Search results
Results from the WOW.Com Content Network
List of all known (extra)galactic supernova remnants at The Open Supernova Catalog Archived 2016-03-03 at the Wayback Machine. Chandra Galactic SNR gallery; SNRcat, the online high-energy catalogue of supernova remnants
SNR G054.1+00.3, also called G54.1+0.3, 2E 4258 and 2E 1928.3+1846 [1] is a supernova remnant located in the constellation Sagittarius. It was identified as a supernova remnant in a study of the galactic plane in the radio continuum at wavelengths of 21 and 11 cm. [ 2 ]
The estimated age of CTB 1 is 10,000 years, although the uncertainty of this value can be as high as 20%. [7] Other studies give it a greater age, around 16,700 years. [8] On the other hand, there is also no consensus regarding the distance at which this supernova remnant is located.
There are three types of supernova remnant: Shell-like, such as Cassiopeia A; Composite, in which a shell contains a central pulsar wind nebula, such as G11.2-0.3 or G21.5-0.9. Mixed-morphology (also called "thermal composite") remnants, in which central thermal X-ray emission is seen, enclosed by a radio shell.
Reaction of 4-chloropyridine with thioglycolic acid gives ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; ...
3C 392 is a supernova remnant of mixed morphology characterized by a bright radio-band shell and concentrated thermal X-ray emission from its center. In the radio band, 3C 392 has the appearance of a quasi-elliptic asymmetric bright shell, its emission being most intense along the eastern boundary; in the western region a bright arc can be seen. [3]
The estimated X-ray luminosity was 10 41 erg ·s −1, which is consistent with a supernova event within dense circumstellar material. [ 10 ] Most studies now favor a model of a very massive progenitor that ejected up to 10 M ☉ at a rate of around 10 −3 M ☉ ·yr −1 for a period of about 10,000 years prior to the explosion.
SNR 0509-67.5 is a remnant from a supernova in the Large Magellanic Cloud (LMC), that is 160,000 light years away in the constellation Dorado. It displays a clear shock wave shock shell pattern. It was probably a type Ia supernova , as indicated by the detection in 2004 of the elements silicon and iron .