XMM-Newton Large Program on SN1006 - I: Methods and Initial Results of Spatially-Resolved Spectroscopy

Abstract

Based on our newly developed methods and the XMM-Newton large program of SN1006, we extract and analyze the spectra from 3596 tessellated regions of this SNR each with 0.3-8 keV counts $>10^4$. For the first time, we map out multiple physical parameters, such as the temperature ($kT$), electron density ($n_e$), ionization parameter ($n_{e}t$), ionization age ($t_{ion}$), metal abundances, as well as the radio-to-X-ray slope ($\alpha$) and cutoff frequency (${\nu }_{cutoff}$) of the synchrotron emission. We construct probability distribution functions of $kT$ and $n_{e}t$, and model them with several Gaussians, in order to characterize the average thermal and ionization states of such an extended source. We construct equivalent width (EW) maps based on continuum interpolation with the spectral model of each regions. We then compare the EW maps of OVII, OVIII, OVII K$\delta -\zeta$, Ne, Mg, SiXIII, SiXIV, and S lines constructed with this method to those constructed with linear interpolation. We further extract spectra from larger regions to confirm the features revealed by parameter and EW maps, which are often not directly detectable on X-ray intensity images. For example, O abundance is consistent with solar across the SNR, except for a low-abundance hole in the center. This "O Hole" has enhanced OVII K$\delta -\zeta$ and Fe emissions, indicating recently reverse shocked ejecta, but also has the highest $n_{e}t$, indicating forward shocked ISM. Therefore, a multi-temperature model is needed to decompose these components. The asymmetric metal distributions suggest there is either an asymmetric explosion of the SN or an asymmetric distribution of the ISM.

25 pages, 18 figures, 4 tables, MNRAS, in press

References in corpus (11)

• First detection of VHE gamma-rays from SN 1006 by H.E.S.S
• Chandra's View of the Ram Pressure Stripped Galaxy M86
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• A high resolution UV absorption spectrum of supernova ejecta in SN1006
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• Scientific Objectives of the Hot Universe Baryon Surveyor (HUBS) Mission
• An Expanding Shell of Neutral Hydrogen Associated with SN 1006: Hints for the Single-Degenerate Origin and Faint Hadronic Gamma-Rays
• Spatially resolved broad-band synchrotron emission from the non-thermal limbs of SN1006
• Spatially Resolved X-ray Spectroscopy of Kepler's Supernova Remnant: Distinct Properties of the Circumstellar Medium and the Ejecta
• A Deep X-ray View of the Synchrotron-Dominated Supernova Remnant G330.2+1.0
• Simulating TeV gamma-ray morphologies of shell-type supernova remnants
• XMM-Newton Large Program on SN1006 - II: Thermal Emission
• Feature-tailored spectroscopic analysis of the SNR Puppis A in X-rays
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