Related papers: Neutral iron line in the supernova remnant IC 443 …

Evidence for a neutral iron line generated by MeV protons from supernova remnants interacting with molecular clouds

Supernova remnants (SNRs) have been prime candidates for Galactic cosmic-ray accelerators. When low-energy cosmic-ray protons (LECRp) collide with interstellar gas, they ionize neutral iron atoms and emit the neutral iron line (Fe I…

High Energy Astrophysical Phenomena · Physics 2018-02-28 Kumiko K. Nobukawa , Masayoshi Nobukawa , Katsuji Koyama , Shigeo Yamauchi , Hideki Uchiyama , Hiromichi Okon , Takaaki Tanaka , Hiroyuki Uchida , Takeshi G. Tsuru

Interaction between Molecular Clouds and MeV-TeV Cosmic-ray Protons Escaped from Supernova Remnants

Recent discovery of the X-ray neutral iron line (Fe I K\alpha at 6.40 keV) around several supernova remnants (SNRs) show that MeV cosmic-ray (CR) protons are distributed around the SNRs and are interacting with neutral gas there. We propose…

High Energy Astrophysical Phenomena · Physics 2019-08-27 Ken Makino , Yutaka Fujita , Kumiko Nobukawa , Hironori Matsumoto , Yutaka Ohira

Detection of the neutral iron line from the supernova remnant W49B with Suzaku

Recent studies of supernova remnants (SNRs) have revealed that some SNRs exhibit a neutral iron line emission at 6.4 keV. This line has been proposed to originate from the interaction of high-energy particles formed in the SNR shell with…

High Energy Astrophysical Phenomena · Physics 2024-01-17 Nari Suzuki , Shigeo Yamauchi , Kumiko K. Nobukawa , Masayoshi Nobukawa , Satoru Katsuda

Direct Evidence for Hadronic Cosmic-Ray Acceleration in the Supernova Renmant IC 443

The Supernova Remnant (SNR) IC 443 is an intermediate-age remnant well known for its radio, optical, X-ray and gamma-ray energy emissions. In this Letter we study the gamma-ray emission above 100 MeV from IC 443 as obtained by the AGILE…

High Energy Astrophysical Phenomena · Physics 2015-05-18 M. Tavani , A. Giuliani , A. W. Chen , A. Argan , G. Barbiellini , A. Bulgarelli , P. Caraveo , P. W. Cattaneo , V. Cocco , T. Contessi , F. D'Ammando , E. Costa , G. De Paris , E. Del Monte , G. Di Cocco , I. Donnarumma , Y. Evangelista , A. Ferrari , M. Feroci , F. Fuschino , M. Galli , F. Gianotti , C. Labanti , I. Lapshov , F. Lazzarotto , P. Lipari , F. Longo , M. Marisaldi , M. Mastropietro , S. Mereghetti , E. Morelli , E. Moretti , A. Morselli , L. Pacciani , A. Pellizzoni , F. Perotti , G. Piano , P. Picozza , M. Pilia , G. Pucella , M. Prest , M. Rapisarda , A. Rappoldi , E. Scalise , A. Rubini , S. Sabatini , E. Striani , P. Soffitta , M. Trifoglio , A. Trois , E. Vallazza , S. Vercellone , V. Vittorini , A. Zambra , D. Zanello , C. Pittori , F. Verrecchia , P. Santolamazza , P. Giommi , S. Colafrancesco , L. A. Antonelli , L. Salotti

Suzaku spectra of a Type II Supernova Remnant Kes 79

This paper reports results of a Suzaku observation of the supernova remnant (SNR) Kes 79 (G33.6+0.1). The X-ray spectrum is best fitted by a two-temperature model: a non-equilibrium ionization (NEI) plasma and a collisional ionization…

High Energy Astrophysical Phenomena · Physics 2016-01-20 Tamotsu Sato , Katsuji Koyama , Shiu-Hang Lee , Tadayuki Takahashi

Analysis of the Supernova Remnant IC 443 using H.E.S.S. Data

IC 443 is a well-known supernova remnant that stands out due to its interaction with a dense molecular cloud, creating a complex environment where shocks can efficiently accelerate particles to high energies. This makes it a key target for…

High Energy Astrophysical Phenomena · Physics 2025-10-06 Alison M. W. Mitchell , Lukas Grosspietsch , Tina Wach

Probing Cosmic Rays with Fe K$\alpha$ Line Structures Generated by Multiple Ionization Process

Supernova remnants (SNRs) have been regarded as major acceleration sites of Galactic cosmic rays. Recent X-ray studies revealed neutral Fe K$\alpha$ line emission from dense gas in the vicinity of some SNRs, which can be best interpreted as…

High Energy Astrophysical Phenomena · Physics 2020-06-24 Hiromichi Okon , Makoto Imai , Takaaki Tanaka , Hiroyuki Uchida , Takeshi Go Tsuru

Study of the IC 443 region with the HAWC observatory

Supernova remnants are one potential source class considered a PeVatron (i.e. capable of accelerating cosmic rays above PeV energies). The shock fronts produced after the explosion of the supernova are ideal regions for particle…

High Energy Astrophysical Phenomena · Physics 2025-08-07 R. Alfaro , C. Alvarez , M. Araya , J. C. Arteaga-Velázquez , D. Avila Rojas , H. A. Ayala Solares , R. Babu , A. Bernal , K. S. Caballero-Mora , T. Capistran , A. Carramiñana , S. Casanova , U. Cotti , J. Cotzomi , S. Coutiño de León , E. De la Fuente , D. Depaoli , P. Desiati , N. Di Lalla , R. Diaz Hernandez , B. L. Dingus , M. A. DuVernois , J. C. Díaz-Vélez , T. Ergin , C. Espinoza , K. Fang , N. Fraija , S. Fraija , J. A. García-González , H. Goksu , J. A. González-Cervera , M. M. González , J. A. Goodman , S. Groetsch , J. P. Harding , S. Hernández-Cadena , I. Herzog , J. Hinton , D. Huang , F. Hueyotl-Zahuantitla , P. Hüntemeyer , S. Kaufmann , A. Lara , J. Lee , H. León Vargas , J. T. Linnemann , A. L. Longinotti , G. Luis-Raya , K. Malone , O. Martinez , J. Martínez-Castro , J. A. Matthews , P. Miranda-Romagnoli , J. A. Montes , J. A. Morales-Soto , E. Moreno , M. Mostafá , M. Najafi , L. Nellen , M. U. Nisa , R. Noriega-Papaqui , L. Olivera-Nieto , N. Omodei , M. Osorio , E. Ponce , Y. Pérez Araujo , E. G. Pérez-Pérez , C. D. Rho , D. Rosa-González , M. Roth , E. Ruiz-Velasco , H. Salazar , A. Sandoval , M. Schneider , G. Schwefer , J. Serna-Franco , A. J. Smith , Y. Son , R. W. Springer , O. Tibolla , K. Tollefson , I. Torres , R. Torres-Escobedo , R. Turner , X. Wang , Z. Wang , I. J. Watson , H. Wu , S. Yu , S. Yun-Cárcamo , H. Zhou , C. de León

A Possible Site of Cosmic Ray Acceleration in the Supernova Remnant IC 443

We present evidence for shock acceleration of cosmic rays to high energies (about 10 TeV) in the supernova remnant IC 443. X-ray imaging spectroscopy with ASCA reveals two regions of particularly hard emission: an unresolved source embedded…

Astrophysics · Physics 2009-10-30 Jonathan W. Keohane , R. Petre , E. V. Gotthelf , M. Ozaki , K. Koyama

The TeV Morphology of the Interacting Supernova Remnant IC 443

The middle-aged supernova remnant IC 443 is interacting with molecular gas in its surroundings. $Fermi$-LAT has established that its gamma-ray emission at low energies shows the "pion bump" that is characteristic of hadronic emission. TeV…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Brian Humensky

Evidence of cosmic-ray acceleration up to sub-PeV energies in the supernova remnant IC 443

Supernova remnants (SNRs) have been considered as the primary contributors to cosmic rays (CRs) in our Galaxy. However, the maximum energy of particles that can be accelerated by shocks of SNRs is uncertain, and SNRs' contribution to CRs…

High Energy Astrophysical Phenomena · Physics 2026-03-09 Zhen Cao , F. Aharonian , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , W. Bian , A. V. Bukevich , C. M. Cai , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , A. M. Chen , E. S. Chen , G. H. Chen , H. X. Chen , Liang Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. B. Chen , X. J. Chen , Y. Chen , N. Cheng , Y. D. Cheng , M. C. Chu , M. Y. Cui , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , Y. X. Diao , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , J. H. Fang , K. Fang , C. F. Feng , H. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. Feng , Y. L. Feng , S. Gabici , B. Gao , C. D. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , T. T. Ge , L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , J. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , O. A. Hannuksela , M. Hasan , H. H. He , H. N. He , J. Y. He , X. Y. He , Y. He , S. Hernández-Cadena , B. W. Hou , C. Hou , X. Hou , H. B. Hu , S. C. Hu , C. Huang , D. H. Huang , J. J. Huang , T. Q. Huang , W. J. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Y. Y. Huang , X. L. Ji , H. Y. Jia , K. Jia , H. B. Jiang , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , S. Kaci , M. M. Kang , I. Karpikov , D. Khangulyan , D. Kuleshov , K. Kurinov , B. B. Li , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , Jian Li , Jie Li , K. Li , L. Li , R. L. Li , S. D. Li , T. Y. Li , W. L. Li , X. R. Li , Xin Li , Y. Li , Y. Z. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , D. B. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. R. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , X. Liu , Y. Liu , Y. Liu , Y. N. Liu , Y. Q. Lou , Q. Luo , Y. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , Z. Min , W. Mitthumsiri , G. B. Mou , H. J. Mu , A. Neronov , K. C. Y. Ng , M. Y. Ni , L. Nie , L. J. Ou , P. Pattarakijwanich , Z. Y. Pei , J. C. Qi , M. Y. Qi , J. J. Qin , A. Raza , C. Y. Ren , D. Ruffolo , A. Sáiz , D. Semikoz , L. Shao , O. Shchegolev , Y. Z. Shen , X. D. Sheng , Z. D. Shi , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , D. X. Sun , H. Sun , Q. N. Sun , X. N. Sun , Z. B. Sun , N. H. Tabasam , J. Takata , P. H. T. Tam , H. B. Tan , Q. W. Tang , R. Tang , Z. B. Tang , W. W. Tian , C. N. Tong , L. H. Wan , C. Wang , G. W. Wang , H. G. Wang , J. C. Wang , K. Wang , Kai Wang , Kai Wang , L. P. Wang , L. Y. Wang , L. Y. Wang , R. Wang , W. Wang , X. G. Wang , X. J. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Z. H. Wang , Z. X. Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , S. S. Weng , C. Y. Wu , H. R. Wu , Q. W. Wu , S. Wu , X. F. Wu , Y. S. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , Y. L. Xin , Y. Xing , D. R. Xiong , Z. Xiong , D. L. Xu , R. F. Xu , R. X. Xu , W. L. Xu , L. Xue , D. H. Yan , T. Yan , C. W. Yang , C. Y. Yang , F. F. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , W. X. Yang , Z. H. Yang , Z. G. Yao , X. A. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , X. T. Zeng , M. Zha , B. B. Zhang , B. T. Zhang , C. Zhang , F. Zhang , H. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , Li Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. R. Zhang , S. S. Zhang , W. Y. Zhang , X. Zhang , X. P. Zhang , Yi Zhang , Yong Zhang , Z. P. Zhang , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , X. H. Zhao , Z. H. Zhao , F. Zheng , W. J. Zhong , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , X. X. Zhou , B. Y. Zhu , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , Y. C. Zou , X. Zuo

Large-area [Fe II] Line Mapping of the Supernova Remnant IC443 with the IRSF/SIRIUS

We present the result of near-infrared (near-IR) [Fe II] line mapping of the supernova remnant IC443 with the IRSF/SIRIUS, using the two narrow-band filters tuned for the [Fe II] 1.257 micron and [Fe II] 1.644 micron lines. Covering a large…

Astrophysics of Galaxies · Physics 2015-06-15 Takuma Kokusho , Takahiro Nagayama , Hidehiro Kaneda , Daisuke Ishihara , Ho-Gyu Lee , Takashi Onaka

Suzaku study on the Ejecta of the Supernova Remnant G272.2$-$3.2

We report re-analyses of the Suzaku observations of the Galactic supernova remnant (SNR), G272.2$-$3.2, for which the previous studies were limited below 3 keV. With careful data reduction and background subtraction, we discover the K-shell…

High Energy Astrophysical Phenomena · Physics 2015-12-02 Fumiyoshi Kamitsukasa , Katsuji Koyama , Hiroshi Nakajima , Kiyoshi Hayashida , Koji Mori , Satoru Katsuda , Hiroyuki Uchida , Hiroshi Tsunemi

Observation of Supernova Remnant IC443 with the Fermi Large Area Telescope

We report observation of the supernova remnant IC443 (G189.1+3.0) with the Fermi Gamma-ray Space Telescope Large Area Telescope (LAT) in the energy band between 200MeV and 50GeV. IC443 is a shell-type supernova remnant with mixed morphology…

High Energy Astrophysical Phenomena · Physics 2015-05-18 A. A. Abdo

ISO-SWS spectroscopy of IC443 and the origin of the IRAS 12 and 25 micron emission from radiative supernova remnants

ISO-SWS spectral observations of the supernova remnant IC443 are presented. Like other radiative SNRs, this object is characterized by prominent line-emitting filaments and relatively strong IRAS 12 and 25 micron emission which is commonly…

Astrophysics · Physics 2007-05-23 E. Oliva , D. Lutz , S. Drapatz , A. F. M. Moorwood

A Suzaku Observation of the Low-Ionization Fe-Line Emission from RCW 86

The newly operational X-ray satellite Suzaku observed the southwestern quadrant of the supernova remnant (SNR) RCW 86 in February 2006 to study the nature of the 6.4 keV emission line first detected with the Advanced Satellite for Cosmology…

Astrophysics · Physics 2008-11-26 Masaru Ueno , Rie Sato , Jun Kataoka , Aya Bamba , Ilana Harrus , Junko Hiraga , John P. Hughes , Caroline A. Kilbourne , Katsuji Koyama , Motohide Kokubun , Hiroshi Nakajima , Masanobu Ozaki , Robert Petre , Tadayuki Takahashi , Takaaki Tanaka , Hiroshi Tomida , Hiroya Yamaguchi

Discovery of Enhanced Radiative Recombination Continua of He-like Iron and Calcium from IC 443 and Its Implications

We present deep observations of the Galactic supernova remnant IC 443 with the {\it Suzaku X-ray satellite}. We find prominent K-shell lines from iron and nickel, together with a triangle residual at 8--10~keV, which corresponds to the…

High Energy Astrophysical Phenomena · Physics 2014-03-25 Takao Ohnishi , Hiroyuki Uchida , Takeshi Go Tsuru , Katsuji Koyama , Kuniaki Masai , Makoto Sawada

Supernova remnants as cosmic ray accelerators. SNR IC 443

We examine the hypothesis that some supernova remnants (SNRs) may be responsible for some unidentified gamma-ray sources detected by EGRET instrument aboard the Compton Gamma Ray Observatory. If this is the case, gamma-rays are produced via…

Astrophysics · Physics 2007-05-23 B. Hnatyk , O. Petruk

Isolated X-ray -- infrared sources in the region of interaction of the supernova remnant IC 443 with a molecular cloud

The nature of the extended hard X-ray source XMMU J061804.3+222732 and its surroundings is investigated using XMM-Newton, Chandra, and Spitzer observations. This source is located in an interaction region of the IC 443 supernova remnant…

Astrophysics · Physics 2009-11-13 A. M. Bykov , A. M. Krassilchtchikov , Yu. A. Uvarov , H. Bloemen , F. Bocchino , G. M. Dubner , E. B. Giacani , G. G. Pavlov

Elemental Abundances in the Possible Type Ia Supernova Remnant G344.7-0.1

Recent studies on the Galactic supernova remnant (SNR) G344.7-0.1 have commonly claimed its origin to be a core-collapse supernova (SN) explosion, based on its highly asymmetric morphology and/or proximity to a star forming region. In this…

High Energy Astrophysical Phenomena · Physics 2015-06-04 Hiroya Yamaguchi , Masaomi Tanaka , Keiichi Maeda , Patrick O. Slane , Adam Foster , Randall K. Smith , Satoru Katsuda , Rie Yoshii