2003ApJ...598.1127D

Query : 2003ApJ...598.1127D

2003ApJ...598.1127D - Astrophys. J., 598, 1127-1139 (2003/December-1)

A search for mid-infrared emission from hot molecular core candidates.

DE BUIZER J.M., RADOMSKI J.T., TELESCO C.M. and PINA R.K.

Abstract (from CDS):

We present here mid-infrared images of seven sites of water maser emission thought to be associated with the hot molecular core (HMC) phase of massive star formation. We have detected mid-infrared emission from the locations of two of these HMC candidates, G11.94-0.62 and G45.07+0.13. From our observations we derived lower limit estimates of the luminosities for the exciting sources in these two HMC candidates. We find that the estimates are consistent with the hypothesis that the HMCs are internally heated by massive B- and O-type stars. We observed two sites with HMCs previously claimed to be detected in the mid-infrared, G19.61-0.23 and G34.26+0.15; however, we did not detect mid-infrared emission from either HMC location. We place new upper limits on the mid-infrared flux densities for these HMCs that are much lower than their previously reported flux densities. We were also able to obtain extremely accurate astrometry for our mid-infrared observations of G9.62+0.19 and conclude that the mid-infrared emission previously thought to be coming from the HMC in this field is in fact coming from a different source altogether.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - Infrared: ISM - Masers - stars: early type - Stars: Formation

Nomenclature: Table 2: [DRT2003] GLL.ll+B.bb N N=30.

Simbad objects: 59

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Number of rows : 59
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 W 3(H2O) Mas 02 27 04.6 +61 52 25           ~ 154 0
2 [GRM93] G09.61+0.20 A Rad 18 06 11.9 -20 31 41           ~ 15 0
3 DRT03 G09.62+0.19 1 IR 18 06 13.4330 -20 31 28.000           ~ 2 0
4 DRT03 G09.62+0.19 2 IR 18 06 13.8530 -20 31 26.500           ~ 2 0
5 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 226 0
6 [GRM93] G09.61+0.20 B Rad 18 06 14.1 -20 31 43           ~ 19 0
7 DRT03 G09.62+0.19 3 IR 18 06 14.2470 -20 31 46.100           ~ 2 0
8 DRT03 G09.62+0.19 4 IR 18 06 14.3670 -20 31 25.800           ~ 2 0
9 [GRM93] G09.61+0.20 C HII 18 06 14.4 -20 31 25           ~ 19 0
10 DRT03 G09.62+0.19 5 IR 18 06 14.4730 -20 31 31.400           ~ 2 0
11 DRT03 G09.62+0.19 6 IR 18 06 14.6470 -20 31 31.800           ~ 2 0
12 [GRM93] G09.61+0.20 E HII 18 06 14.7 -20 31 32           ~ 51 0
13 DRT03 G09.62+0.19 7 IR 18 06 14.7000 -20 31 25.100           ~ 2 0
14 [HC96] G09.62+0.19 7 Mas 18 06 14.883 -20 31 38.36           ~ 3 0
15 [GRM93] G09.61+0.20 F Rad 18 06 14.89 -20 31 38.9           ~ 29 1
16 [GRM93] G09.61+0.20 D HII 18 06 14.9 -20 31 43           ~ 20 0
17 DPT00 G009.619+0.193 1 IR 18 06 14.9270 -20 31 40.900           ~ 2 0
18 DRT03 G09.62+0.19 9 IR 18 06 15.0930 -20 31 50.600           ~ 2 0
19 IRAS 18097-1825A cor 18 12 39.72 -18 24 20.5           ~ 69 0
20 [HC96] G12.21-0.10 2 Mas 18 12 39.762 -18 24 17.74           ~ 2 0
21 DRT03 G11.94-0.62 1 IR 18 14 00.29 -18 53 23.1           ~ 3 0
22 DRT03 G45.07+0.13 1 IR 18 14 00.29 -18 53 23.1           ~ 3 0
23 [HC96] G11.94-0.62 3 Mas 18 14 00.324 -18 53 23.61           ~ 3 0
24 DRT03 G11.94-0.62 2 IR 18 14 00.8430 -18 53 22.800           ~ 3 0
25 DRT03 G11.94-0.62 3 IR 18 14 00.9900 -18 53 18.600           ~ 3 0
26 CORNISH G011.9368-00.6158 HII 18 14 01.0 -18 53 23           ~ 88 1
27 DRT03 G11.94-0.62 4 IR 18 14 01.0100 -18 53 25.900           ~ 3 0
28 DRT03 G11.94-0.62 5 IR 18 14 01.0500 -18 53 23.500           ~ 3 0
29 DRT03 G11.94-0.62 6 IR 18 14 01.4230 -18 53 26.900           ~ 3 0
30 DRT03 G11.94-0.62 7 IR 18 14 01.4500 -18 53 30.800           ~ 2 0
31 DRT03 G19.61-0.23 1 IR 18 27 37.0800 -11 56 28.100           ~ 2 0
32 DRT03 G19.61-0.23 2 HII 18 27 37.340 -11 56 32.39           ~ 8 0
33 [HC96] G19.61-0.23 6 Mas 18 27 37.891 -11 56 37.06           ~ 3 0
34 GAL 019.61-00.23 HII 18 27 38.0 -11 56 42           ~ 162 0
35 [FCT2005] C HII 18 27 38.011 -11 56 34.92           ~ 5 0
36 DRT03 G19.61-0.23 3 HII 18 27 38.14 -11 56 39.7           ~ 7 0
37 DRT03 G19.61-0.23 4 HII 18 27 38.20 -11 56 31.4           ~ 5 1
38 DRT03 G19.61-0.23 5 HII 18 27 38.79 -11 56 44.7           ~ 4 0
39 DRT03 G19.61-0.23 6 IR 18 27 38.9600 -11 56 42.700           ~ 2 0
40 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
41 CORNISH G029.9559-00.0168 Y*O 18 46 04.18 -02 39 21.3           ~ 385 0
42 [RH85] E Rad 18 53 18.4 +01 14 56           ~ 4 0
43 [RH85] C Rad 18 53 18.4 +01 14 58           ~ 14 0
44 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 537 0
45 [RH85] A HII 18 53 18.66 +01 15 00.4           ~ 18 0
46 [HC96] G34.26+0.15 2 Mas 18 53 18.682 +01 14 58.14           ~ 3 0
47 [RH85] B HII 18 53 18.72 +01 14 56.1           ~ 24 0
48 DRT03 G34.26+0.15 5 IR 18 53 18.7270 +01 15 56.700           ~ 2 0
49 DRT03 G45.07+0.13 2 IR 19 13 22.0100 +10 50 51.600           ~ 3 0
50 IRAS 19110+1045 Y*O 19 13 22.0427 +10 50 53.336           ~ 132 0
51 [HC96] G45.07+0.13 2 Mas 19 13 22.066 +10 50 55.55           ~ 2 0
52 DRT03 G45.07+0.13 3 IR 19 13 22.07 +10 50 55.4           ~ 3 0
53 OH 075.8+00.3 HII 20 21 43.8 +37 26 39           ~ 95 2
54 [HC96] G75.78-0.34 1 Mas 20 21 43.976 +37 26 37.98           ~ 11 1
55 GAL 075.78+00.34 cor 20 21 44.00 +37 26 38.0           ~ 131 1
56 DRT03 G34.26+0.15 4 IR ~ ~           ~ 1 0
57 DRT03 G34.26+0.15 3 IR ~ ~           ~ 1 0
58 DRT03 G34.26+0.15 1 IR ~ ~           ~ 1 0
59 DRT03 G34.26+0.15 2 IR ~ ~           ~ 1 0

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