XMM-Newton study of hard X-ray sources in IC 443

Bocchino, F.; Bykov, A. M.

doi:10.1051/0004-6361:20021858

Cited by 32 publications

(35 citation statements)

References 27 publications

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“…There are several XMM-Newton sources overlapping with the strong 13 CO line emission region. Such X-ray morphology is similar to that of another middle-aged SNR IC443 ( 3 10 4 t~´years) harboring a prominent SNR-cloud interaction site with a dozen X-ray sources (Bocchino & Bykov 2003).…”

Section: The Nature Of the Field Sources N1 N2 N3supporting

confidence: 61%

NuSTAR Hard X-Ray Observation of the Gamma-Ray Binary Candidate HESS J1832–093

Mori

Gotthelf

Hailey

et al. 2017

ApJ

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We present a hard X-ray observation of the TeV gamma-ray binary candidate HESSJ1832−093, which is coincident with the supernova remnant G22.7−0.2,using the Nuclear Spectroscopic Telescope Array. Nonthermal X-ray emission from XMMUJ183245−0921539, the X-ray source associated with HESSJ1832−093, is detected up to ∼30keV and is well-described by an absorbed power-law model with a best-fit photon indexA re-analysis of archival Chandra and XMM-Newton data finds that the long-term X-ray flux increase of XMMUJ183245−0921539 is 50 % 20 40 -+ (90% C.L.), much less than previously reported. A search for a pulsar spin period or binary orbit modulation yields no significant signal to a pulse fraction limit of f 19% p < in the range 4ms P 40 < < ks. No red noise is detected in the FFT power spectrum to suggest active accretion from a binary system. While further evidence is required, we argue that the X-ray and gamma-ray properties of XMMUJ183245−0921539 are most consistent with a non-accreting binary generating synchrotron X-rays from particle acceleration in the shock formed as a result of the pulsar and stellar wind collision. We also report on three nearby hard X-ray sources, one of which may be associated with diffuse emission from a fast-moving supernova fragment interacting with a dense molecular cloud.

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Section: The Nature Of the Field Sources N1 N2 N3supporting

confidence: 61%

NuSTAR Hard X-Ray Observation of the Gamma-Ray Binary Candidate HESS J1832–093

Mori

Gotthelf

Hailey

et al. 2017

ApJ

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“…Evidence for ejecta in IC 443 also exists in the form of compact knots of X-ray emitting material (Bocchino and Bykov 2003). The observed hard spectra and enhanced abundances suggest that these may be fast-moving knots of ejecta traveling into dense molecular material and producing Kα emission accompanied by nonthermal bremsstrahlung (NTB) emission from shock-accelerated electrons (Bykov 2002).…”

Section: Abundances and Nonthermal Emissionmentioning

confidence: 99%

Supernova Remnants Interacting with Molecular Clouds: X-Ray and Gamma-Ray Signatures

et al. 2014

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The giant molecular clouds (MCs) found in the Milky Way and similar galaxies play a crucial role in the evolution of these systems. The supernova explosions that mark the death of massive stars in these regions often lead to interactions between the supernova remnants (SNRs) and the clouds. These interactions have a profound effect on our understanding of SNRs. Shocks in SNRs should be capable of accelerating particles to cosmic ray (CR) energies with efficiencies high enough to power Galactic CRs. X-ray and γ-ray studies have established the presence of relativistic electrons and protons in some SNRs and provided strong evidence for diffusive shock acceleration as the primary acceleration mechanism, including strongly amplified magnetic fields, temperature and ionization effects on the shock-heated plasmas, and modifications to the dynamical evolution of some systems. Because protons dominate the overall energetics of the CRs, it is crucial to understand this hadronic component even though electrons are much more efficient radiators and it can be difficult to identify the hadronic component. However, near MCs the densities are sufficiently high to allow the γ-ray emission to be dominated by protons. Thus, these interaction sites provide some of our best opportunities to constrain the overall energetics of these particle accelerators. Here we summarize some key properties of interactions between SNRs and MCs, with an emphasis on recent X-ray and γ-ray studies that are providing important constraints on our understanding of cosmic rays in our Galaxy.

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“…It is also a source of TeV gamma-rays (Albert et al 2007). Hard X-ray sources in IC 443 related to shocked clumps have been detected by Bocchino & Bykov (2000) and studied in greater detail by Bocchino & Bykov (2003), Bykov et al (2005), Bocchino et al (2008), and Bykov et al (2008). A&A 541, A152 (2012) Motivated by the results obtained in the SNR IC 443, we started an observational campaign to detect fast fragments in SNRs interacting with molecular clouds.…”

Section: Introductionmentioning

confidence: 99%

A population of isolated hard X-ray sources near the supernova remnant Kes 69

Bocchino¹,

Bykov²,

Chen³

et al. 2012

A&A

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Recent X-ray observations of the supernova remnant (SNR) IC 443 interacting with molecular clouds detected a new population of hard X-ray sources related to the remnant itself, which has been proposed to be fast ejecta fragments propagating within the dense environment. Encouraged by these studies, we obtained a deep XMM-Newton observation of the SNR Kes 69, which also shows signs of a shock-cloud interaction. We report on the detection of 18 hard X-ray sources in the field of Kes 69, which is a number sognificantly higher than expected for the Galactic source population in the field. The sources are spatially correlated with CO emission from the cloud in the remnant environment. The spectra of 3 of the 18 sources can be described as hard power-laws with photon indices smaller than two plus line emission associated with K-shell transitions. We discuss the two most promising scenarios for the interpretation of the sources, namely fast ejecta fragments (as in IC 443) and cataclysmic variables. While most of the observational evidence is consistent with the former interpretation, we cannot rule out the latter.

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XMM-Newton study of hard X-ray sources in IC 443

Cited by 32 publications

References 27 publications

NuSTAR Hard X-Ray Observation of the Gamma-Ray Binary Candidate HESS J1832–093

NuSTAR Hard X-Ray Observation of the Gamma-Ray Binary Candidate HESS J1832–093

Supernova Remnants Interacting with Molecular Clouds: X-Ray and Gamma-Ray Signatures

A population of isolated hard X-ray sources near the supernova remnant Kes 69

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