EXPANSION VELOCITY OF EJECTA IN TYCHO's SUPERNOVA REMNANT MEASURED BY DOPPLER BROADENED X-RAY LINE EMISSION

@article{Hayato2010EXPANSIONVO,
  title={EXPANSION VELOCITY OF EJECTA IN TYCHO's SUPERNOVA REMNANT MEASURED BY DOPPLER BROADENED X-RAY LINE EMISSION},
  author={Asami Hayato and Hiroya Yamaguchi and Toru Tamagawa and Satoru Katsuda and Una Hwang and John P. Hughes and M. Nakajima H. Ozawa and Aya Bamba and Kenzo Kinugasa and Yukikatsu Terada and Akihiro Furuzawa and Hideyo Kunieda and K. Makishima},
  journal={The Astrophysical Journal},
  year={2010},
  volume={725},
  pages={894 - 903}
}
We show that the expansion of ejecta in Tycho's supernova remnant (SNR) is consistent with a spherically symmetric shell, based on Suzaku measurements of the Doppler broadened X-ray emission lines. All of the strong Kα line emissions show broader widths at the center than at the rim, while the centroid energies are constant across the remnant (except for Ca). This is the pattern expected for Doppler broadening due to expansion of the SNR ejecta in a spherical shell. To determine the expansion… 
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We use Suzaku observations to measure the spatial variation of the Fe Kα line with radius in the Tycho supernova remnant. The Fe line widths show a significant decrease from a FWHM value of 210 eV at
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