2001AJ....122.3155H

Query : 2001AJ....122.3155H

2001AJ....122.3155H - Astron. J., 122, 3155-3170 (2001/December-0)

A peculiar intermediate-velocity hydrogen cloud near the galactic plane.

HIGGS L.A., KERTON C.R. and KNEE L.B.G.

Abstract (from CDS):

An H I cloud with a double-lobed structure and a radial velocity of +50 km.s–1 has been found near l=92°, b=-4° in a low-resolution H I survey carried out at the Dominion Radio Astrophysical Observatory (DRAO). This velocity is forbidden for circular Galactic rotation. Because of its unusual morphology and small variation in radial velocity over the cloud, further observations of the area were made with the DRAO Synthesis Telescope, both in the H I line and in the radio continuum. The cloud has dimensions of about 3°.3x0°.5, and has a morphology somewhat similar to high-velocity H I clouds (HVCs). Several possible associations with other objects are examined in this paper. A variable inverted-spectrum radio continuum source exists near the morphological center of the H I cloud. It is probably a rare example of a gigahertz peaked spectrum (GPS) extragalactic source having a peak above 5 GHz. A luminous B star is found close to the peculiar H I cloud, and the cloud is also located near the center of an H I supershell, supposedly located at a distance of about 9 kpc. Energetic and other considerations lead to the conclusion that the cloud is probably not related to the HVC phenomenon nor to any of the above objects but is a relic of a nearby (D∼1 kpc) supernova event, all other evidence of which has now dissipated. Maps of continuum radio emission (at 1420 and 408 MHz) in the area around the cloud are presented, as well as lists of continuum radio sources. A few isolated high-velocity knots of H I emission have also been detected in the vicinity of the cloud.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Kinematics and Dynamics - ISM: H I - Radio Continuum - Radio Emission Lines

VizieR on-line data: <Available at CDS (J/AJ/122/3155): table3.dat table4.dat table5.dat>

Nomenclature: [HKK2001] HI Cloud N=1. Table 3: [HKK2001] Knot NN (Nos 1-10). Table 4: 71P NNN (Nos 1-106). Table 5: 72P NN (Nos 1-56).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 112

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Number of rows : 112
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 71P 4 Rad 21 24 17.6 +47 28 50           ~ 1 0
2 71P 15 Rad 21 24 57.9 +47 48 11           ~ 1 0
3 71P 2 Rad 21 25 20.0 +47 08 06           ~ 1 0
4 NVSS J212540+465757 Rad 21 25 40.80 +46 57 56.8           ~ 3 1
5 71P 11 Rad 21 26 39.2 +47 27 40           ~ 1 0
6 NVSS J212641+471947 Rad 21 26 41.2 +47 19 48           ~ 2 1
7 71P 31 Rad 21 27 01.5 +48 12 07           ~ 1 0
8 71P 19 Rad 21 27 03.0 +47 38 35           ~ 1 0
9 71P 22 Rad 21 27 18.1 +47 45 26           ~ 1 0
10 71P 14 Rad 21 27 23.7 +47 22 36           ~ 1 1
11 72P 9 Rad 21 27 23.9 +47 22 18           ~ 1 1
12 71P 13 Rad 21 27 27.1 +47 21 26           ~ 1 1
13 71P 3 Rad 21 27 27.6 +46 45 52           ~ 1 0
14 71P 6 Rad 21 27 38.7 +46 54 47           ~ 1 0
15 NVSS J212747+472026 Rad 21 27 47.6 +47 20 25           ~ 2 1
16 71P 12 Rad 21 27 51.6 +47 15 13           ~ 1 0
17 71P 5 Rad 21 28 01.4 +46 50 33           ~ 1 0
18 71P 36 Rad 21 28 04.4 +48 08 54           ~ 1 0
19 71P 17 Rad 21 28 35.0 +47 17 10           ~ 1 0
20 71P 38 Rad 21 28 36.0 +48 08 29           ~ 1 0
21 NVSS J212849+482053 Rad 21 28 49.4 +48 20 52           ~ 2 0
22 71P 8 Rad 21 29 08.7 +46 53 17           ~ 1 0
23 71P 7 Rad 21 29 47.7 +46 43 00           ~ 1 0
24 71P 10 Rad 21 30 59.3 +46 36 31           ~ 1 0
25 71P 53 Rad 21 30 59.3 +48 03 44           ~ 1 0
26 71P 61 Rad 21 30 59.8 +48 14 25           ~ 1 0
27 71P 45 Rad 21 30 59.9 +47 52 57           ~ 1 0
28 NVSS J213121+465647 Rad 21 31 21.9 +46 56 46           ~ 2 1
29 NVSS J213136+482651 Rad 21 31 36.5 +48 26 53           ~ 2 0
30 71P 33 Rad 21 31 52.1 +47 23 14           ~ 1 0
31 NVSS J213218+465433 Rad 21 32 18.0 +46 54 33           ~ 2 1
32 71P 39 Rad 21 32 27.8 +47 27 22           ~ 1 0
33 71P 18 Rad 21 32 30.6 +46 37 51           ~ 1 0
34 71P 28 Rad 21 32 42.7 +47 02 02           ~ 1 0
35 71P 21 Rad 21 32 47.8 +46 41 12           ~ 1 0
36 71P 25 Rad 21 33 01.7 +46 52 10           ~ 1 0
37 71P 29 Rad 21 33 19.5 +46 57 00           ~ 1 0
38 71P 41 Rad 21 33 23.9 +47 20 14           ~ 1 1
39 72P 28 Rad 21 33 26.2 +47 20 54           ~ 1 1
40 71P 42 Rad 21 33 29.5 +47 20 14           ~ 1 1
41 NVSS J213334+474554 Rad 21 33 34.2 +47 45 53           ~ 2 0
42 71P 79 Rad 21 33 34.6 +48 15 38           ~ 1 0
43 2MASX J21333640+4747326 IR 21 33 36.4436688456 +47 47 32.492951808           ~ 1 0
44 71P 34 Rad 21 33 38.4 +47 06 12           ~ 1 0
45 71P 24 Rad 21 33 48.0 +46 42 59           ~ 1 0
46 NVSS J213355+474319 Rad 21 33 55.1 +47 43 21           ~ 2 0
47 71P 43 Rad 21 33 55.8 +47 16 54           ~ 1 0
48 71P 66 Rad 21 33 59.0 +47 48 25           ~ 1 0
49 71P 74 Rad 21 33 59.3 +48 03 10           ~ 1 1
50 72P 42 Rad 21 34 00.9 +48 03 39           ~ 1 1
51 71P 75 Rad 21 34 04.3 +48 04 04           ~ 1 1
52 71P 64 Rad 21 34 09.6 +47 41 49           ~ 1 0
53 71P 27 Rad 21 34 29.7 +46 41 36           ~ 1 0
54 71P 68 Rad 21 34 35.4 +47 49 33           ~ 1 0
55 71P 56 Rad 21 34 55.1 +47 26 02           ~ 1 0
56 71P 81 Rad 21 35 26.4 +47 56 20           ~ 1 0
57 71P 37 Rad 21 35 31.2 +46 48 53           ~ 1 0
58 NVSS J213536+471007 Rad 21 35 36.2 +47 10 10           ~ 2 1
59 71P 71 Rad 21 35 38.4 +47 42 03           ~ 1 0
60 72P 31 Rad 21 35 48.6 +47 10 10           ~ 1 1
61 71P 52 Rad 21 35 51.1 +47 10 22           ~ 2 1
62 71P 26 Rad 21 36 13.9 +46 20 13           ~ 1 0
63 71P 35 Rad 21 36 22.2 +46 37 31           ~ 1 0
64 71P 30 Rad 21 36 37.9 +46 22 23           ~ 1 0
65 [HKK2001] HI Cloud Cld 21 37 +47.0           ~ 1 0
66 71P 54 Rad 21 37 01.1 +46 59 36           ~ 1 0
67 71P 40 Rad 21 37 04.6 +46 38 54           ~ 1 0
68 71P 32 Rad 21 37 28.2 +46 18 48           ~ 1 0
69 71P 78 Rad 21 37 38.9 +47 28 39           ~ 1 0
70 71P 49 Rad 21 37 46.2 +46 43 32           ~ 1 0
71 71P 83 Rad 21 37 56.8 +47 38 20           ~ 1 0
72 NVSS J213823+462654 Rad 21 38 23.4 +46 26 53           ~ 2 0
73 71P 57 Rad 21 38 39.1 +46 45 09           ~ 1 0
74 71P 84 Rad 21 38 43.2 +47 31 13           ~ 1 0
75 NVSS J213846+471202 Rad 21 38 46.6 +47 12 03           ~ 2 1
76 71P 55 Rad 21 38 49.4 +46 40 30           ~ 1 0
77 71P 82 Rad 21 38 58.7 +47 25 52           ~ 1 0
78 71P 59 Rad 21 39 08.2 +46 43 02           ~ 1 0
79 71P 94 Rad 21 39 54.1 +47 56 33           ~ 1 0
80 71P 67 Rad 21 39 59.8 +46 43 07           ~ 1 0
81 71P 95 Rad 21 40 01.5 +47 55 56           ~ 1 0
82 71P 76 Rad 21 40 02.2 +46 56 52           ~ 1 0
83 71P 93 Rad 21 40 25.0 +47 50 24           ~ 1 0
84 NVSS J214030+471115 Rad 21 40 30.6 +47 11 13           ~ 3 1
85 71P 51 Rad 21 40 53.4 +46 11 56           ~ 1 0
86 NVSS J214055+464019 Rad 21 40 55.2 +46 40 18           ~ 2 0
87 71P 46 Rad 21 41 11.9 +46 00 18           ~ 1 0
88 71P 47 Rad 21 41 17.7 +45 59 30           ~ 1 0
89 71P 91 Rad 21 41 33.2 +47 32 15           ~ 1 0
90 71P 100 Rad 21 41 54.7 +47 43 18           ~ 1 0
91 71P 101 Rad 21 42 11.7 +47 40 03           ~ 1 0
92 71P 58 Rad 21 42 30.3 +46 01 33           ~ 1 0
93 71P 104 Rad 21 42 40.1 +47 52 51           ~ 1 0
94 71P 86 Rad 21 42 54.4 +46 46 58           ~ 1 0
95 71P 102 Rad 21 42 58.7 +47 31 22           ~ 1 0
96 NVSS J214301+461725 Rad 21 43 01.4 +46 17 28           ~ 2 0
97 71P 65 Rad 21 43 05.0 +46 03 03           ~ 1 0
98 NVSS J214312+461025 Rad 21 43 12.9 +46 10 25           ~ 2 1
99 71P 92 Rad 21 43 18.6 +47 13 02           ~ 1 0
100 71P 105 Rad 21 43 38.4 +47 44 18           ~ 1 0
101 71P 97 Rad 21 43 45.8 +47 14 24           ~ 1 1
102 71P 89 BLL 21 43 46.0 +46 49 28           ~ 2 0
103 72P 53 Rad 21 43 46.7 +47 14 52           ~ 1 1
104 71P 99 Rad 21 43 53.3 +47 16 24           ~ 1 1
105 71P 87 Rad 21 43 54.0 +46 37 04           ~ 1 0
106 UGC 11804 rG 21 44 09.8032684752 +46 14 46.211586036           ~ 18 0
107 71P 88 Rad 21 44 13.5 +46 37 19           ~ 1 0
108 71P 103 Rad 21 44 16.4 +47 23 30           ~ 1 0
109 71P 106 Rad 21 44 36.8 +47 36 56           ~ 1 0
110 71P 90 Rad 21 45 45.9 +46 34 55           ~ 1 0
111 71P 96 Rad 21 45 46.2 +46 49 34           ~ 1 0
112 NVSS J214559+464855 Rad 21 45 59.9 +46 48 57           ~ 2 0

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