scholarly journals New optically identified supernova remnants in the Large Magellanic Cloud

2020 ◽  
Vol 500 (2) ◽  
pp. 2336-2358
Author(s):  
Miranda Yew ◽  
Miroslav D Filipović ◽  
Milorad Stupar ◽  
Sean D Points ◽  
Manami Sasaki ◽  
...  

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.

2006 ◽  
Vol 642 (2) ◽  
pp. L141-L144 ◽  
Author(s):  
Kazimierz J. Borkowski ◽  
Brian J. Williams ◽  
Stephen P. Reynolds ◽  
William P. Blair ◽  
Parviz Ghavamian ◽  
...  

2009 ◽  
pp. 55-60 ◽  
Author(s):  
K.O. Cajko ◽  
E.J. Crawford ◽  
M.D. Filipovic

We present the results of new Australia Telescope Compact Array (ATCA) observations of one of the largest supernova remnants, SNR J0450-709, in the Local Group of galaxies. We found that this Large Magellanic Cloud (LMC) object exhibits a typical morphology of an old supernova remnant (SNR) with diameter D=102x75?1 pc and radio spectral index ?=-0.43?0.06. Regions of high polarization were detected with peak value of ~40%.


2009 ◽  
Author(s):  
Carles Badenes ◽  
Jason Harris ◽  
Dennis Zaritsky ◽  
José Luis Prieto ◽  
Giuliana Giobbi ◽  
...  

2004 ◽  
Vol 613 (2) ◽  
pp. 948-955 ◽  
Author(s):  
R. M. Williams ◽  
Y.‐H. Chu ◽  
J. R. Dickel ◽  
R. A. Gruendl ◽  
R. Shelton ◽  
...  

1998 ◽  
Vol 115 (3) ◽  
pp. 1057-1075 ◽  
Author(s):  
John R. Dickel ◽  
D. K. Milne

2018 ◽  
Vol 867 (1) ◽  
pp. 7 ◽  
Author(s):  
H. Sano ◽  
Y. Yamane ◽  
K. Tokuda ◽  
K. Fujii ◽  
K. Tsuge ◽  
...  

2016 ◽  
Vol 826 (2) ◽  
pp. 150 ◽  
Author(s):  
Michael A. Dopita ◽  
Ivo R. Seitenzahl ◽  
Ralph S. Sutherland ◽  
Frédéric P. A. Vogt ◽  
P. Frank Winkler ◽  
...  

2013 ◽  
Vol 549 ◽  
pp. A99 ◽  
Author(s):  
P. J. Kavanagh ◽  
M. Sasaki ◽  
S. D. Points ◽  
M. D. Filipović ◽  
P. Maggi ◽  
...  

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