2007MNRAS.377..687L


Query : 2007MNRAS.377..687L

2007MNRAS.377..687L - Mon. Not. R. Astron. Soc., 377, 687-704 (2007/May-2)

Highly ionized plasma in the Large Magellanic Cloud: evidence for outflows and a possible galactic wind.

LEHNER N. and HOWK J.C.

Abstract (from CDS):

Based on an analysis of the interstellar highly ionized species Civ, Siiv, Nv and Ovi observed in the Far Ultraviolet Spectroscopic Explorer (FUSE) and Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) E140M spectra of four hot stars in the Large Magellanic Cloud (LMC), we find evidence for a hot LMC halo fed by energetic outflows from the LMC disc and even possibly an LMC galactic wind. Signatures for such outflows are the intermediate- and high-velocity components (vLSR≳ 100km/s) relative to the LMC disc observed in the high- and low-ion absorption profiles. The stellar environments produce strong, narrow (T ≲ 2 x104K) components of Civ and Siiv associated with the LMC disc; in particular they are likely signatures of Hii regions and expanding shells. Broad components are observed in the profiles of Civ, Siiv and Ovi with their widths implying hot, collisionally ionized gas at temperatures of a few times 105K. There is a striking similarity in the Ovi/Civ ratios for the broad LMC and high-velocity components, suggesting much of the material at vLSR≳ 100km/s is associated with the LMC. The velocity of the high-velocity component is large enough to escape altogether the LMC, polluting the intergalactic space between the LMC and the Milky Way. The observed high-ion ratios of the broad LMC and high-velocity components are consistent with those produced in conductive interfaces; such models are also favoured by the apparent kinematically coupling between the high and the weakly ionized species.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): ISM: clouds - ISM: kinematics and dynamics - ISM: structure - galaxies: individual: Large Magellanic Cloud - galaxies: ISM - ultraviolet: ISM

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 858 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9998 1
3 LHA 120-N 3 HII 04 50 08.0 -67 42 10           ~ 13 0
4 HD 268605 s*b 04 50 18.9253786780 -67 39 38.040164010 10.244 11.2 11.377   11.322 O9.5/B0Ia 81 0
5 HD 32109 WR* 04 55 31.3419672483 -67 30 02.683822100 12.893 13.46 13.81 13.95 13.512 WN4b 71 0
6 NAME LMC 1 Supergiant Shell sh 04 59 41 -65 44.7           ~ 36 0
7 HD 270952 WR* 05 01 23.0763030544 -65 52 33.203698483 10.944 11.871 12.07   12.187 O6Iaf+ 52 0
8 NGC 1787 As* 05 01 45.260 -65 49 27.82   11.09 10.92     ~ 26 0
9 LHA 120-N 13 HII 05 01 53.6 -65 53 30           ~ 17 1
10 HD 33133 WR* 05 03 08.9129394547 -66 40 57.494039004   12.46 12.63 12.85   WN7h 89 0
11 DEM L 56 HII 05 03 22.8 -66 42 02           ~ 10 0
12 SV* HV 5682 XB* 05 13 50.809 -69 51 47.30     16.566 16.606 16.62 ~ 307 0
13 DEM L 107 HII 05 13 56 -67 08.1           ~ 11 0
14 SK -67 69 * 05 14 20.0724897322 -67 08 03.171856399 11.950 13.012 13.040   13.330 O3III 24 0
15 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15682 1
16 HD 36402 WR* 05 26 03.9637508160 -67 29 57.087055949   11.25 11.621 11.65   (WC) 135 0
17 HD 36521 WR* 05 26 30.2634371012 -68 50 27.502484139   12.156 12.317 12.529   WC4+O6III/V+O 82 0
18 LHA 120-N 144 HII 05 26 42.5 -68 49 34           ~ 65 0
19 LHA 120-N 204 EmO 05 27 17.6 -70 34 46           ~ 27 0
20 SK -70 91 ** 05 27 33.5736776673 -70 36 47.954697209 11.369 12.55 12.78   12.937 O2III(f*)+OB 26 0
21 SK -66 100 * 05 27 45.4472881165 -66 55 15.296369854 12.227 12.976 13.204   13.501 O6II(f) 44 0
22 HD 37026 WR* 05 30 12.1637558730 -67 26 08.329160840 12.853 13.16 13.53 13.56 13.856 WC 71 0
23 LHA 120-N 206A HII 05 31 15.2 -71 03 58           ~ 100 2
24 HD 269676 ** 05 31 15.634248 -71 04 09.90516 11.134 11.417 11.547 12.061 12.191 O6+O9: 76 0
25 NGC 2018 As* 05 31 24.00 -71 04 24.0   10.91 10.89     ~ 103 1
26 NAME LMC 4 Supergiant Shell sh 05 31 33 -66 40.5           ~ 170 0
27 HD 37680 WR* 05 34 19.2497853756 -69 45 10.298101295 12.807 12.98 13.25 13.21 13.490 WC 68 1
28 LHA 120-N 154 HII 05 35 04.8 -69 43 25           ~ 45 0
29 HD 269810 Em* 05 35 13.8987303206 -67 33 27.540351680   12.08 12.22 12.53   O3III(f*) 101 0
30 LH 82 As* 05 35 14 -67 33.8           ~ 24 0
31 NGC 2029 SNR 05 35 15.5 -67 34 04     12.29     ~ 96 0
32 NGC 2032 HII 05 35 23.5 -67 34 56           ~ 72 1
33 BI 237 * 05 36 14.6329670483 -67 39 19.168530216 12.865 13.790 13.830   13.948 O2V(f*) 33 0
34 LHA 120-N 64C EmO 05 37 02.7 -66 21 18           ~ 19 0
35 SK -66 172 * 05 37 05.3866803996 -66 21 35.035689408   13.01 13.1     OB 38 0
36 LH 100 As* 05 38 40 -69 05.8   5.81 5.40     ~ 28 1
37 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1830 1
38 HD 38282 WR* 05 38 53.3788120199 -69 02 00.896643506   10.98 11.11 11.26   WN5/6h+WN6/7h 154 1
39 LHA 120-N 70 HII 05 43 17.5 -67 50 48           ~ 80 0
40 2E 1550 XB* 05 43 34.1600994175 -68 22 22.189299745   15.9   17.2 16.54 ~ 309 0
41 BI 272 * 05 44 23.1094405128 -67 14 29.219368741 12.163 13.127 13.201   13.524 O7III 23 0
42 LHA 120-N 74 EmO 05 45 11 -67 09.5           ~ 21 0
43 LHA 120-S 61 WR* 05 45 51.9393679113 -67 14 25.939050679 10.870 11.86 11.95 12.09 11.931 WN11h 78 0
44 DEM L 315 HII 05 46 38.8 -67 10 39           ~ 12 0

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2021.12.09-14:59:24

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