2002MNRAS.331...85R

Query : 2002MNRAS.331...85R

2002MNRAS.331...85R - Mon. Not. R. Astron. Soc., 331, 85-97 (2002/March-3)

Photodissociation regions and star formation in the Carina nebula.

RATHBORNE J.M., BURTON M.G., BROOKS K.J., COHEN M., ASHLEY M.C.B. and STOREY J.W.V.

Abstract (from CDS):

We have obtained wide-field thermal infrared (IR) images of the Carina nebula, using the SPIREX/Abu telescope at the South Pole. Emission from polycyclic aromatic hydrocarbons (PAHs) at 3.29µm, a tracer of photodissociation regions (PDRs), reveals many interesting well-defined clumps and diffuse regions throughout the complex. Near-IR images (1-2µm), along with images from the Midcourse Space Experiment (MSX) satellite (8-21µm) have been incorporated to study the interactions between the young stars and the surrounding molecular cloud in more detail. Two new PAH emission clumps have been identified in the Keyhole nebula, and have been mapped in 12 CO(2-1) and (1-0) using the Swedish-ESO Submillimetre Telescope (SEST). Analysis of their physical properties reveals that they are dense molecular clumps, externally heated with PDRs on their surfaces and supported by external pressure in a similar manner to the other clumps in the region. A previously identified externally heated globule containing IRAS 10430-5931 in the southern molecular cloud shows strong 3.29-, 8- and 21-µm emission, the spectral energy distribution (SED) revealing the location of an ultracompact (UC) Hii region. The northern part of the nebula is complicated, with PAH emission intermixed with mid-IR dust continuum emission. Several point sources are located here, and through a two-component blackbody fit to their SEDs we have identified three possible UC Hii regions as well as a young star surrounded by a circumstellar disc. This implies that star formation in this region is ongoing and not halted by the intense radiation from the surrounding young massive stars.

Abstract Copyright: 2002 Blackwell Science Ltd

Journal keyword(s): stars: formation - Hii regions - ISM: individual: Carina nebula - ISM: lines and bands - ISM: molecules - ISM: structure

Nomenclature: Table 1, Fig.1: [CB95] N (Nos 7-8) added. Table 1, Fig.1: [RBB2002] W (Nos N, S). Table 4, Fig.11: [RBB2002] WN (Nos N1-N4), [RBB2002] AN (Nos R1-R3)

CDS comments: p.93: sources 1, 3 = [MCB96] 1, 3.

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 - 2026 		#notes
1 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
2 NAME Rosette Molecular Cloud MoC 06 34.7 +04 02           ~ 277 0
3 [RBB2002] N reg 10 43 20 -59 34.9           ~ 1 0
4 [W94d] Car I-W Rad 10 43 21.4 -59 34 27           ~ 10 0
5 [W94d] Car I-E Rad 10 43 31.9 -59 35 28           ~ 9 0
6 NAME Carina I HII Region HII 10 43 32 -59 35.0           ~ 59 0
7 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0
8 [RBB2002] N1 * 10 44 04.52 -59 33 43.7   17.500 16.350   14.746 ~ 7 1
9 [BGN2005] J104405.8-593708 Cld 10 44 05.8 -59 37 08           ~ 2 0
10 MSX6C G287.4723-00.6270 MIR 10 44 11.8 -59 37 27           ~ 4 1
11 [CB95] 7 Cld 10 44 23 -59 42.2           ~ 2 0
12 NAME Carina Defiant Finger Cld 10 44 31.2 -59 39 56           ~ 9 0
13 [RBB2002] N4 mul 10 44 32.1 -59 33 20           ~ 8 0
14 [CB95] 5 Cld 10 44 42 -59 37.9           ~ 8 0
15 NAME Car II HII Region HII 10 44 47 -59 38.8           ~ 40 0
16 [CB95] C Cld 10 44 50.2 -59 40 43           ~ 6 0
17 [BGN2005] J104451.2-593803 Cld 10 44 51.2 -59 38 03           ~ 7 0
18 [BGN2005] J104458.5-593739 Cld 10 44 58.5 -59 37 39           ~ 7 0
19 [RBB2002] S reg 10 45 00 -59 47.1           ~ 1 0
20 MSX5C G287.6393-00.7209 MIR 10 45 01.1 -59 47 07           ~ 1 0
21 Cl Trumpler 16 OpC 10 45 01.9 -59 42 00           ~ 510 0
22 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
23 IRAS 10430-5931 HII 10 45 02.4 -59 47 10           ~ 16 0
24 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
25 [CB95] B Cld 10 45 07.0 -59 39 15           ~ 6 0
26 [BBR2000] U1 PoC 10 45 11 -59 37.7           ~ 2 0
27 * rho Cen Pu* 12 11 39.1197479712 -52 22 06.384420264 3.20 3.81 3.96 4.05 4.21 B3V 136 0
28 NGC 6334 HII 17 20 53 -36 07.9           ~ 740 0
29 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
30 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
31 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
32 [RBB2002] N2 IR ~ ~           ~ 2 0
33 [MCB96] 3 * ~ ~           ~ 2 0
34 [MCB96] 1 * ~ ~           ~ 2 0
35 [RBB2002] R3 IR ~ ~           ~ 1 0
36 [RBB2002] R2 IR ~ ~           ~ 1 0
37 [RBB2002] R1 IR ~ ~           ~ 1 0

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