释义 |
- References
{{sky|05|26|01.00|-|66|05|06.0|165000}}{{Infobox nebula |name = LMC N49 |image = Sig06-030.jpg |caption = |credit = |type = Supernova remnant |type2 = |epoch = J2000.0[1] |subtype = |class = |ra = {{RA|05|26|01.00}}[1] |dec = {{DEC|-66|05|06.0}}[1] |dist_ly = 160,000[4] |dist_pc = |dist_z = |appmag_v = 12.71[1] |appdia = |size_v = |constellation = Dorado |radius_ly = |radius_pc = |dimensions = 75 ly across[4] |absmag_v = |notes = |names = LMC N49,[[1] PKS 0525-66,][[1] PKS B0525-661,][[1] PKS J0525-6604,][[1] SNR J052559-660453][[1]] }}{{commonscat|N49}}N49 or LMC N49[ (PKS 0525-66,[1]][ PKS B0525-661,][ PKS J0525-6604,][ SNR J052559-660453[1]) is the brightest supernova remnant in the Large Magellanic Cloud, approximately 160,000 light-years from Earth. Its form has been assessed to be roughly 5,000 years old.[4]]The latest pictures of N49 by the Chandra X-ray Observatory have revealed a bullet-shaped object traveling at about 5 million miles an hour away from a bright X-ray and gamma-ray point source, probably a neutron star with an extremely powerful magnetic field, known as a soft gamma repeater.[4] A particularly strong gamma-ray burst from LMC N49 was detected on March 5, 1979.[25] References1. ^1 2 3 4 5 6 7 8 9 10 11 {{cite simbad |title= SNR J052559-660453 }} 2. ^1 2 3 4 {{cite web |url= http://chandra.harvard.edu/photo/2010/n49/ |title=N49: Stellar Shrapnel Seen in Aftermath of Explosion |author=Chandra X-ray Observatory |date=2010-05-24 |accessdate=2015-10-15}} 3. ^1 {{cite web |url=http://annesastronomynews.com/photo-gallery-ii/nebulae-clouds/n49-is-a-supernova-remnant-that-spans-about-30-ly-in-the-lmc-a-newly-born-magnetar-a-highly-magnetized-spinning-neutron-star-is-left-over-in-the-ancient-stellar-explosion-which-created-supernova-r/ |title= N49, an asymmetric supernova remnant in the LMC |date=2012-08-30 |accessdate=2015-10-15}}
[1][2][3] }}- Harvard-Smithsonian Center for Astrophysics, [https://www.cfa.harvard.edu/ssp/extreme_astrophysics/n49.html "N49: A supernova remnant in the Large Magellanic Cloud"]
3 : Dorado (constellation)|Large Magellanic Cloud|Supernova remnants |