* Astronomy

Members Login

Post Info

TOPIC: G348.5+0.1

Blobrana

L

Posts: 131433

Date: May 4 23:04 2013

CTB 37A	Permalink

Title: A View of Supernova Remnant CTB 37A with the Fermi Gamma-ray Space Telescope Authors: T. J. Brandt (the Fermi Large Area Telescope Collaboration) Supernovae and their remnants have long been favoured as cosmic ray accelerators. Recent data from the Fermi Gamma-ray Space Telescope has given us an improved window into such sources, including the remnant CTB 37A. Using the Fermi Large Area Telescope, we found significant gamma-ray emission coincident with the remnant, which also emits in radio, X-ray, and very high energy gamma-rays. We modelled the multiwavelength spectrum using a combination of hadronic and leptonic emission with reasonable parameter values and determined that CTB 37A is a potential cosmic ray accelerator commensurate with direct observations. By assembling statistically significant populations of such objects, we will be able to more fully illuminate the mystery of cosmic ray origins. Read more (450kb, PDF) __________________

Blobrana

L

Posts: 131433

Date: Jul 7 01:51 2011

G348.5+0.1	Permalink

Title: Suzaku observation of Galactic supernova remnant CTB 37A (G348.5+0.1) Authors: A. Sezer, F. Gök, M. Hudaverdi, E.N. Ercan We present here the results of the observation of CTB 37A obtained with the X-ray Imaging Spectrometer onboard the Suzaku satellite. The X-ray spectrum of CTB 37A is well fitted by two components, a single-temperature ionisation equilibrium component (VMEKAL) with solar abundances, an electron temperature of kT_e ~0.6 keV, absorbing column density of N_{H} ~3 x 10^{22} {cm^{-2}} and a power-law component with photon index of \Gamma ~1.6. The X-ray spectrum of CTB 37A is characterised by clearly detected K-shell emission lines of Mg, Si, S, and Ar. The plasma with solar abundances supports the idea that the X-ray emission originates from the shocked interstellar material. The ambient gas density, and age of the remnant are estimated to be ~1f^{-½} cm^{-3} and ~3 x 10^{4}f^{½} yr, respectively. The center-filling X-ray emission surrounded by a shell-like radio structure and other X-ray properties indicate that this remnant would be a new member of mixed-morphology supernova remnant class. Read more (895kb, PDF) __________________

Page 1 of 1 sorted by

Create your own FREE Forum
Report Abuse