scholarly journals Radio-continuum study of Large Magellanic Cloud supernova remnant J0509−6731

2014 ◽  
Vol 440 (4) ◽  
pp. 3220-3225 ◽  
Author(s):  
L. M. Bozzetto ◽  
M. D. Filipović ◽  
D. Urošević ◽  
R. Kothes ◽  
E. J. Crawford
Keyword(s):  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Radio Continuum

scholarly journals The supernova remnant population of the Small Magellanic Cloud

2019 ◽  
Vol 631 ◽  
pp. A127 ◽  
Author(s):  
Pierre Maggi ◽  
Miroslav D. Filipović ◽  
Branislav Vukotić ◽  
Jean Ballet ◽  
Frank Haberl ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
Ambient Medium ◽  
Line Emission ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Core Collapse ◽  
Small Magellanic Cloud ◽  
X Ray ◽  
The Difference

Aims. We present a comprehensive study on the supernova remnant (SNR) population of the Small Magellanic Cloud (SMC). We measured multiwavelength properties of the SMC SNRs and compare them to those of the Large Magellanic Cloud (LMC) population. Methods. This study combines the large dataset of XMM-Newton observations of the SMC, archival and recent radio continuum observations, an optical line emission survey, and new optical spectroscopic observations. We were therefore able to build a complete and clean sample of 19 confirmed and four candidate SNRs. The homogeneous X-ray spectral analysis allowed us to search for SN ejecta and Fe K line emission, and to measure interstellar medium abundances. We estimated the ratio of core-collapse to type Ia supernova rates of the SMC based on the X-ray properties and the local stellar environment of each SNR. Results. After the removal of unconfirmed or misclassified objects, and the addition of two newly confirmed SNRs based on multi-wavelength features, we present a final list of 21 confirmed SNRs and two candidates. While no Fe K line is detected even for the brightest and youngest SNR, we find X-ray evidence of SN ejecta in 11 SNRs. We estimate a fraction of 0.62–0.92 core-collapse supernova for every supernova (90% confidence interval), higher than in the LMC. The difference can be ascribed to the absence of the enhanced star-formation episode in the SMC, which occurred in the LMC 0.5–1.5 Gyr ago. The hot-gas abundances of O, Ne, Mg, and Fe are 0.1–0.2 times solar. Their ratios, with respect to SMC stellar abundances, reflect the effects of dust depletion and partial dust destruction in SNR shocks. We find evidence that the ambient medium probed by SMC SNRs is less disturbed and less dense on average than in the LMC, consistent with the different morphologies of the two galaxies.

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 ◽  
...  
Keyword(s):  
Supernova Remnants ◽  
Supernova Remnant ◽  
Narrow Band Imaging ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Main Body ◽  
Found Objects ◽  
Type Ia ◽  
Optical Sample

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.

scholarly journals FORBIDDEN IRON LINES AND DUST DESTRUCTION IN SUPERNOVA REMNANT SHOCKS: THE CASE OF N49 IN THE LARGE MAGELLANIC CLOUD

2016 ◽  
Vol 826 (2) ◽  
pp. 150 ◽  
Author(s):  
Michael A. Dopita ◽  
Ivo R. Seitenzahl ◽  
Ralph S. Sutherland ◽  
Frédéric P. A. Vogt ◽  
P. Frank Winkler ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Dust Destruction

scholarly journals Multiwavelength study of the newly confirmed supernova remnant MCSNR J0527−7104 in the Large Magellanic Cloud

2013 ◽  
Vol 549 ◽  
pp. A99 ◽  
Author(s):  
P. J. Kavanagh ◽  
M. Sasaki ◽  
S. D. Points ◽  
M. D. Filipović ◽  
P. Maggi ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud

scholarly journals Multifrequency radio observations of a SNR in the LMC: The case of SNR J0527-6549 (DEM l204)

2010 ◽  
pp. 43-49 ◽  
Author(s):  
L.M. Bozzetto ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
I.S. Bojicic ◽  
J.L. Payne ◽  
...  
Keyword(s):  
Spectral Index ◽  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
High Order ◽  
Older Age ◽  
Radio Observations ◽  
Large Size ◽  
Peak Value ◽  
Compact Array

We present a detailed study and results of new Australia Telescope Compact Array (ATCA) observations of supernova remnant SNR J0527-6549. This Large Magellanic Cloud (LMC) object follows a typical supernova remnant (SNR) horseshoe morphology with a diameter of D=(66?58)?1 pc which is among the largest SNRs in the LMC. Its relatively large size indicates older age while a steeper than expected radio spectral index of ?=-0.92?0.11 is more typical of younger and energetic SNRs. Also, we report detections of regions with a high order of polarization at a peak value of ~54%?17% at 6 cm.

scholarly journals Radio-continuum study of the supernova remnants in the large Magellanic Cloud: An SNR with a highly polarized breakout region: SNR J0455-6838

2008 ◽  
pp. 61-66 ◽  
Author(s):  
E.J. Crawford ◽  
M.D. Filipovic ◽  
Horta de ◽  
F.H. Stootman ◽  
J.L. Payne
Keyword(s):  
Supernova Remnants ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Strong Polarization ◽  
High Polarization ◽  
Moderate Resolution ◽  
Typical Appearance ◽  
D 43

We present the results of new moderate resolution ATCA observations of SNR J0455-6838. We found that this SNR exhibits a mostly typical appearance with rather steep and curved ?=-0.81?0.18 and D=43?31?1 pc. Regions of high polarization were detected, including unusually strong (~70%) region corresponding to the northern breakout. Such a strong polarization in breakout regions has not been observed in any other SNR.

A new oxygen-rich supernova remnant in the Large Magellanic Cloud

1980 ◽  
Vol 242 ◽  
pp. L73 ◽  
Author(s):  
D. S. Mathewson ◽  
M. A. Dopita ◽  
I. R. Tuohy ◽  
V. L. Ford
Keyword(s):  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud

scholarly journals Multifrequency study of the Large Magellanic Cloud supernova remnant J0529−6653 near pulsar B0529-66

2012 ◽  
Vol 420 (3) ◽  
pp. 2588-2595 ◽  
Author(s):  
L. M. Bozzetto ◽  
M. D. Filipović ◽  
E. J. Crawford ◽  
F. Haberl ◽  
M. Sasaki ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud

scholarly journals A DEEPCHANDRAOBSERVATION OF THE OXYGEN-RICH SUPERNOVA REMNANT 0540-69.3 IN THE LARGE MAGELLANIC CLOUD

2010 ◽  
Vol 710 (2) ◽  
pp. 948-957 ◽  
Author(s):  
Sangwook Park ◽  
John P. Hughes ◽  
Patrick O. Slane ◽  
Koji Mori ◽  
David N. Burrows
Keyword(s):  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud
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