2002A&A...390..337K

Query : 2002A&A...390..337K

2002A&A...390..337K - Astronomy and Astrophysics, volume 390337-350 (2002/7-4)

Expanding shells of shocked neutral hydrogen around compact HII regions.

KOTHES R. and KERTON C.R.

Abstract (from CDS):

By comparing radial velocities of radio bright compact HII regions with their HI absorption profiles, we discovered expanding shells of neutral hydrogen around them. These shells are revealed by absorption of the radio continuum emission from the HII regions at velocities indicating greater distances than the observed radial velocity. We believe that these shells are shock zones at the outer edge of the expanding ionized region. Additionally we found evidence for a velocity inversion inside the Perseus arm caused by a spiral shock, which results in a deep absorption line in the spectra of compact HII regions behind it.

Abstract Copyright: ∼

Journal keyword(s): ISM: circumstellar matter - ISM: HII regions - ISM: kinematics, dynamics

CDS comments: In reflist, Wouterloot, A&AS : 1993 is a misprint for 1989 (1989A&AS.80.149W).

Simbad objects: 28

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Number of rows : 28
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 IRAS 02044+6031 Y*O 02 08 05.0355540072 +60 46 00.603102324           ~ 70 1
2 SH 2-201 HII 03 03 17.9 +60 27 52           ~ 118 0
3 Kiso C5-48 C* 03 07 11.9630774208 +62 41 13.714180224     15.4     C 11 0
4 NAME GGD 12-15 OpC 06 10 48.0 -06 13 15           ~ 159 1
5 SH 2-105 HII 20 21 38.2 +37 31 11           ~ 21 0
6 [KC97c] G075.8+00.3 HII 20 21 41.0 +37 25 56           ~ 8 0
7 IRAS 20220+3728 Y*O 20 23 55.22 +37 38 12.3           ~ 50 3
8 [KC97c] G076.2-00.3 HII 20 25 22.5 +37 23 21           ~ 4 0
9 [KC97c] G080.3+00.7 HII 20 33 55.3 +41 22 21           ~ 4 0
10 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
11 IRAS Z20376+4109 Y*O 20 39 25.8 +41 20 02           ~ 25 1
12 GAL 084.0+00.8 HII 20 45 37.3 +44 15 29           ~ 4 0
13 IRAS 20446+4613 HII 20 46 17.2989881976 +46 24 35.183688840           ~ 20 1
14 [ABB2014] WISE G085.241+00.021 HII 20 53 36.8 +44 46 25           ~ 6 0
15 SH 2-121 HII 21 05 16 +49 39.9           ~ 31 0
16 IRAS 21078+5211 HII 21 09 31.03 +52 24 16.1           ~ 65 0
17 IRAS 21202+5157 HII 21 21 53.577 +52 10 47.30           ~ 26 0
18 LBN 096.23+02.55 HII 21 28 42 +54 37.0           ~ 54 0
19 SH 2-128 HII 21 32 09.9 +55 52 53           ~ 173 1
20 SH 2-138 HII 22 32 45.7 +58 28 20           ~ 115 2
21 BG 2247+59 LP? 22 49 29.0034646608 +59 54 56.182749876           ~ 111 1
22 SH 2-149 HII 22 56 16.90 +58 31 22.8           ~ 61 1
23 SH 2-152 HII 22 58 40.8107767416 +58 46 59.226036024           ~ 147 1
24 IC 1470 HII 23 05 09.9 +60 14 31   11.5       ~ 180 2
25 SH 2-159 Y*O 23 15 31.2384366062 +61 07 10.181362705           ~ 188 1
26 NGC 7635 HII 23 20 48.3 +61 12 06           ~ 179 2
27 IRAS 23365+5953 FIR 23 38 55.5 +60 09 53           ~ 3 0
28 LBN 115.71-01.61 HII 23 52 56.5 +60 29 04           ~ 41 0

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