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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2021

New Optically Identified Supernova Remnants in the Large Magellanic Cloud

Miranda Yew
  • Function : Author
Miroslav D. Filipović
  • Function : Author
Milorad Stupar
  • Function : Author
Sean D. Points
  • Function : Author
Manami Sasaki
  • Function : Author
Frank Haberl
  • Function : Author
Patrick J. Kavanagh
  • Function : Author
Quentin A. Parker
  • Function : Author
Evan J. Crawford
  • Function : Author
Branislav Vukotić
  • Function : Author
Dejan Urošević
  • Function : Author
Hidetoshi Sano
  • Function : Author
Ivo R. Seitenzahl
  • Function : Author
Gavin Rowell
  • Function : Author
Denis Leahy
  • Function : Author
Luke M. Bozzetto
  • Function : Author
Chandreyee Maitra
  • Function : Author
Howard Leverenz
  • Function : Author
Jeffrey L. Payne
  • Function : Author
Laurence A.F. Park
  • Function : Author
Rami Z.E. Alsaberi
  • Function : Author
Thomas G. Pannuti
  • Function : Author

Abstract

We present a new optical sample of three Supernova Remnants (SNRs) and 16 Supernova Remnant (SNR) candidates in the Large Magellanic Cloud (LMC). These objects were originally selected using deep H α, [S ii], and [O iii] narrow-band imaging. Most of the newly found objects are located in less dense regions, near or around the edges of the LMC’s main body. Together with previously suggested MCSNR J0541–6659, we confirm the SNR nature for two additional new objects: MCSNR J0522–6740 and MCSNR J0542–7104. Spectroscopic follow-up observations for 12 of the LMC objects confirm high [S ii]/H α emission-line ratios ranging from 0.5 to 1.1. We consider the candidate J0509–6402 to be a special example of the remnant of a possible type Ia Supernova (SN) which is situated some 2° (∼1.75 kpc) north from the main body of the LMC. We also find that the SNR candidates in our sample are significantly larger in size than the currently known LMC SNRs by a factor of ∼2. This could potentially imply that we are discovering a previously unknown but predicted, older class of large LMC SNRs that are only visible optically. Finally, we suggest that most of these LMC SNRs are residing in a very rarefied environment towards the end of their evolutionary span where they become less visible to radio and X-ray telescopes.
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Dates and versions

hal-03034753 , version 1 (25-05-2024)

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Miranda Yew, Miroslav D. Filipović, Milorad Stupar, Sean D. Points, Manami Sasaki, et al.. New Optically Identified Supernova Remnants in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2021, 500 (2), pp.2336-2358. ⟨10.1093/mnras/staa3382⟩. ⟨hal-03034753⟩
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