2005A&A...434..585N


Query : 2005A&A...434..585N

2005A&A...434..585N - Astronomy and Astrophysics, volume 434, 585-592 (2005/5-1)

Star formation in Sandqvist 187 and 188.

NIELBOCK M. and CHINI R.

Abstract (from CDS):

We present 1.2mm continuum data of the filamentary dark cloud Sandqvist 187/188 - also known as the Norma cloud - taken with SIMBA (SEST Imaging Bolometer Array). The data are complemented by measurements from the 2MASS, MSX and IRAS surveys. The extended 1.2mm emission traces the optical dark cloud down to a visual extinction of AV=3.7mag. We derive a mean column density of N(H2)=1.4x1022cm–2, equivalent to a visual extinction of AV=7.6mag and a total mass of the cloud of 340M. We also find six compact millimetre sources, labelled MMS 1 to 6, five of which coincide with known stellar objects. MMS 6, however, only has a very weak MSX counterpart at 14.56µm and an absorption feature at 8.28µm consistent with a visual extinction of AV>145mag. Dust temperatures, luminosities and gas masses for all compact millimetre sources are given. In an effort to further constrain the uncertain distance to Sandqvist 187/188, we analyse its stellar content based on 2MASS colours and find an improved lower limit of 440±50pc.

Abstract Copyright:

Journal keyword(s): ISM: clouds - dust, extinction - ISM: individual objects: Sandqvist 187 - ISM: individual objects: Sandqvist 188 - stars: pre-main sequence

Nomenclature: Table 1: [NC2005] MMS N (Nos 1-6).

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1103 2
2 M 42 HII 05 35 17.3 -05 23 28           ~ 3900 0
3 OMC 3 MoC 05 35 20.0 -05 01 00           ~ 249 1
4 OMC 2 MoC 05 35 27 -05 10.1           ~ 427 1
5 NAME Ori A MoC 05 38 -07.1           ~ 2841 0
6 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 955 1
7 NAME Centaurus A Sy2 13 25 27.6039817176 -43 01 09.493008456   8.18 6.84 6.66   ~ 4230 3
8 NAME Lupus Complex SFR 16 03 -38.1           ~ 604 0
9 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3334 1
10 Sandqvist 187 Cld 16 32 17.2 -44 53 40           ~ 20 1
11 HBC 645 Em* 16 32 27.22 -44 55 36.0           ~ 25 0
12 2MASS J16322723-4455303 mm 16 32 27.23 -44 55 30.3           ~ 2 0
13 2MASS J16322724-4455315 NIR 16 32 27.24 -44 55 31.5           ~ 2 0
14 [SW2001] Reipurth 13 SM smm 16 32 27.79 -44 55 29.7           ~ 3 0
15 HH 56 HH 16 32 29.32 -44 54 57.5           ~ 41 0
16 HH 57 HH 16 32 31.96 -44 55 37.2           ~ 68 1
17 IRAS 16289-4449 Or* 16 32 32.19264 -44 55 30.6552       15.95   ~ 127 1
18 HD 328329 * 16 32 32.6751466392 -44 56 38.928594084   11.94 11.54     A2 3 0
19 [NC2005] MMS 3 mm 16 33 04.8 -44 58 19           ~ 1 0
20 [NC2005] MMS 5 mm 16 33 07.2 -44 59 24           ~ 1 0
21 IRAS 16295-4452 Y*? 16 33 07.73 -44 58 24.7           ~ 9 0
22 NAME Norma Cloud Cld 16 34 -45.0           ~ 26 1
23 IRAS 16306-4455 IR 16 34 15.6 -45 01 27           ~ 5 0
24 Sandqvist 188 Cld 16 34.6 -45 03           ~ 3 1
25 IRAS 16311-4457 mul 16 34 43.16592 -45 03 34.4088           ~ 4 0
26 HD 328406 * 16 35 12.4417433472 -45 03 36.222566436   12.26 11.58     F0 3 0
27 [NC2005] MMS 6 mm 16 35 36.8 -45 02 48           ~ 1 0
28 * lam Sco bC* 17 33 36.52012 -37 06 13.7648 0.52 1.48 1.62     B2IV+DA7.9 380 1
29 QSO J1800-241 QSO 18 00 30.3898648512 -24 04 02.807778180           ~ 6 0
30 * alf Sct PM* 18 35 12.4271571798 -08 14 38.653839451 6.70 5.17 3.83 2.86 2.18 K3III 177 0
31 NAME Coronet Cluster Cl* 19 01 54 -36 57.2           ~ 85 1
32 * alf Cyg sg* 20 41 25.91514 +45 16 49.2197 1.11 1.34 1.25 1.14 1.04 A2Ia 731 0

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2022.05.23-14:34:07

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