2012ApJ...755..152R

Query : 2012ApJ...755..152R

2012ApJ...755..152R - Astrophys. J., 755, 152 (2012/August-3)

Compact radio sources in M17.

RODRIGUEZ L.F., GONZALEZ R.F., MONTES G., ASIRI H.M., RAGA A.C. and CANTO J.

Abstract (from CDS):

The classic H II region M17 is one of the best studied across the electromagnetic spectrum. We present sensitive, high angular resolution observations made with the Jansky Very Large Array at 4.96 and 8.46 GHz that reveal the presence of 38 compact radio sources, in addition to the well-known hypercompact cometary H II region M17 UC1. For this last source, we find that its spectral index of the order of ∼1 is due to a gradient in opacity across its face. Of the 38 compact radio sources detected, 19 have stellar counterparts detected in the infrared, optical, or X-rays. Finally, we discuss the nature of the radio emission from the massive binary system CEN 1a and CEN 1b, concluding that both are most probably non-thermal emitters, although the first is strongly time variable and the second is steady.

Abstract Copyright: ∼

Journal keyword(s): ISM: individual: M17 - radio continuum: stars - stars: individual (CEN 1a, CEN 1b)

Nomenclature: Table 3: [RGM2012] JVLA NN (Nos 1-38)

Simbad objects: 47

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Number of rows : 47
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 Ori A MoC 05 38 -07.1           ~ 3187 0
2 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
3 HD 168112 SB* 18 18 40.8671461608 -12 06 23.367244644 8.81 9.21 8.52 9.24   O5III(f) 156 0
4 [RGM2012] JVLA 1 Rad 18 20 13.335 -16 12 50.69           ~ 1 0
5 [RGM2012] JVLA 2 Rad 18 20 17.575 -16 12 21.52           ~ 1 0
6 [BFT2007] 123 Y*O 18 20 19.472 -16 13 29.89           ~ 6 0
7 SH 2-45 HII 18 20 21.2 -16 13 37           ~ 29 0
8 2MASS J18202143-1612068 Y*O 18 20 21.441 -16 12 06.79           ~ 4 0
9 Cl* NGC 6618 B 331 * 18 20 21.6385852800 -16 11 17.906098776           B0V 24 0
10 [RGM2012] JVLA 6 Rad 18 20 22.369 -16 12 04.95           ~ 1 0
11 NAME M 17 UC1 HII 18 20 24.82 -16 11 34.9           ~ 57 1
12 [RGM2012] JVLA 9 Rad 18 20 25.297 -16 11 39.83           ~ 1 0
13 [RGM2012] JVLA 7 Rad 18 20 25.317 -16 11 48.74           ~ 1 0
14 2MASS J18202550-1610537 Y*O 18 20 25.500 -16 10 53.77           B3 6 0
15 [RGM2012] JVLA 10 Rad 18 20 26.239 -16 11 15.85           ~ 1 0
16 [RGM2012] JVLA 11 Rad 18 20 26.745 -16 07 21.82           ~ 1 0
17 [RGM2012] JVLA 12 Rad 18 20 27.377 -16 11 38.59           ~ 1 0
18 2MASS J18202785-1609560 Y*O 18 20 27.8459389248 -16 09 56.096829936   14.00 13.04     G6 7 0
19 [RGM2012] JVLA 14 Rad 18 20 28.0765802376 -16 11 26.281660956           ~ 1 0
20 2MASS J18202826-1613179 Y*O 18 20 28.260 -16 13 17.91           ~ 3 0
21 Cl* NGC 6618 B 222 * 18 20 28.300 -16 11 31.19           ~ 3 0
22 [RGM2012] JVLA 17 Rad 18 20 28.384 -16 10 14.13           ~ 1 0
23 [RGM2012] JVLA 18 Rad 18 20 29.118 -16 08 58.61           ~ 1 0
24 CXOU J182029.4-161050 Y*O 18 20 29.4371093496 -16 10 50.110323816           ~ 4 0
25 NGC 6618 341B Y*O 18 20 29.8139340103 -16 10 45.551551314           O4V 14 0
26 [RGM2009] 2 Rad 18 20 29.84 -16 10 15.2           ~ 2 0
27 NGC 6618 341 ** 18 20 29.86200 -16 10 44.9328 17.04 16.566 13.922 13.026   O4+O4 63 0
28 NGC 6618 341A Y*O 18 20 29.8956868675 -16 10 44.417416801           O4V 15 0
29 CXOU J182030.0-161034 Y*O 18 20 30.024 -16 10 34.63           ~ 4 0
30 CXOU J182030.0-161039 Y*O 18 20 30.086 -16 10 39.80           ~ 3 0
31 [RGM2012] JVLA 24 Rad 18 20 30.323 -16 10 50.65           ~ 1 0
32 2MASS J18203034-1611436 Y*O 18 20 30.3417776088 -16 11 43.623789468           ~ 4 0
33 [RGM2012] JVLA 26 Rad 18 20 30.415 -16 11 03.63           ~ 1 0
34 2MASS J18203044-1610530 Y*O 18 20 30.4417713240 -16 10 53.061367908           ~ 23 0
35 2MASS J18203057-1611040 Y*O 18 20 30.578 -16 11 04.10           ~ 8 0
36 2MASS J18203064-1610282 Y*O 18 20 30.632 -16 10 28.48           ~ 4 0
37 [RGM2012] JVLA 30 Rad 18 20 30.777 -16 10 59.35           ~ 1 0
38 Cl* NGC 6618 B 159 Y*O 18 20 31.1122691016 -16 09 29.833437852           ~ 11 0
39 2MASS J18203152-1610326 Y*O 18 20 31.525 -16 10 32.44           ~ 3 0
40 [RGM2012] JVLA 33 Rad 18 20 32.981 -16 11 15.55           ~ 1 0
41 2MASS J18203306-1611215 Y*O 18 20 33.061 -16 11 21.56           ~ 22 0
42 [RGM2012] JVLA 35 Rad 18 20 33.090 -16 09 40.85           ~ 2 0
43 [RGM2012] JVLA 36 Rad 18 20 33.504 -16 10 44.57           ~ 1 0
44 [RGM2012] JVLA 37 Rad 18 20 33.609 -16 10 21.66           ~ 1 0
45 [RGM2012] JVLA 38 Rad 18 20 33.767 -16 10 46.39           ~ 1 0
46 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
47 PMN J1832-1035 rG 18 32 20.83647 -10 35 11.1968           ~ 107 1

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