 06 31.7 -45 56 11           ~ 4 0
26 IRAS 16510-4026 IR 16 54 35.8 -40 31 35           ~ 6 0
27 IRAS 17012-3603 IR 17 04 34.68048 -36 07 20.3736           ~ 5 0
28 [SYS98] 171542.9-321257 Y*O 17 18 57.4 -32 16 04           ~ 6 0
29 2MASS J17190912-3328067 IR 17 19 09.1239438172 -33 28 06.779912103         17.17 ~ 5 0
30 2MASS J17191056-3327459 IR 17 19 10.5627383534 -33 27 46.035271185           ~ 5 0
31 IRAS 17159-3324 Y*O 17 19 11.154 -33 27 17.94           ~ 3 0
32 [SYS98] 171716.1-431655 Y*O 17 20 51.7 -43 19 52           ~ 7 0
33 2MASS J17214591-4408455 Y*O 17 21 45.9190226680 -44 08 45.445011956           ~ 1 0
34 2MASS J17214683-4408477 Y*O 17 21 46.8335634070 -44 08 47.639575925           ~ 1 0
35 IRAS 17181-4405 IR 17 21 46.9 -44 08 42           ~ 10 0
36 2MASS J17214734-4408498 Y*O 17 21 47.343 -44 08 49.83           ~ 1 0
37 IRAS 17193-4319 IR 17 22 54.8 -43 22 13           ~ 7 0

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