2011A&A...535A..76N

Query : 2011A&A...535A..76N

2011A&A...535A..76N - Astronomy and Astrophysics, volume 535A, 76-76 (2011/11-1)

The Herschel view of massive star formation in G035.39-00.33: dense and cold filament of W48 undergoing a mini-starburst.

NGUYEN LUONG Q., MOTTE F., HENNEMANN M., HILL T., RYGL K.L.J., SCHNEIDER N., BONTEMPS S., MEN'SHCHIKOV A., ANDRE P., PERETTO N., ANDERSON L.D., ARZOUMANIAN D., DEHARVENG L., DIDELON P., DI FRANCESCO J., GRIFFIN M.J., KIRK J.M., KOENYVES V., MARTIN P.G., MAURY A., MINIER V., MOLINARI S., PESTALOZZI M., PEZZUTO S., REID M., ROUSSEL H., SAUVAGE M., SCHULLER F., TESTI L., WARD-THOMPSON D., WHITE G.J. and ZAVAGNO A.

Abstract (from CDS):

The filament IRDC G035.39-00.33 in the W48 molecular complex is one of the darkest infrared clouds observed by Spitzer. It has been observed by the PACS (70 and 160µm) and SPIRE (250, 350, and 500µm) cameras of the Herschel Space Observatory as part of the W48 molecular cloud complex in the framework of the HOBYS key programme. The observations reveal a sample of 28 compact sources (deconvolved FWHM sizes <0.3pc) complete down to ∼5M☉ in G035.39-00.33 and its surroundings. Among them, 13 compact sources are massive dense cores with masses >20M☉. The cloud characteristics we derive from the analysis of their spectral energy distributions are masses of 20-50M☉, sizes of 0.1-0.2pc, and average densities of 2-20x105cm–3, which make these massive dense cores excellent candidates to form intermediate- to high-mass stars. Most of the massive dense cores are located inside the G035.39-00.33 ridge and host IR-quiet high-mass protostars. The large number of protostars found in this filament suggests that we are witnessing a mini-burst of star formation with an efficiency of ∼15% and a rate density of ∼40M☉/yr/kpc2 within ∼8pc2, a large area covering the full ridge. Part of the extended SiO emission observed towards G035.39-00.33 is not associated with obvious protostars and may originate from low-velocity shocks within converging flows, as advocated by previous studies.

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Journal keyword(s): ISM: clouds - stars: formation - submillimeter: ISM - stars: protostars - ISM: individual objects: G035.39-00.33 - ISM: individual objects: W48

Nomenclature: Fig. 2, Table 1: [NMH2011] NN (Nos 1-28).

Simbad objects: 36

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Number of rows : 36
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 Per Region reg 03 37 00.0 +31 15 00           ~ 271 0
2 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3629 1
3 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 531 0
4 [NMH2011] 24 cor 18 56 40.6 +02 00 33           ~ 1 0
5 [NMH2011] 3 cor 18 56 40.9 +02 09 55           ~ 1 0
6 [NMH2011] 26 cor 18 56 41.0 +02 13 22           ~ 1 0
7 [NMH2011] 13 cor 18 56 41.4 +02 14 30           ~ 1 0
8 [NMH2011] 4 cor 18 56 45.5 +02 06 18           ~ 1 0
9 [NMH2011] 14 cor 18 56 54.5 +02 03 24           ~ 1 0
10 [NMH2011] 8 cor 18 56 57.0 +02 05 11           ~ 1 0
11 [NMH2011] 1 cor 18 56 59.0 +02 04 53           ~ 1 0
12 [NMH2011] 9 cor 18 56 59.7 +02 07 13           ~ 2 0
13 [NMH2011] 25 cor 18 57 03.3 +02 06 50           ~ 1 0
14 AGAL G035.452-00.296 Y*O 18 57 05.178 +02 06 30.26           ~ 24 0
15 [NMH2011] 21 cor 18 57 06.0 +02 12 31           ~ 2 0
16 [NMH2011] 22 cor 18 57 06.5 +02 08 31           ~ 2 0
17 [NMH2011] 10 cor 18 57 07.2 +02 08 21           ~ 2 0
18 [NMH2011] 12 cor 18 57 07.9 +02 09 38           ~ 2 0
19 CXOU J185707.9+021037 Y*O 18 57 07.93824 +02 10 38.6184           ~ 5 0
20 [NMH2011] 28 cor 18 57 08.1 +02 11 06           ~ 2 0
21 [NMH2011] 17 cor 18 57 08.3 +02 09 04           ~ 2 0
22 [NMH2011] 6 cor 18 57 08.4 +02 10 53           ~ 3 0
23 [NMH2011] 16 cor 18 57 08.5 +02 08 05           ~ 2 0
24 MSXDC G035.39-0.33 MoC 18 57 09.0 +02 07 46           ~ 115 0
25 [NMH2011] 11 cor 18 57 09.1 +02 08 26           ~ 2 0
26 [NMH2011] 23 cor 18 57 09.2 +02 11 03           ~ 1 0
27 [NMH2011] 7 cor 18 57 09.3 +02 07 51           ~ 3 0
28 [NMH2011] 20 cor 18 57 09.4 +02 09 35           ~ 2 0
29 [NMH2011] 5 cor 18 57 09.4 +02 10 41           ~ 2 0
30 [NMH2011] 27 cor 18 57 09.8 +02 10 13           ~ 1 0
31 2MASS J18572300+0206415 Y*O 18 57 23.010 +02 06 41.52           ~ 3 0
32 [NMH2011] 15 cor 18 57 24.1 +02 06 21           ~ 1 0
33 SNR G035.2-01.8 SNR 19 01.6 +01 14           ~ 153 0
34 NAME Cyg X BL? 20 30 04.7973633 +40 51 36.002197           ~ 843 1
35 NAME LDN 1157-mm Y*O 20 39 06.2 +68 02 15           ~ 189 0
36 NAME Gould Belt PoG ~ ~           ~ 873 1

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