2005A&A...429..945M


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET19:59:34

2005A&A...429..945M - Astronomy and Astrophysics, volume 429, 945-960 (2005/1-3)

Star-forming protoclusters associated with methanol masers.

MINIER V., BURTON M.G., HILL T., PESTALOZZI M.R., PURCELL C.R., GARAY G., WALSH A.J. and LONGMORE S.

Abstract (from CDS):

We present a multiwavelength study of five methanol maser sites which are not directly associated with a strong (>100mJy) radio continuum source: G31.28+0.06, G59.78+0.06, G173.49+2.42 (S231, S233IR), G188.95+0.89 (S252, AFGL5180) and G192.60-0.05 (S255IR). These radio-quiet methanol maser sites are often interpreted as precursors of ultra-compact HII regions or massive protostar sites. In this work, the environment of methanol masers is probed from mid-IR to millimetre wavelengths at angular resolutions of 8"-34". Spectral energy distribution (SED) diagrams for each site are presented, together with mass and luminosity estimates. Each radio-quiet maser site is always associated with a massive (>50M), deeply embedded (Av>40mag) and very luminous (>104L) molecular clump, with Ltotal∝Mgas0.75. These physical properties characterise massive star-forming clumps in earlier evolutionary phases than HII regions. In addition, colder gas clumps seen only at mm-wavelengths are also found near the methanol maser sites. These colder clumps may represent an even earlier phase of massive star formation. These results suggest an evolutionary sequence for massive star formation from a cold clump, seen only at mm wavelengths, evolving to a hot molecular core with a two-component SED with peaks at far-IR and mid-IR wavelengths, to an (ultra-compact) HII region. Alternatively, the cold clumps might be clusters of low-mass YSOs, in formation near the massive star-forming clusters. Finally, the values of the dust grain emissivity index (β) range between 1.6 and 1.9.

Abstract Copyright:

Journal keyword(s): masers - stars: formation - ISM: dust, extinction

Nomenclature: Table 1, Figs: [MBH2005] GLLL.ll+B.bb MM N N=3+2+4+2+3.

CDS comments: Fig.7: objects 'NN' not in SIMBAD.

Simbad objects: 49

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Number of rows : 49

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 330 0
2 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 969 3
3 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1497 1
4 SH 2-233 HII 05 38 31.5 +35 51 19           ~ 62 1
5 [MBH2005] G173.49+2.42 MM 3 cor 05 39 08.77 +35 46 42.9           ~ 3 0
6 NAME SH 2-233SE IR Cluster Cl* 05 39 10 +35 45.3           ~ 4 0
7 IRAS 05358+3543 mul 05 39 10.4 +35 45 19           ~ 137 1
8 NAME SH 2-233 IR Cl* 05 39 10.4 +35 45 19           ~ 93 0
9 [MBH2005] G173.49+2.42 MM 2 cor 05 39 10.85 +35 46 04.7           ~ 3 0
10 [MBH2005] G173.49+2.42 MM 4 cor 05 39 11.12 +35 45 18.2           ~ 3 0
11 SH 2-231 HII 05 39 12.9 +35 45 54           ~ 121 0
12 [MES2015] 1058 cor 05 39 13.0 +35 45 52           ~ 5 0
13 SH 2-235 B HII 05 40 52.366 +35 41 29.43   17       ~ 173 1
14 SH 2-235 HII 05 41.1 +35 50           ~ 192 0
15 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 692 1
16 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1206 0
17 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1084 1
18 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 663 2
19 LBN 189.02+00.91 HII 06 08 23 +21 35.3           ~ 65 0
20 LS V +21 27 V* 06 08 32.1165465652 +21 36 39.235693184 11.24 11.4 11.0 10.89   O9.5IV 26 0
21 [MBH2005] G188.95+0.89 MM 2 Cld 06 08 52.2 +21 38 13           ~ 4 0
22 [MBH2005] G188.95+0.89 MM 1 Cld 06 08 52.8 +21 38 37           ~ 7 0
23 RAFGL 5180 SFR 06 08 54.1 +21 38 25           ~ 110 0
24 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 249 3
25 SH 2-257 HII 06 12 44 +17 59.3           ~ 122 1
26 [MBH2005] G192.60-0.05 MM 1 Cld 06 12 52.9 +18 00 27           ~ 7 0
27 [MBH2005] G192.60-0.05 MM 2 Cld 06 12 53.4 +17 59 23           ~ 5 0
28 Caswell H2O 192.60-00.05 Mas 06 12 53.6 +17 59 27           ~ 7 0
29 NAME S255-2 IR 06 12 53.8 +17 59 22           ~ 39 0
30 NAME SH 2-255 IRS 1 Y*O 06 12 54.0060 +17 59 22.958           ~ 325 0
31 [MBH2005] G192.60-0.05 MM 3 Cld 06 12 56.8 +17 58 03           ~ 3 0
32 IC 2162 HII 06 13 04.1 +17 58 44           ~ 339 2
33 HD 147889 Y*O 16 25 24.3162969787 -24 27 56.570239619 8.56 8.73 7.90     B2III/IV 443 1
34 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 617 0
35 NAME rho Oph C Cloud MoC 16 26 53.1 -24 32 31           ~ 57 0
36 NAME rho Oph E MoC 16 27 02.0 -24 38 31           ~ 56 0
37 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3129 1
38 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 457 0
39 [MBH2005] G031.28+0.06 MM 3 Cld 18 48 10.0 -01 27 55           ~ 1 0
40 [MBH2005] G031.28+0.06 MM 2 Cld 18 48 10.8 -01 26 54           ~ 1 0
41 [KJB2003] G31.279+0.063 HII 18 48 11.94 -01 26 30.8           ~ 12 1
42 [MBH2005] G031.28+0.06 MM 1 Cld 18 48 12.1 -01 26 20           ~ 1 0
43 AGAL G031.281+00.062 cor 18 48 13 -01 26.5           ~ 51 0
44 [MBH2005] G059.78+0.06 MM 1 Cld 19 43 10.0 +23 44 59           ~ 1 0
45 MSX6C G059.7831+00.0648 Y*O 19 43 11.21664 +23 44 03.9696           ~ 130 0
46 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 143 0
47 IRAS 20126+4104 Y*O 20 14 25.8816186803 +41 13 36.869078243           B2.5-B0.5 403 0
48 Mol 160 Rad 23 40 54.5 +61 10 28           ~ 90 0
49 NAME rho Oph C-S PoC ~ ~           ~ 5 0

    Equat.    Gal    SGal    Ecl

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2021.02.24-19:59:34

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