AN X-RAY AND RADIO STUDY OF THE VARYING EXPANSION VELOCITIES IN TYCHO’S SUPERNOVA REMNANT

@article{Williams2016ANXA,
  title={AN X-RAY AND RADIO STUDY OF THE VARYING EXPANSION VELOCITIES IN TYCHO’S SUPERNOVA REMNANT},
  author={Brian J. Williams and Laura B. Chomiuk and John W. Hewitt and John M. Blondin and Kazimierz J. Borkowski and Parviz Ghavamian and Robert Petre and Stephen P. Reynolds},
  journal={The Astrophysical Journal Letters},
  year={2016},
  volume={823}
}
We present newly obtained X-ray and radio observations of Tycho’s supernova remnant using Chandra and the Karl G. Jansky Very Large Array in 2015 and 2013/14, respectively. When combined with earlier epoch observations by these instruments, we now have time baselines for expansion measurements of the remnant of 12–15 years in the X-rays and 30 years in the radio. The remnant’s large angular size allows for proper motion measurements at many locations around the periphery of the blast wave… 
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