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A High-Resolution X-Ray and Optical Study of SN 1006: Asymmetric Expansion and Small-Scale Structure in a Type Ia Supernova Remnant

Winkler, P ; Williams, Brian ; Long, Knox ; Katsuda, Satoru ; Hwang, Una Hwang, Una (pacrepositoryorg)

arXiv.org, Dec 11, 2013 [Peer Reviewed Journal]

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  • Title:
    A High-Resolution X-Ray and Optical Study of SN 1006: Asymmetric Expansion and Small-Scale Structure in a Type Ia Supernova Remnant
  • Author: Winkler, P ; Williams, Brian ; Long, Knox ; Katsuda, Satoru ; Hwang, Una
  • Hwang, Una (pacrepositoryorg)
  • Description: We introduce a deep (670 ks) X-ray survey of the SN1006 remnant from Chandra, plus a deep H-alpha image from the 4m telescope at CTIO. Comparison with Chandra images from 2003 gives the first measurement of X-ray proper motions around the entire rim. We find that the expansion velocity varies significantly with azimuth: the highest velocity of ~7400 km/s (almost 2.5 times that in the NW) is found along the SE rim, where both kinematics and spectra indicate that most of the X-rays stem from undecelerated ejecta. Asymmetries in the distribution of ejecta are seen on a variety of spatial scales. Si-rich ejecta are especially prominent in the SE quadrant, while O and Mg are more uniformly distributed, indicating large-scale asymmetries arising from the explosion itself. Ne emission is strongest in a sharp filament just behind the primary shock along the NW rim, where the preshock density is highest. Here the Ne is likely interstellar, while Ne within the shell may include a contribution from...
  • Is Part Of: arXiv.org, Dec 11, 2013
  • Identifier: E-ISSN: 2331-8422 ; DOI: 10.1088/0004-637X/781/2/65
  • Subjects: X Rays ; Skewed Distributions ; Small Scale ; Ejecta ; Emission ; Particle Acceleration ; Three Dimensional Models ; Kinematics ; Precursors ; Interstellar ; X Rays ; Supernova Remnants ; Projectiles ; Knots ; Astrophysics of Galaxies ; High Energy Astrophysical Phenomena
  • Language: English
  • Source: © ProQuest LLC All rights reserved
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