Doppler-Broadened Iron X-ray Lines from Tycho's Supernova Remnant

Abstract

We use \suzaku observations to measure the spatial variation of the Fe K$\alpha$ line with radius in the \tycho supernova remnant. The Fe line widths show a significant decrease from a FWHM value of 210 eV at the center to 130 eV at the rim. Over the same radial range the line center energy remains nearly constant. These observations are consistent with a scenario in which the shell of Fe-emitting ejecta in \tycho is expanding at speeds of 2800--3350 km s${}^{-1}$. The minimum line width we measure is still a factor of two larger than expected from a single component plasma emission model. If thermal Doppler broadening is the dominant additional source of broadening, we infer an ion temperature of $(1--3)\times 10^{10}$ K.

5 pages, 5 figures, To appear in ApJ Letters

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Cited by in corpus (12)

• Supernova remnants: the X-ray perspective
• Observational signatures of particle acceleration in supernova remnants
• Expansion Velocity of Ejecta in Tycho's Supernova Remnant Measured by Doppler Broadened X-ray Line Emission
• X-Ray Measured Dynamics of Tycho's Supernova Remnant
• On the electron-ion temperature ratio established by collisionless shocks
• Direct Ejecta Velocity Measurements of Tycho's Supernova Remnant
• The Three-Dimensional Expansion of the Ejecta from Tycho's Supernova Remnant
• XMM-Newton observations of SNR 1987A. II. The still increasing X-ray light curve and the properties of Fe K lines
• Origin of the dust emission from Tycho's SNR
• The Single-degenerate Binary Origin of Tycho's Supernova as Traced by the Stripped Envelope of the Companion
• Asymmetric Expansion of the Fe ejecta in Kepler's Supernova Remnant
• Kinematics of Supernova Remnants: Status of X-Ray Observations