Systematic Spatial Variations of the Spectrum of Synchrotron X-rays from the Youngest Galactic Supernova Remnant G1.9+0.3

@inproceedings{Reynolds2008SystematicSV,
  title={Systematic Spatial Variations of the Spectrum of Synchrotron X-rays from the Youngest Galactic Supernova Remnant G1.9+0.3},
  author={S. Reynolds and K. Borkowski and D. A. Green and U. Hwang and I. Harrus and R. Petre},
  year={2008}
}
Our 50 ks Chandra observation of the small radio supernova remnant (SNR) G1.9+0.3 shows a complete shell structure with strong bilateral symmetry, about 100'' in diameter. The radio morphology is also shell-like, but only about 84'' in diameter, based on observations made in 1985. We attribute the size difference to expansion between 1985 and our Chandra observations of 2007. Expansion is confirmed in comparing radio images from 1985 and 2008. We deduce that G1.9+0.3 is of order 100 years old… Expand

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References

SHOWING 1-10 OF 23 REFERENCES
Discovery of Non-Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN 1006?
We report on the ASCA results of a featureless X-ray spectrum from RX J1713.7—3946, a new shell-like SNR discovered with the ROSAT all-sky survey. The northwest part of RX J1713.7-3946 was in theExpand
G0.570-0.018 : A young supernova remnant? Integral and vla observations
We report INTEGRAL IBIS γ-ray and VLA radio observations of G0.570-0.018, a diffuse X-ray source recently discovered by ASCA and Chandra in the Galactic center region. Based on its spectrum andExpand
The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays
TLDR
The distribution in Galactic latitude of the detected sources appears to be consistent with a scale height in the Galactic disk for the parent population smaller than 100 pc, consistent with expectations for supernova remnants and/or pulsar wind nebulae. Expand
RX J0852.0–4622: Another Nonthermal Shell-Type Supernova Remnant (G266.2–1.2)
The newly discovered supernova remnant G266.2-1.2 (RX J0852.0-4622), along the line of sight to the Vela supernova remnant (SNR), was observed with ASCA for 120 ks. We find that the X-ray spectrum isExpand
Maximum Energies of Shock-accelerated Electrons in Young Shell Supernova Remnants
Young supernova remnants (SNRs) are often assumed to be the source of cosmic rays up to energies approaching the slight steepening in the cosmic-ray spectrum at around 1000 TeV, known as the knee. WeExpand
Two new young galactic supernova remnants
Substantial reductions1–3 in the distances inferred for the remnants of several ‘historical’ supernovae, coupled with a galactic supernova rate of 1 every 25 yrs or so4, have raised the possibility5Expand
Models of Synchrotron X-Rays from Shell Supernova Remnants
The diffusive shock acceleration process can accelerate particles to a maximum energy depending on the shock speed and age and on any competing loss processes on the particles. The shock waves ofExpand
Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
Aims. The Two Micron All Sky Survey, along with the Stellar Population Synthesis Model of the Galaxy, developed in Besancon, is used to calculate the extinction distribution along different lines ofExpand
Structure of the interstellar medium around Cas A
We present a 3 yr series of observations at 24 μm with the Spitzer Space Telescope of the interstellar material in a 200' × 200' square area centered on Cassiopeia A. Interstellar dust heated by theExpand
Supernova Remnants at High Energy
Many shell supernova remnants are now known to radiate synchrotron X-rays. Several objects have also been detected in TeV gamma rays. Nonthermal X-rays and gamma rays can be produced in shellExpand
...
1
2
3
...