2007A&A...466.1065B


Query : 2007A&A...466.1065B

2007A&A...466.1065B - Astronomy and Astrophysics, volume 466, 1065-1076 (2007/5-2)

Interferometric multi-wavelength (sub)millimeter continuum study of the young high-mass protocluster IRAS 05358+3543.

BEUTHER H., LEURINI S., SCHILKE P., WYROWSKI F., MENTEN K.M. and ZHANG Q.

Abstract (from CDS):

We study the small-scale structure of massive star-forming regions through interferometric observations in several (sub)mm wavelength bands. These observations resolve multiple sources, yield mass and column density estimates, and give information about the density profiles as well as the dust and temperature properties. We observed the young massive star-forming region IRAS 05358+3543 at high spatial resolution in the continuum emission at 3.1 and 1.2mm with the Plateau de Bure Interferometer, and at 875 and 438µm with the Submillimeter Array. The observations are accompanied by VLA 3.6cm archival continuum data. We resolve at least four continuum sub-sources that are likely of protostellar nature. Two of them are potentially part of a proto-binary system with a projected separation of 1700AU. Additional (sub)mm continuum peaks are not necessarily harboring protostars but maybe caused by the multiple molecular outflows. The spectral energy distributions (SEDs) of the sub-sources show several features. The main power house mm1, which is associated with CH3OH maser emission, a hypercompact HII region and a mid-infrared source, exhibits a typical SED with a free-free emission component at cm and long mm wavelengths and a cold dust component in the (sub)mm part of the spectrum (spectral index between 1.2mm and 438µm α∼3.6). The free-free emission corresponds to a Lyman continuum flux of an embedded 13M B1 star. The coldest source of the region, mm3, has α∼3.7 between 1.2mm and 875µm, but has lower than expected fluxes in the shorter wavelength 438µm band. This turnover of the Planck-function sets an upper limit on the dust temperature of mm3 of approximately 20K. The uv-data analysis of the density structure of individual sub-cores reveals distributions with power-law indices between 1.5 and 2. This resembles the density distributions of the larger-scale cluster-forming clump as well as those from typical low-mass cores.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: early-type - stars: individual: IRAS 05358+3543 - ISM: dust, extinction - ISM: jets and outflows

VizieR on-line data: <Available at CDS (J/A+A/466/1065): list.dat figs/*>

Nomenclature: Fig.2, Table 2: [BSG2002] mmNa (Nos mm1a, mm1b, mm2a to mm2d).

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 - 2024
#notes
1 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 355 0
2 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1024 2
3 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1032 3
4 W 3(H2O) Mas 02 27 04.6 +61 52 25           ~ 145 0
5 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4003 3
6 6C 035545+504923 Bla 03 59 29.74727351 +50 57 50.1618607           ~ 445 1
7 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 949 1
8 QSO B0420-0127 QSO 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1207 3
9 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 958 1
10 6C 052928+482031 QSO 05 33 15.86579115 +48 22 52.8077787     19.90     ~ 128 1
11 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2329 0
12 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2291 1
13 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 578 0
14 IRAS 05358+3543 Y*O 05 39 09.92 +35 45 17.2           ~ 163 0
15 [BSG2002] mm3 mm 05 39 12.49 +35 45 55.2           ~ 20 0
16 [BSG2002] mm2a mm 05 39 12.76 +35 45 51.3           ~ 1 0
17 [BSG2002] mm2 mm 05 39 12.78 +35 45 50.6           ~ 3 0
18 [BSG2002] mm2b mm 05 39 12.81 +35 45 50.7           ~ 1 0
19 [BSG2002] mm2c mm 05 39 12.92 +35 45 49.3           ~ 1 0
20 NAME IRAS 05358+3543 mm mm 05 39 13.0 +35 45 54           ~ 4 0
21 [BSG2002] mm2d mm 05 39 13.03 +35 45 48.9           ~ 1 0
22 [BSG2002] mm1 mm 05 39 13.08 +35 45 50.5           ~ 15 0
23 [BSG2002] mm1a mm 05 39 13.08 +35 45 51.3           ~ 2 0
24 [BSG2002] mm1b mm 05 39 13.13 +35 45 50.8           ~ 2 0
25 7C 055201.39+394824.00 Bla 05 55 30.80561419 +39 48 49.1649683     18.30 17.5   ~ 504 2
26 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1891 1
27 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5797 1
28 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3040 2
29 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4337 2
30 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14383 0
31 IRAS 20293+3952 HII 20 31 11.040 +40 03 10.69           ~ 75 0
32 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 571 0

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