Direct Ejecta Velocity Measurements of Tycho's Supernova Remnant

Abstract

We present the first direct ejecta velocity measurements of Tycho's supernova remnant (SNR). Chandra's high angular resolution images reveal a patchy structure of radial velocities in the ejecta that can be separated into distinct redshifted, blueshifted, and low velocity ejecta clumps or blobs. The typical velocities of the redshifted and blueshifted blobs are <~ 7,800 km/s and <~ 5,000 km/s, respectively. The highest velocity blobs are located near the center, while the low velocity ones appear near the edge as expected for a generally spherical expansion. Systematic uncertainty on the velocity measurements from gain calibration was assessed by carrying out joint fits of individual blobs with both the ACIS-I and ACIS-S detectors. We determine the three-dimensional kinematics of the Si- and Fe-rich clumps in the southeastern quadrant and show that these knots form a distinct, compact, and kinematically-connected structure, possibly even a chain of knots strung along the remnant's edge. By examining the viewing geometries we conclude that the knots in the southeastern region are unlikely to be responsible for the high velocity Ca II absorption features seen in the light echo spectrum of SN 1572, the originating event for Tycho's SNR.

Accepted to appear in ApJ, 18 pages, 13 figures, 6 tables

References in corpus (12)

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Cited by in corpus (25)

• X-ray Measurements of the Particle Acceleration Properties at Inward Shocks in Cassiopeia A
• The Origin of the Iron-Rich Knot in Tycho's Supernova Remnant
• ${}^{44}\mathrm{Ti}$ ejecta in young supernova remnants
• The Three-Dimensional Expansion of the Ejecta from Tycho's Supernova Remnant
• From supernova to supernova remnant: comparison of thermonuclear explosion models
• Tycho-B: an unlikely companion for SN 1572
• Freely Expanding Knots of X-ray Emitting Ejecta in Kepler's Supernova Remnant
• Uncovering magnetic turbulence in young supernova remnants with polarized X-ray imaging
• Dark Matter from Monogem
• A Nucleosynthetic Origin for the Southwestern Fe-rich Structure in Kepler's Supernova Remnant
• Time Variability of Nonthermal X-ray Stripes in Tycho's Supernova Remnant with Chandra
• A fresh perspective on the 3D dynamics of Tycho's supernova remnant: Ejecta asymmetries in the X-ray band
• An Ejecta Kinematics Study of Kepler's Supernova Remnant with High-Resolution $Chandra$ HETG Spectroscopy
• The 3-D X-ray Ejecta Structure of Tycho's Supernova Remnant
• Genus Statistic Applied to the X-ray Remnant of SN 1572: Clues to the Clumpy Ejecta Structure of Type Ia Supernovae
• An explanation of the formation of the peculiar periphery of Tycho's supernova remnant
• X-ray Study of Spatial Structures in Tycho's Supernova Remnant Using Unsupervised Deep Learning
• Asymmetric Expansion of the Fe ejecta in Kepler's Supernova Remnant
• Diffusive shock acceleration at oblique high Mach number shocks
• Distance Estimate of Tycho's SNR
• Discovery of Year-Scale Time Variability from Thermal X-ray Emission in Tycho's Supernova Remnant
• Bayesian insights in Tycho supernova remnant : a detailed mapping of ejecta properties
• Transition Elements in Supernova Presolar Grains: Condensation vs. Implantation
• Comparing the three-dimensional morphological asymmetries in the ejecta of Kepler and Tycho in X-rays
• Modelling and simulations of supernova remnants: a short review focused on recent progress in morphological studies