2021A&A...653A..16C


Query : 2021A&A...653A..16C

2021A&A...653A..16C - Astronomy and Astrophysics, volume 653A, 16-16 (2021/9-1)

Tracking down the origin of superbubbles and supergiant shells in the Magellanic Clouds with Minkowski tensor analysis.

COLLISCHON C., SASAKI M., MECKE K., POINTS S.D. and KLATT M.A.

Abstract (from CDS):


Aims. We develop an automatic bubble-recognition routine based on Minkowski functionals (MF) and tensors (MT) to detect bubble-like interstellar structures in optical emission line images.
Methods. Minkowski functionals and MT are powerful mathematical tools for parameterizing the shapes of bodies. Using the papaya2-library, we created maps of the desired MF or MT of structures at a given window size. We used maps of the irreducible MT ψ2, which is sensitive to elongation, to find filamentary regions in Hα, [SII], and [OIII] images of the Magellanic Cloud Emission Line Survey. Using the phase of ψ2, we were able to draw lines perpendicular to each filament and thus obtain line-density maps. This allowed us to find the center of a bubble-like structure and to detect structures at different window sizes.
Results. The detected bubbles in all bands are spatially correlated to the distribution of massive stars, showing that we indeed detect interstellar bubbles without large spatial bias. Eighteen out of 59 supernova remnants in the Large Magellanic Cloud (LMC) and 13 out of 20 superbubbles are detected in at least one wavelength. The lack of detection is mostly due to surrounding emission that disturbs the detection, a too small size, or the lack of a (circular) counterpart in our emission line images. In line-density maps at larger scales, maxima can be found in regions with high star formation in the past, often inside supergiant shells (SGS). In SGS LMC 2, there is a maximum west of the shell where a collision of large gas clouds is thought to have occurred. In the Small Magellanic Cloud (SMC), bubble detection is impaired by the more complex projected structure of the galaxy. Line maps at large scales show large filaments in the SMC in a north-south direction, especially in the [SII] image. The origin of these filaments is unknown.

Abstract Copyright: © ESO 2021

Journal keyword(s): ISM: structure - Magellanic Clouds - methods: data analysis - methods: statistical

Simbad objects: 30

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Number of rows : 30
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10465 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6503 1
3 NAME LMC 7 Supergiant Shell HII 04 53 41 -69 35.2           ~ 25 0
4 LHA 120-N 185 EmO 04 53 58.9 -70 00 53           ~ 37 0
5 LHA 120-N 9 HII 04 55 10.9 -67 11 32           ~ 52 1
6 DEM L 34 HII 04 56 34.3 -66 26 52           ~ 101 0
7 NAME LMC 6 Supergiant Shell HII 04 57 48 -68 40.5           ~ 25 0
8 NAME LMC 1 Supergiant Shell sh 04 59 41 -65 44.7           ~ 36 0
9 NAME LMC 8 Supergiant Shell sh 05 02 51 -70 33.3           ~ 32 0
10 LHA 120-N 105A HII 05 09 34.3 -68 53 45           ~ 53 1
11 DEM L 106 HII 05 13 53.1 -67 27 05           ~ 32 0
12 NAME LMC Bar PoG 05 22 08 -69 23.5           ~ 296 0
13 NAME LMC 5 Supergiant Shell sh 05 22 42 -66 05.6           ~ 51 0
14 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16411 1
15 LHA 120-N 51D HII 05 25 17.3 -67 22 47           ~ 111 0
16 NAME LMC 9 Supergiant Shell sh 05 25 46 -71 09.3           ~ 24 0
17 LHA 120-N 144 HII 05 26 42.5 -68 49 34           ~ 67 0
18 MCSNR J0528-6727 HII 05 28 06.2 -67 26 50           ~ 22 0
19 NAME LMC 3 Supergiant Shell sh 05 30 26 -69 07.9           ~ 70 0
20 LHA 120-N 206A HII 05 31 15.2 -71 03 58           ~ 104 2
21 NAME LMC 4 Supergiant Shell sh 05 31 33 -66 40.5           ~ 173 0
22 LHA 120-N 154 HII 05 35 04.8 -69 43 25           ~ 45 0
23 NAME 30 Dor C Rad 05 36 07.70 -69 11 52.6           ~ 74 1
24 NAME 30 Dor Region reg 05 38.0 -69 06           ~ 216 0
25 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1127 2
26 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1899 1
27 DEM L 269 HII 05 39 31.1 -69 27 31           ~ 24 0
28 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 114 1
29 NAME LMC 2 Supergiant Shell sh 05 41 27 -69 22.4           ~ 183 0
30 LHA 120-N 70 HII 05 43 17.5 -67 50 48           ~ 81 0

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2022.12.07-03:24:15

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