New optically identified supernova remnants in the Large Magellanic Cloud

Yew M, Filipovic MD, Stupar M, Points SD, Sasaki M, Maggi P, Haberl F, Kavanagh PJ, Parker QA, Crawford EJ, Vukotic B, Urosevic D, Sano H, Seitenzahl IR, Rowell G, Leahy D, Bozzetto LM, Maitra C, Leverenz H, Payne JL, Park LAF, Alsaberi RZE, Pannuti TG (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Monthly Notices of the Royal Astronomical Society Oxford University Press

Book Volume: 500

Pages Range: 2336-2358

Journal Issue: 2

DOI: 10.1093/mnras/staa3382

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.

Authors with CRIS profile

Manami Sasaki Professur für Multiwellenlängenastronomie

Involved external institutions

University of Western Sydney AU Australia (AU) Cerro Tololo Inter-American Observatory (CTIO) CL Chile (CL) Université de Strasbourg (UDS) FR France (FR) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics DE Germany (DE) Dublin Institute for Advanced Studies (DIAS) IE Ireland (IE) University of Hong Kong (HKU) / 香港大學 HK Hong Kong (HK) Astronomical Observatory Belgrade RS Serbia (RS) University of Belgrade / Универзитет у Београду RS Serbia (RS) Nagoya University / 名古屋大学 JP Japan (JP) University of New South Wales (UNSW) AU Australia (AU) University of Adelaide AU Australia (AU) University of Calgary CA Canada (CA) Morehead State University US United States (USA) (US)

How to cite

APA:

Yew, M., Filipovic, M.D., Stupar, M., Points, S.D., Sasaki, M., Maggi, P.,... Pannuti, T.G. (2021). New optically identified supernova remnants in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 500(2), 2336-2358. https://doi.org/10.1093/mnras/staa3382

MLA:

Yew, Miranda, et al. "New optically identified supernova remnants in the Large Magellanic Cloud." Monthly Notices of the Royal Astronomical Society 500.2 (2021): 2336-2358.

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