Astronomy:LMC N132D

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Short description: Supernova Remnant in the Large Magellanic Cloud
LMC N132D
Other designationsLMC N132D, SNR J052501-693842, IRAS 05240-6948
Spectral classII
ConstellationDorado
Right ascension05h 25m 1.4s
Declination-69° 38' 31.0"
EpochJ2000
Galactic coordinatesLarge Magellanic Cloud
[edit on Wikidata]

LMC N132D (also known as SNR J052501-693842) is a prominent supernova remnant (SNR) located in the Large Magellanic Cloud (LMC), a satellite galaxy of the Milky Way Galaxy, in the constellation of Dorado. It lies approximately 170,000 light-years (52,000 parsecs) away. It is one of the brightest and most studied oxygen-rich SNRs in the LMC, known for its complex morphology and high-energy emissions across multiple wavelengths.[1][2][3]

Observation

LMC N132D is a very high-energy (VHE) gamma-ray source, detected by the High Energy Stereoscopic System (H.E.S.S.) with an angular resolution of ~0.05 degrees. Its power-law spectrum extends beyond 8 TeV without a cutoff, unusual for a remnant of its age, making it a key target for studying particle acceleration in mature SNRs.[4] It is located near the center of the galaxy, 1.5 degrees west of the Tarantula Nebula . The nebula emits X-rays, and its material travels at a speed of 2000 km/s.[5][6]

Significance

LMC N132D offers critical insights into core-collapse supernovae, shock interactions with the interstellar medium, and non-thermal processes in SNRs. Its oxygen-rich ejecta and association with molecular clouds provide clues about the progenitor star's environment and evolution. The remnant's gamma-ray emission challenges models of particle acceleration, as its mature age contrasts with its high-energy output.[7][8]

References

  1. ↑ "Supernova Remnant LMC N132D - NASA Science" (in en-US). 2009-09-09. https://science.nasa.gov/asset/hubble/supernova-remnant-lmc-n132d/. 
  2. ↑ information@eso.org. "Oxygen-Rich Supernova" (in en). https://www.esahubble.org/images/opo9513a/. 
  3. ↑ "COS Spectrum of Supernova Remnant LMC N132D - NASA Science" (in en-US). 2009-09-09. https://science.nasa.gov/asset/hubble/cos-spectrum-of-supernova-remnant-lmc-n132d/. 
  4. ↑ Abdalla, H.; Aharonian, F.; Benkhali, F. Ait; Angüner, E. O.; Arcaro, C.; Armand, C.; Armstrong, T.; Ashkar, H. et al. (2021-11-01). "LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV" (in en). Astronomy & Astrophysics 655: A7. doi:10.1051/0004-6361/202141486. ISSN 0004-6361. Bibcode: 2021A&A...655A...7H. https://www.aanda.org/articles/aa/abs/2021/11/aa41486-21/aa41486-21.html. 
  5. ↑ "A Supernova Remnant in the Large Magellanic Cloud (SEDS HST Archive 79 of 135)". http://seds.lpl.arizona.edu/hst/N132D.html. 
  6. ↑ "N132D - IACHEC - MIT Wiki Service". https://wikis.mit.edu/confluence/display/iachec/N132D. 
  7. ↑ Vink, Jacco; Simoni, Rachel; Komin, Nukri; Prokhorov, Dmitry (2021-07-22), LMC N132D: a mature supernova remnant with a youthful gamma-ray spectrum, Bibcode: 2022icrc.confE.778V 
  8. ↑ "Molecular Clouds and Supernova Remnants in the LMC". https://www.physics.rutgers.edu/~jackph/science/snr_mc.html. 



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