2008ApJ...683..189H

Query : 2008ApJ...683..189H

2008ApJ...683..189H - Astrophys. J., 683, 189-206 (2008/August-2)

A survey of hydroxyl toward supernova remnants: evidence for extended 1720 MHz maser emission.

HEWITT J.W., YUSEF-ZADEH F. and WARDLE M.

Abstract (from CDS):

We present the results of GBT observations of all four ground-state hydroxyl (OH) transitions toward 15 supernova remnants (SNRs) which show OH (1720 MHz) maser emission. This species of maser is well established as an excellent tracer of an ongoing interaction between the SNR and dense molecular material. For the majority of these objects we detect significantly higher flux densities with a single dish than have been reported with interferometric observations. We infer that spatially extended, low-level maser emission is a common phenomenon that traces the large-scale interaction in maser-emitting SNRs. In addition, we use a collisional pumping model to fit the physical conditions under which OH is excited behind the SNR shock front. We find the observed OH gas associated with the SNR interaction having columns NOH≤1.5x1017/cm2, temperatures of 20-125 K, and densities ∼105/cm3.

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Journal keyword(s): ISM: Clouds - Masers - Radio Lines: ISM - Shock Waves - ISM: Supernova Remnants

Simbad objects: 41

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Number of rows : 41
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 LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
2 SNR J052559-660453 SNR 05 26 00.4 -66 05 02     12.71     ~ 456 2
3 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1314 1
4 SNR G348.5+00.1 SNR 17 14 31.780 -38 28 34.50           ~ 233 3
5 IRAS 17111-3824 FIR 17 14 35.3 -38 28 23           ~ 4 0
6 SNR G348.5-00.0 Rad 17 15 26 -38 28.0           ~ 39 1
7 SNR G349.7+00.2 SNR 17 18 10.160 -37 18 53.80           ~ 196 0
8 NAME the Square Nebula Rad 17 38.6 -30 44           ~ 52 1
9 IRAS 17368-3057 HII 17 40 05.69664 -30 58 56.4060           ~ 13 1
10 OH 357.68-00.06 OH* 17 40 12.69264 -30 56 43.1304           O-rich 11 1
11 NAME Tornado Nebula SNR 17 40 16.360 -30 58 18.87           ~ 148 0
12 SNR G359.1-00.5 SNR 17 45 30 -29 57.0           ~ 179 1
13 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
14 NAME Sgr A East SNR 17 45 41 -29 00.8           ~ 523 2
15 SNR G001.0-00.1 SNR 17 48.5 -28 09           ~ 29 0
16 NAME Sgr D SNR SNR 17 48.7 -28 07           ~ 17 0
17 SNR G001.4-00.1 SNR 17 49 28.1 -27 47 45           ~ 38 0
18 SNR G006.4-00.1 SNR 18 00 31.2011719 -23 25 48.001099           ~ 782 1
19 [CFG97b] W28 OH A Mas 18 00 49.924 -23 20 26.66           ~ 6 0
20 [CFG97b] W28 OH E Mas 18 01 -23.3           ~ 6 0
21 [CFG97b] W28 OH B Mas 18 01 -23.3           ~ 5 0
22 [CFG97b] W28 OH C Mas 18 01 44.041 -23 24 23.05           ~ 6 0
23 [CFG97b] W28 OH F Mas 18 01 50.002 -23 18 46.58           ~ 8 0
24 [CFG97b] W28 OH D Mas 18 11 41.444 -23 25 05.26           ~ 6 0
25 SNR G016.7+00.8 SNR 18 20 57.0 -14 19 35           ~ 68 2
26 [KC97c] G021.9-00.4 HII 18 32 26.8 -09 58 26           ~ 6 0
27 SNR G021.8-00.6 SNR 18 32 45 -10 08.0           ~ 137 0
28 SNR G027.3+00.0 SNR 18 41 17.8 -04 56 12           ~ 345 3
29 GAL 028.17+00.05 HI 18 42.6 -04 13           ~ 3 0
30 SNR G031.9+00.0 SNR 18 49 16.3 -00 55 01           ~ 368 2
31 [CFG97b] W44 OH A Mas 18 55 27 +01 33.7           ~ 4 0
32 [CFG97b] W44 OH B Mas 18 56 01.2 +01 12 27           ~ 4 0
33 [CFG97b] W44 OH C Mas 18 56 03.7 +01 08 44           ~ 4 0
34 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 1034 2
35 [CFG97b] W44 OH E Mas 18 56 29.1 +01 29 44           ~ 7 0
36 [CFG97b] W44 OH D Mas 18 56 29.4 +01 20 26           ~ 5 0
37 [CFG97b] W44 OH F Mas 18 56 36.9 +01 26 35           ~ 6 0
38 SNR G049.1-00.1 SNR 19 23 19.300 +14 09 21.00           ~ 309 0
39 W 51a HII 19 23 29.3 +14 31 38           ~ 186 0
40 W 51b SFR 19 23 32.8 +14 29 56           ~ 89 0
41 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1

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