Large Magellanic Cloud

Supernova Remnants

It is dumbfounding that we can sit at our telescopes in our own galaxy and see the tattered shreds of massive stars that died in titanic explosions in another galaxy

The first extragalactic supernova remnants

N49, N63A, and N132D were not only the first supernova remnants (SNRs) discovered in the Large Magellanic Cloud, but they were also the first extragalactic SNRs discovered. They were discovered by Mathewson & Healey (1964), and later confirmed by Westerlund & Mathewson (1966) through follow-up radio and optical observations. Since then, there have been a considerable number of additions to that population, with ~60 confirmed supernovae to date (unfortunately most without optical remnants for us to observe). The rate of supernovae occurring in the LMC is estimated to be ∼1 per 200 years.

The Cloud offers us a nice smorgasbord of SNRs to observe, from the superbly bright N49 to the beautiful but somewhat challenging N63 to faint and tattered streaks fading away to nothingness in the sky. Not only does one need dark skies for SNRs but very good transparency is also key. I have found that even under a Bortle 1 sky, if transparency is not up to scratch then the ghostly whisps of the more challenging SNRs will remain invisible. And a good OIII filter is essential.

N49

N49, the kind of stellar wreckage out of which the universe created us. Credit ESO/Hubble

N63

N63A spewing a violent and chaotic-looking mass of gas and dust out into an already turbulent region. Credit NASA, ESA, HEIC, and The Hubble Heritage Team

N132D

N132D’s tattered debris shows the complex collisions that take place as fast moving ejecta slam into cool, dense interstellar clouds. Credit NASA, ESA and the Hubble SM4 ERO Team

Scrollable Table

From the Statistical Analysis of Supernova Remnants in the Large Magellanic Cloud – Luke M. Bozzetto et al (2017)

Location: LMC = Supergiant Shell. N = Henize Nebula. SB = Superbubble. 

Supernova Remnants

Name
MCSNR J
RA
Dec
Size'
Age (yr)
Region
Location
N4D
0453 6655
004 53 21.0
-66 56 19
3.7×1.1
-
Northwest
N4
N9
0454 6712
04 55 10.9
-67 11 32
2.3x2.0
13,500 ± 1,500
Northwest
Central Chart
N11L
0454 6625
04 54 48.0
-66 25 42
1.6x1.1
29,500 ± 7,500
Northwest
SB N11
N23
0505 6801
05 05 55.0
-68 01 54
1.6x1.5
11,000 ± 4,000
Northwest
Central Chart
N44I
0523 6753
05 23 06.5
-67 53 09
3.8
18,000
Northwest
SB N44
N48E
0524 6623
05 24 18.9
-66 23 33
2.4
-
Northwest
LMC 5
N49
0526 6605
05 26 00.4
-66 05 02
1.3
4,800
Northwest
N49
N59B
0536 6735
05 35 15.5
-67 34 04
2.5x2.1
60,000 ± 10,000
Northeast
N59
N63A
0535 6602
05 35 43.1
-66 01 59
1.4x1.1
3,500 ± 1,500
Northeast
N63
N86
0455 6839
04 55 55.9
-68 38 29
4.9x3.6
53,000 ± 33,000
Northwest
LMC 6
N103B
0508 6843
05 08 59.4
-68 43 35
0.5
860
Bar
SB N103
N112
0513 6912
05 13 14.4
−69 12 15
4.1×3.3
3,500 ± 1,500
Bar
Chart 2
N120
0518 6939
05 19 04.5
-69 38 56
1.4×1.7
7,300
Bar
N120
N157B
0537 6910
05 37 51.4
-69 10 23
2.3x1.9
5,000
Southeast
30 Doradus
N165
0543 6900
05 43 08.0
-68 58 18
3.8
10,800 ± 7,300
Southeast
LMC 2
N186D
0459 7008
04 59 57.3
-70 08 07
1.9
11,000
Southwest
SB N186
DEM L316A
0547 6941
05 47 20.9
-69 41 27
1.9x2.0
33,000 ± 6,000
Southeast
Central Chart
DEM L316B
0547 6942
05 47 00.0
-69 42 50
3.3x2.6
40,500 ± 1,500
Southeast
Central Chart
Honeycomb
0535 6918
05 35 45.5
-69 18 08
1.5x1.0
-
Southeast
30 Doradus
SN1987A
0535 6916
05 35 28.0
-69 16 11
-
38
Southeast
30 Doradus

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