XMM-Newton large program on SN1006 - I. Methods and initial results of spatially resolved spectroscopy

Marco Miceli, Anne Decourchelle, Marco Miceli, Jacco Vink, Jiang-Tao Li, Fabrizio Bocchino

Risultato della ricerca: Article

12 Citazioni (Scopus)

Abstract

Based on our newly developed methods and the XMM-Newton large program of SN1006, we extract and analyse the spectra from 3596 tessellated regions of this supernova remnant (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_et), 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$t, and model them with several Gaussians, in order to characterize the average thermal and ionization states of such an extended source. We construct equivalent width (EW) maps based on continuum interpolation with the spectral model of each region. We then compare the EW maps of O VII, O VIII, O VII K$\delta$ - $\zeta$, Ne, Mg, Si XIII, Si XIV, 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 centre. This `O hole' has enhanced O VII K$\delta$ - $\zeta$ and Fe emissions, indicating recently reverse shocked ejecta, but also has the highest n$_e$t, indicating forward shocked interstellar medium (ISM). Therefore, a multitemperature model is needed to decompose these components. The asymmetric metal distributions suggest there is either an asymmetric explosion of the supernova or an asymmetric distribution of the ISM.
Lingua originaleEnglish
pagine (da-a)3953-3974
Numero di pagine22
RivistaMonthly Notices of the Royal Astronomical Society
Volume453
Stato di pubblicazionePublished - 2015

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XMM-Newton telescope
newton
ionization
spectroscopy
supernova remnants
interpolation
cut-off
probability distribution functions
electron density
explosions
explosion
metal ions
x rays
radio
slopes
ion
metal
programme
method
temperature

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

XMM-Newton large program on SN1006 - I. Methods and initial results of spatially resolved spectroscopy. / Miceli, Marco; Decourchelle, Anne; Miceli, Marco; Vink, Jacco; Li, Jiang-Tao; Bocchino, Fabrizio.

In: Monthly Notices of the Royal Astronomical Society, Vol. 453, 2015, pag. 3953-3974.

Risultato della ricerca: Article

Miceli, Marco ; Decourchelle, Anne ; Miceli, Marco ; Vink, Jacco ; Li, Jiang-Tao ; Bocchino, Fabrizio. / XMM-Newton large program on SN1006 - I. Methods and initial results of spatially resolved spectroscopy. In: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 453. pagg. 3953-3974.
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abstract = "Based on our newly developed methods and the XMM-Newton large program of SN1006, we extract and analyse the spectra from 3596 tessellated regions of this supernova remnant (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_et), 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$t, and model them with several Gaussians, in order to characterize the average thermal and ionization states of such an extended source. We construct equivalent width (EW) maps based on continuum interpolation with the spectral model of each region. We then compare the EW maps of O VII, O VIII, O VII K$\delta$ - $\zeta$, Ne, Mg, Si XIII, Si XIV, 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 centre. This `O hole' has enhanced O VII K$\delta$ - $\zeta$ and Fe emissions, indicating recently reverse shocked ejecta, but also has the highest n$_e$t, indicating forward shocked interstellar medium (ISM). Therefore, a multitemperature model is needed to decompose these components. The asymmetric metal distributions suggest there is either an asymmetric explosion of the supernova or an asymmetric distribution of the ISM.",
keywords = "acceleration of particles, shock waves, methods: data analysis, cosmic rays, ISM: supernova remnants, X-rays: ISM",
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T1 - XMM-Newton large program on SN1006 - I. Methods and initial results of spatially resolved spectroscopy

AU - Miceli, Marco

AU - Decourchelle, Anne

AU - Miceli, Marco

AU - Vink, Jacco

AU - Li, Jiang-Tao

AU - Bocchino, Fabrizio

PY - 2015

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N2 - Based on our newly developed methods and the XMM-Newton large program of SN1006, we extract and analyse the spectra from 3596 tessellated regions of this supernova remnant (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_et), 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$t, and model them with several Gaussians, in order to characterize the average thermal and ionization states of such an extended source. We construct equivalent width (EW) maps based on continuum interpolation with the spectral model of each region. We then compare the EW maps of O VII, O VIII, O VII K$\delta$ - $\zeta$, Ne, Mg, Si XIII, Si XIV, 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 centre. This `O hole' has enhanced O VII K$\delta$ - $\zeta$ and Fe emissions, indicating recently reverse shocked ejecta, but also has the highest n$_e$t, indicating forward shocked interstellar medium (ISM). Therefore, a multitemperature model is needed to decompose these components. The asymmetric metal distributions suggest there is either an asymmetric explosion of the supernova or an asymmetric distribution of the ISM.

AB - Based on our newly developed methods and the XMM-Newton large program of SN1006, we extract and analyse the spectra from 3596 tessellated regions of this supernova remnant (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_et), 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$t, and model them with several Gaussians, in order to characterize the average thermal and ionization states of such an extended source. We construct equivalent width (EW) maps based on continuum interpolation with the spectral model of each region. We then compare the EW maps of O VII, O VIII, O VII K$\delta$ - $\zeta$, Ne, Mg, Si XIII, Si XIV, 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 centre. This `O hole' has enhanced O VII K$\delta$ - $\zeta$ and Fe emissions, indicating recently reverse shocked ejecta, but also has the highest n$_e$t, indicating forward shocked interstellar medium (ISM). Therefore, a multitemperature model is needed to decompose these components. The asymmetric metal distributions suggest there is either an asymmetric explosion of the supernova or an asymmetric distribution of the ISM.

KW - acceleration of particles, shock waves, methods: data analysis, cosmic rays, ISM: supernova remnants, X-rays: ISM

UR - http://hdl.handle.net/10447/165819

M3 - Article

VL - 453

SP - 3953

EP - 3974

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

ER -