1999ApJ...518..298P

Query : 1999ApJ...518..298P

1999ApJ...518..298P - Astrophys. J., 518, 298-323 (1999/June-2)

The supergiant shell LMC 2. I. The kinematics and physical structure.

POINTS S.D., CHU Y.H., KIM S., SMITH R.C., SNOWDEN S.L., BRANDNER W. and GRUENDL R.A.

Abstract (from CDS):

LMC 2 has the brightest, most coherent filamentary structure of all known supergiant shells in the Large Magellanic Cloud. The optical emission-line images show active star formation regions along the western edge and long filaments to the east. ROSAT PSPC and HRI images show bright X-ray emission from within the shell boundary, indicating the presence of hot gas. Counterintuitively, neither high-resolution echelle spectra in the Hα line nor aperture synthesis H I 21 cm emission-line observations show LMC 2 to have the kinematics expected of an expanding shell. Rather, LMC 2 appears to consist of hot gas confined between H I sheets. The interior surfaces of these sheets are ionized by the UV flux of massive stars in the star formation regions along the periphery of LMC 2, while the heating is provided by outflows of hot gas from the star formation regions and by SNRs interior to LMC 2. We have compared LMC 2 to other supergiant shells in the LMC and in more distant galaxies. When the spatial resolution of our data are degraded, we find that LMC 2 resembles supergiant shells observed at a distance of 4 Mpc that have previously been interpreted as expanding shells. Therefore, great caution should be exercised in the analysis and interpretation of the kinematics of distant supergiant shells to prevent overestimates of their velocities and total kinetic energies.

Abstract Copyright: ∼

Journal keyword(s): ISM: Bubbles - ISM: individual (LMC 2) - ISM: Kinematics and Dynamics - Galaxies: Magellanic Clouds

CDS comments: regions p.320 = [M98b] regions.

Simbad objects: 82

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Number of rows : 82
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12643 1
2 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
3 NGC 604 HII 01 34 32.1 +30 47 01           ~ 586 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17428 0
5 SNR J052559-660453 SNR 05 26 00.4 -66 05 02     12.71     ~ 437 2
6 LHA 120-N 51 EmO 05 26 47 -67 31.1           ~ 45 0
7 NAME LMC 4 Supergiant Shell sh 05 31 33 -66 40.5           ~ 176 0
8 LHA 120-N 55 EmO 05 32 32.9 -66 24 20           ~ 43 0
9 NGC 2029 SNR 05 35 15.5 -67 34 04     12.29     ~ 102 0
10 NGC 2030 HII 05 35 33.6 -66 02 26           ~ 73 0
11 LHA 120-N 157 HII 05 35 49 -69 12.6           ~ 50 0
12 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1189 2
13 NGC 2074 As* 05 39 03 -69 29.9           ~ 62 0
14 LHA 120-N 158 HII 05 39 11.220 -69 30 13.65           ~ 87 0
15 DEM L 269 HII 05 39 31.1 -69 27 31           ~ 25 0
16 NGC 2077 Cl* 05 39 34.5 -69 39 19   11.71 11.71     ~ 41 1
17 NGC 2080 HII 05 39 42.6 -69 38 50           ~ 99 1
18 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 276 2
19 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 119 1
20 NGC 2078 EmO 05 39 54 -69 44.9   11.01 10.89     ~ 30 0
21 LH 105 As* 05 39 54 -69 44.9   9.00 8.73     ~ 28 0
22 LH 103 As* 05 39 57 -69 39.6   8.50 8.09     ~ 29 0
23 NGC 2083 Cl* 05 39 59 -69 44.1     10.83     ~ 16 0
24 LH 104 As* 05 39 59 -69 24.1   10.13 9.94     ~ 40 0
25 DEM L 271 HII 05 40 06.8 -69 45 28           ~ 20 0
26 NGC 2085 Cl* 05 40 08.6 -69 40 20     12.06     ~ 20 0
27 PSR B0540-69 Psr 05 40 11.2000490438 -69 19 54.198559829           ~ 904 3
28 NGC 2084 Cl* 05 40 17 -69 45.4           ~ 6 0
29 NGC 2086 Cl* 05 40 23.9 -69 40 17     12.00     ~ 27 1
30 [HS66] 384 OpC 05 40 41 -69 42.6           ~ 6 0
31 [NKN2005] N160-O8 OpC 05 40 50.2 -69 33 05           ~ 12 0
32 NGC 2091 Cl* 05 40 59.410 -69 26 13.79   12.39 12.07     ~ 17 0
33 CPD-69 500 s*b 05 41 20.1251716560 -69 36 22.989236904 11.307 11.790 11.790   11.910 B4I-III 28 0
34 NGC 2092 Cl* 05 41 22.600 -69 13 31.29           ~ 14 0
35 NAME LMC 2 Supergiant Shell sh 05 41 27 -69 22.4           ~ 191 0
36 KMHK 1239 OpC 05 41 30 -69 11.1           ~ 11 0
37 LH 108 As* 05 41 36 -69 40.8           ~ 11 0
38 NGC 2093 As* 05 41 50.970 -68 54 57.57   11.89 11.57     ~ 30 0
39 NGC 2100 Cl* 05 42 07.200 -69 12 26.99   9.6       ~ 189 0
40 LH 111 As* 05 42 09 -69 12.6   9.11 8.94     ~ 28 0
41 NGC 2094 Cl* 05 42 12 -68 55.0           ~ 7 0
42 DEM L 298 Rad 05 42 17.2 -69 05 45           ~ 16 0
43 NGC 2102 Cl* 05 42 25.090 -69 29 29.54     11.44     ~ 18 0
44 LHA 120-N 164 EmO 05 42 34 -69 04.9           ~ 20 0
45 KMHK 1274 As* 05 42 42 -69 03.7     11.05     ~ 28 0
46 KMHK 1284 OpC 05 43 04 -69 45.4           ~ 5 0
47 LHA 120-N 163 HII 05 43 04.6 -69 45 57           ~ 24 0
48 SNR B0543-68.9 SNR 05 43 08 -68 58.3           ~ 56 0
49 LHA 120-N 72 EmO 05 43 35.8 -66 18 13     12.98     ~ 14 0
50 PMN J0543-6918 Rad 05 43 37.2 -69 17 49           ~ 16 0
51 KMHK 1303 Cl* 05 43 48.870 -69 47 18.81   13.03 12.61     ~ 8 0
52 NGC 2108 GlC 05 43 56.270 -69 10 54.37   12.90 12.32     ~ 67 0
53 LHA 120-N 167 HII 05 44 24.2 -69 22 43           ~ 20 0
54 NGC 2113 Cl* 05 45 22 -69 46.4           ~ 15 0
55 LHA 120-N 168 HII 05 45 22.2 -69 46 21           ~ 14 0
56 KMHK 1345 OpC 05 45 50 -69 22.8           ~ 9 0
57 KMHK 1347 OpC 05 45 56 -69 16.3           ~ 10 0
58 LHA 120-N 169C HII 05 46 05.8 -69 33 28           ~ 12 0
59 KMHK 1353 Cl* 05 46 13.840 -69 05 05.39           ~ 10 0
60 LHA 120-N 169B EmG 05 46 28.894 -69 35 14.37   17.64   16.65   ~ 15 0
61 LHA 120-N 169A HII 05 46 33.9 -69 34 22           ~ 13 0
62 SNR B0547-69.7 SNR 05 47 17.5 -69 41 38           ~ 94 1
63 KMHK 1379 Cl* 05 47 37.480 -69 19 42.48           ~ 7 0
64 NGC 2118 Cl* 05 47 39.310 -69 07 52.91   13.454 13.384     ~ 21 0
65 [M98b] NGC 1569-A sh ~ ~           ~ 3 0
66 [M98b] NGC 5253-E sh ~ ~           ~ 1 0
67 [M98b] NGC 3077-G sh ~ ~           ~ 1 0
68 [M98b] NGC 3077-B sh ~ ~           ~ 1 0
69 [M98b] NGC 3077-A sh ~ ~           ~ 1 0
70 [M98b] NGC 1800-N sh ~ ~           ~ 1 0
71 [M98b] I Zw 18-S sh ~ ~           ~ 1 0
72 [M98b] NGC 4449-H sh ~ ~           ~ 1 0
73 [M98b] NGC 4861-C sh ~ ~           ~ 1 0
74 [M98b] NGC 4861-A sh ~ ~           ~ 1 0
75 [M98b] NGC 1569-G sh ~ ~           ~ 4 0
76 [M98b] NGC 1569-E sh ~ ~           ~ 3 0
77 [M98b] NGC 1569-D sh ~ ~           ~ 2 0
78 [M98b] NGC 4214-F sh ~ ~           ~ 1 0
79 [M98b] NGC 1569-B sh ~ ~           ~ 4 0
80 [M98b] NGC 4449-A sh ~ ~           ~ 1 0
81 [M98b] NGC 2363-A sh ~ ~           ~ 2 0
82 [M98b] NGC 2363-B sh ~ ~           ~ 1 0

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