* Astronomy

Members Login
Post Info TOPIC: Supernova Remnant W44


L

Posts: 131433
Date:
RE: Supernova Remnant W44
Permalink  
 


Life and death in a star-forming cloud

w44_HERSCHEL_XMM_L.jpg

The aftershock of a stellar explosion rippling through space is captured in this new view of supernova remnant W44, which combines far-infrared and X-ray data from ESA's Herschel and XMM-Newton space observatories.
W44, located around 10 000 light-years away within a forest of dense star-forming clouds in the constellation of Aquila, the Eagle, is one of the best examples of a supernova remnant interacting with its parent molecular cloud.

Read more



__________________


L

Posts: 131433
Date:
Permalink  
 

Title: Gamma-Ray Emission from the Shell of Supernova Remnant W44 Revealed by the Fermi LAT
Authors: A.A. Abdo et al. (Fermi LAT Collaboration)

Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~1015 eV. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 200 MeV and 300 GeV. The detection of a source with a morphology corresponding to the SNR shell implies that the emission is produced by particles accelerated there. The gamma-ray spectrum is well modelled with emission from protons and nuclei. Its steepening above ~GeV provides a probe with which to study how particle acceleration responds to environmental effects such as shock propagation in dense clouds, and how accelerated particles are released into interstellar space.

Read more (Subscription)

__________________
Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard