The GeV to TeV connection in the environment of SNR IC 443

Torres, D. F.; Marrero, Ana Y. Rodr ́ iguez; Pozo, E. De Cea del

doi:10.1111/j.1365-2966.2010.17205.x

Cited by 41 publications

(40 citation statements)

References 47 publications

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“…In this Letter, we demonstrate that the newly found γ -ray emission from middle-aged SNRs can be readily understood within the crushed cloud scenario in which the γ -ray emission comes from shocked clouds overrun by SNR blast waves. It should be emphasized that our model is essentially different from the scenarios adopted in the recent papers (e.g., Fujita et al 2010;Torres et al 2010), where molecular clouds in the vicinity of SNRs are assumed to be illuminated by runaway CRs (Aharonian & Atoyan 1996;Gabici et al 2009). While the GeV and TeV γ -rays outside the southern boundary of SNR W28 (Aharonian et al 2008;Giuliani et al 2010;Abdo et al 2010c) may be explained by such runaway CRs, we argue here that the luminous GeV γ -ray emission in the directions of cloudinteracting SNRs emerges from the radiatively compressed clouds.…”

Section: Introductionmentioning

confidence: 96%

Gamma-Ray Emission From Crushed Clouds in Supernova Remnants

Uchiyama

Blandford

Funk

et al. 2010

ApJ

179

260

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It is shown that the radio and gamma-ray emission observed from newly found "GeV-bright" supernova remnants (SNRs) can be explained by a model in which a shocked cloud and shock-accelerated cosmic rays (CRs) frozen in it are simultaneously compressed by the supernova blast wave as a result of formation of a radiative cloud shock. Simple reacceleration of pre-existing CRs is generally sufficient to power the observed gamma-ray emission through the decays of π 0 -mesons produced in hadronic interactions between high-energy protons (nuclei) and gas in the compressed-cloud layer. This model provides a natural account of the observed synchrotron radiation in SNRs W51C, W44, and IC 443 with flat radio spectral index, which can be ascribed to a combination of secondary and reaccelerated electrons and positrons.

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Section: Introductionmentioning

confidence: 96%

Gamma-Ray Emission From Crushed Clouds in Supernova Remnants

Uchiyama

Blandford

Funk

et al. 2010

ApJ

179

260

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“…Abdo et al (2010) summarized the locations and extensions of the γ -ray emission from IC 443 detected by different telescopes (e.g., EGRET : Hartman et al 1999;MAGIC: Albert et al 2007; VERITAS: Acciari et al 2009;and Fermi LAT: Abdo et al 2010). Based on these observations, Torres et al (2010) used two MC models to explain the GeV-TeV connection in the vicinity of SNR IC 443. Li & Chen (2012), however, used the MC (with geometric volume) model to fit the GeV-TeV spectra.…”

Section: The High-energy Emission Of Snr Ic 443mentioning

confidence: 99%

Molecular Environment of the Supernova Remnant Ic 443: Discovery of the Molecular Shells Surrounding the Remnant

Fang

Yang

et al. 2014

ApJ

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We have carried out 12 CO, 13 CO, and C 18 O observations toward the mixed morphology supernova remnant (SNR) IC 443. The observations cover a 1.• 5 × 1.• 5 area and allow us to investigate the overall molecular environment of the remnant. Some northern and northeastern partial shell structure of CO gas is around the remnant. One of the partial shells, about 5 extending beyond the northeastern border of the remnant's bright radio shell, seems to just confine the faint radio halo. On the other hand, some faint CO clumps can be discerned along the eastern boundary of the faint remnant's radio halo. Connecting the eastern CO clumps, the northeastern partial shell structures, and the northern CO partial shell, we can see that a half molecular ring structure appears to surround the remnant. The LSR velocity of the half-ring structure is in the range of −5 km s −1 to −2 km s −1 , which is consistent with that of the −4 km s −1 molecular clouds. We suggest that the half-ring structure of the CO emission at V LSR ∼ −4 km sis associated with the SNR. The structures are possibly swept up by the stellar winds of SNR IC 443's massive progenitor. Based on the Wide-field Infrared Survey Explorer and the Two Micron All Sky Survey near-IR database, 62 young stellar object (YSO) candidates are selected within the radio halo of the remnant. These YSO candidates concentrated along the boundary of the remnant's bright radio shell are likely to be triggered by the stellar winds from the massive progenitor of SNR IC 443.

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“…The region of IC 443 (FGES J0617.2+2235 and FGES J0619.6+2229): The middle-aged SNR IC 443 has been extensively studied at all wavelengths and established as a strong γ-ray source extended in the TeV band (Albert et al 2007) and in the GeV domain (Tavani et al 2010;Abdo et al 2010b). The γ-ray data were interpreted by Torres et al (2010) in the framework of CR interactions with a giant MC lying in front of the remnant. Then, using Fermi-LAT data down to 60 MeV, Ackermann et al (2013b) detected a spectral break at low energy, characteristic of pion-decay emission, proving that protons are indeed being accelerated in this remnant.…”

Section: The Pwn Hess J1857+026 (Fges J18578+0246)mentioning

confidence: 99%

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Ackermann

Ajello

Baldini

et al. 2017

ApJ

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The spatial extension of a γ-ray source is an essential ingredient to determine its spectral properties, as well as its potential multiwavelength counterpart. The capability to spatially resolve γ-ray sources is greatly improved by the newly delivered Fermi-Large Area Telescope (LAT) Pass 8 event-level analysis, which provides a greater acceptance and an improved point-spread function, two crucial factors for the detection of extended sources. Here, we present a complete search for extended sources located within 7°from the Galactic plane, using 6 yr of Fermi-LAT data above 10 GeV. We find 46 extended sources and provide their morphological and spectral characteristics. This constitutes the first catalog of hard Fermi-LAT extended sources, named the Fermi Galactic Extended Source Catalog, which allows a thorough study of the properties of the Galactic plane in the sub-TeV domain.

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The GeV to TeV connection in the environment of SNR IC 443

Cited by 41 publications

References 47 publications

Gamma-Ray Emission From Crushed Clouds in Supernova Remnants

Gamma-Ray Emission From Crushed Clouds in Supernova Remnants

Molecular Environment of the Supernova Remnant Ic 443: Discovery of the Molecular Shells Surrounding the Remnant

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

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