2010A&A...510A...1H

Query : 2010A&A...510A...1H

2010A&A...510A...1H - Astronomy and Astrophysics, volume 510, A1-1 (2010/2-1)

Near infrared imaging of the cometary globule CG 12.

HAIKALA L.K. and REIPURTH B.

Abstract (from CDS):

Cometary globule 12 is a relatively little investigated medium- and low mass star forming region 210 pc above the Galactic plane. This study sets out to discover the possibly embedded members of the CG 12 stellar cluster, to refine the NIR photometry of the known member stars and to study the star formation activity in CG 12 and its relation to the distribution of molecular gas, dust and mid- to far-infrared emission in the cloud. NIR J, H, and Ks imaging and stellar photometry is used to analyse the stellar content and the structure of CG 12. Several new members and member candidates of the CG 12 stellar cluster were found. The new members include in particular a highly embedded source with a circumstellar disk or shell and a variable star with a circumstellar disk which forms a binary with a previously known A spectral type cluster member. The central source of the known collimated molecular outflow in CG 12 and an associated ``hourglass''-shaped object due to reflected light from the source were also detected. The maximum visual extinction in the cloud, based on observations of background stars, is ∼20m, but this is only a lower limit for the extinction through the two dense cloud cores. HIRES-enhanced IRAS images are used together with JHKs imaging to study the two associated IRAS point sources, 13546-3941 and 13547-3944. Two new 12µm sources coinciding with NIR excess stars were detected in the direction of IRAS 13546-3941. The IRAS 13547-3944 emission at 12 and 25µm originates in the Herbig AeBe star h4636n and the 60 and 100µm emission from an adjacent cold source.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main-sequence - ISM: individual objects: CG 12 - ISM: individual objects: NGC5367 - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/510/A1): table1.dat>

Nomenclature: Text: NAME CG 12 cluster. Table 1: [HR2010] NNN (Nos 1-227) = [HR2010] JHHMMSS.ss+DDMMSS.s N=227. Paragr. 4.1.4: [HR2010] W77-6a (Nos a-b).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

CDS comments: In ref list 1977 Williams MNRAS, 181, 179 is a misprint for 1977 Williams MNRAS, 180, 709.

Simbad objects: 28

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Number of rows : 28
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 NGC 1333 OpC 03 29 11.3 +31 18 36           ~ 1450 1
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4415 0
3 NAME GUM Nebula ISM 07 43 -42.1           ~ 421 1
4 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
5 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
6 [GFL2008] I 23 * 13 57 23.2186719096 -39 57 49.952606148     16.93 16.93 15.04 ~ 2 0
7 [B77] 146 GNe 13 57.4 -39 56           ~ 4 0
8 IRAS 13543-3941 IR 13 57 24.5 -39 55 58           ~ 5 0
9 NGC 5367 7 * 13 57 25.8395600928 -39 58 37.260821892 14.13 13.95 13.31 13.40 12.62 F4 5 0
10 [GFL2008] I 29 * 13 57 26.0154665856 -39 56 27.224279196       18.29 16.71 ~ 2 0
11 NGC 5367 8 * 13 57 26.1017531712 -39 56 09.286010016   13.59 12.91 12.92 11.76 A2 5 0
12 [GFL2008] I 36 * 13 57 32.1763277592 -39 58 36.475411872     18.70 17.30 16.11 ~ 2 0
13 2MASS J13573749-3955595 X 13 57 37.499 -39 55 59.55           ~ 2 0
14 2MASS J13573821-3959477 X 13 57 38.215 -39 59 47.78           ~ 2 0
15 [GFL2008] I 47 * 13 57 39.7332823344 -39 54 03.605037696     18.10 16.85 15.75 ~ 2 0
16 UCAC2 14621059 * 13 57 40.5967821576 -40 00 59.142622320         11.88 ~ 1 0
17 2MASS J13574147-3959252 NIR 13 57 41.472 -39 59 25.28           ~ 1 0
18 NAME CG 12 Cluster Cl* 13 57 42.2 -39 56 21           ~ 1 0
19 CG 12 CGb 13 57 42.2 -39 56 21           ~ 49 1
20 NGC 5367 RNe 13 57 44 -39 58.8           ~ 30 1
21 CD-39 8581 ** 13 57 44.11656 -39 58 44.1660           B4+B7 51 0
22 [HR2010] W77-6b * 13 57 44.43 -39 56 50.6           ~ 1 0
23 [HR2010] W77-6a * 13 57 44.43 -39 56 50.6           ~ 1 0
24 NGC 5367 6 * 13 57 44.4333448704 -39 56 50.575931520   13.80 13.30     A4 6 0
25 UCAC2 14621069 * 13 57 45.1114006488 -40 01 07.194565236     15.16 15.57 13.88 ~ 2 0
26 NGC 5367 5 * 13 57 48.0404945952 -39 57 29.665768356   13.71 12.77 12.59 11.84 G9 6 0
27 CD-39 8583 * 13 57 56.0166605088 -40 04 19.291406268   10.21 10.11 8.07   B8 11 0
28 IRAS 13549-3950 IR 13 57 58.2 -40 04 49           ~ 4 0

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