Related papers: Suzaku X-Ray Imaging and Spectroscopy of Cassiopei…

High spatial resolution X-ray spectroscopy of SNR Cassiopeia A with {\sl Chandra}

We present high spatial resolution X-ray spectroscopy of supernova remnant Cassiopeia A with the {\sl Chandra} observations. The X-ray emitting region of this remnant was divided into 38 $\times$ 34 pixels with a scale of 10$\arcsec$…

Astrophysics · Physics 2009-11-13 Xue-juan Yang , Fang-jun Lu , Li Chen

Study of Nonthermal Emission from SNR RX J1713.7-3946 with Suzaku

We present results obtained from a series of observations of the supernova remnant RX J1713.7-3946 by the Suzaku satellite. The observations cover about two-thirds of the remnant surface. We successfully detected hard X-rays up to ~ 40 keV…

Astrophysics · Physics 2009-11-13 Takaaki Tanaka , Yasunobu Uchiyama , Felix A. Aharonian , Tadayuki Takahashi , Aya Bamba , Junko S. Hiraga , Jun Kataoka , Tetsuichi Kishishita , Motohide Kokubun , Koji Mori , Kazuhiro Nakazawa , Robert Petre , Hiroyasu Tajima , Shin Watanabe

Kinematics of X-ray Emitting Components in Cassiopeia A

We present high-resolution X-ray proper motion measurements of Cassiopeia A using Chandra observations from 2000 and 2002. We separate the emission into four spectrally distinct classes: Si-dominated, Fe-dominated, low-energy-enhanced, and…

Astrophysics · Physics 2009-11-10 T. DeLaney , L. Rudnick , R. Fesen , T. W. Jones , R. Petre , J. A. Morse

Separating Thermal and Nonthermal X-Rays in Supernova Remnants I: Total Fits to SN 1006 AD

The remnant of SN 1006 has an X-ray spectrum dominated by nonthermal emission, and pre-ASCA observations were well described by a synchrotron calculation with electron energies limited by escape. We describe the results of a much more…

Astrophysics · Physics 2009-10-31 K. K. Dyer , S. P. Reynolds , K. J. Borkowski , G. E. Allen , R. Petre

Broadband $\gamma$-ray spectrum of supernova remnant Cassiopeia A

The core-collapse supernova remnant (SNR) Cassiopeia A (Cas A) is one of the brightest galactic radio sources with an angular radius of $\sim$ 2.5 $\arcmin$. Although no extension of this source has been detected in the $\gamma$-ray band,…

High Energy Astrophysical Phenomena · Physics 2025-02-10 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 , 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 , Y. K. Hor , 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. 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 , Y. C. Nan , 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 , M. Saeed , 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 , H. H. 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 , J. Z. Yan , T. Yan , C. W. Yang , C. Y. Yang , F. F. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , W. X. Yang , Y. H. Yao , Z. G. Yao , X. A. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , M. Zha , B. B. Zhang , B. T. 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

On the gamma-ray fluxes expected from Cassiopeia A

Based on the results of our previous study of the broad band synchrotron emission of Cas A in the framework of a spatial inhomogeneous model, we calculate the fluxes of gamma-radiation that can be expected from this supernova remnant in…

Astrophysics · Physics 2007-05-23 A. M. Atoyan , F. A. Aharonian , R. J. Tuffs , H. J. Voelk

Super-hard X-Ray Emission from eta Carinae Observed with Suzaku

We present the Suzaku results of eta Carinae in the 5--50 keV range conducted twice around the apastron in 2005 August for 50 ks and in 2006 February for 20 ks. The X-ray Imaging Spectrometer (XIS) produced hard (5--12 keV) band spectra,…

Solar and Stellar Astrophysics · Physics 2015-05-13 Akiko Sekiguchi , Masahiro Tsujimoto , Shunji Kitamoto , Manabu Ishida , Kenji Hamaguchi , Hideyuki Mori , Yohko Tsuboi

Accelerated Electrons in Cassiopeia A: Thermal and Electromagnetic Effects

We consider in more detail a model previously proposed for the hard X-ray (>10 keV) emission observed from the supernova remnant Cas A, whereby electrons are accelerated by lower-hybrid waves and radiate bremsstrahlung. We consider both…

Astrophysics · Physics 2009-11-07 J. Martin Laming

Probing Shock Properties with Non-thermal X-ray Filaments in Cas A

Thin non-thermal X-ray filaments are often seen in young supernova remnants. We used data from the 1 Ms Chandra observation of Cassiopeia A to study spectral properties of some of the filaments in this remnant. For all the cases that we…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Miguel Araya , David Lomiashvili , Chulhoon Chang , Maxim Lyutikov , Wei Cui

New X-ray views of the Galactic center observed with Suzaku

We report the diffuse X-ray emissions from the Sgr A and B regions observed with Suzaku. From the Sgr A region, we found many K-shell transition lines of iron and nickel. The brightest are K alpha lines from FeI, FeXXV and FeXXVI at 6.4…

Astrophysics · Physics 2008-11-26 Katsuji Koyama , Yoshiaki Hyodo , Tatsuya Inui

Origin of gamma-ray emission in the shell of Cassiopeia A

Non-thermal X-ray emission from the shell of Cassiopeia A (Cas A) has been an interesting subject of study, as it provides information about relativistic electrons and their acceleration mechanisms in the shocks. Chandra X-ray observatory…

High Energy Astrophysical Phenomena · Physics 2018-03-08 L. Saha , T. Ergin , P. Majumdar , M. Bozkurt , E. N. Ercan

XRISM Observations of Cassiopeia A: Overview, Atomic Data, and Spectral Models

Cassiopeia A (Cas A) is the youngest known core-collapse supernova remnant (SNR) in the Galaxy and is perhaps the best-studied SNR in X-rays. Cas A has a line-rich spectrum dominated by thermal emission and given its high flux, it is an…

High Energy Astrophysical Phenomena · Physics 2025-08-26 Paul Plucinsky , Manan Agarwal , Liyi Gu , Adam Foster , Toshiki Sato , Aya Bamba , Jacco Vink , Masahiro Ichihashi , Kai Matsunaga , Koji Mori , Hiroshi Nakajima , Frederick Porter , Haruto Sonoda , Shunsuke Suzuki , Dai Tateishi , Yukikatsu Terada , Hiroyuki Uchida , Hiroya Yamaguchi

X-ray spectral imaging and Doppler mapping of Cassiopeia A

A detailed X-ray spectral analysis of Cas A using a deep exposure from the EPIC-MOS cameras on-board XMM-Newton is presented. Spectral fitting was performed on a 15x15 grid of 20"x20" pixels using a two component non-equilibrium ionisation…

Astrophysics · Physics 2009-11-06 R. Willingale , J. A. M. Bleeker , K. J. van der Heyden , J. S. Kaastra , J. Vink

Non-thermal bremsstrahlung as the dominant hard X-ray continuum emission from the supernova remnant MSH14-63 (RCW 86)

We present an analysis of the X-ray emission of the supernova remnant MSH14-63, which was partially covered by four observations with XMM-Newton. The detection of Fe K emission at 6.4 keV, and the lack of spatial correlation between hard…

Astrophysics · Physics 2007-05-23 Jacco Vink , Johan Bleeker , Jelle Kaastra , Kurt van der Heyden , Andrew Rasmussen , John Dickel

Evidence for TeV gamma ray emission from Cassiopeia A

232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV gamma ray emission was detected at the 5 sigma level, and a flux of (5.8 +-…

Astrophysics · Physics 2011-05-05 HEGRA Collaboration , F. Aharonian

Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the Supernova Remnant Cassiopeia A

We report on observations of the supernova remnant Cassiopeia A in the energy range from 100 MeV to 100 GeV using 44 months of observations from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. We perform a detailed…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Y. Yuan , S. Funk , G. Jóhannesson , J. Lande , L. Tibaldo , Y. Uchiyama

X-ray polarization detection of Cassiopeia A with IXPE

We report on a $\sim 5\sigma$ detection of polarized 3-6 keV X-ray emission from the supernova remnant Cassiopeia A with the Imaging X-ray Polarimetry Explorer (IXPE). The overall polarization degree of $1.8 \pm 0.3$% is detected by summing…

High Energy Astrophysical Phenomena · Physics 2022-10-26 Jacco Vink , Dmitry Prokhorov , Riccardo Ferrazzoli , Patrick Slane , Ping Zhou , Kazunori Asakura , Luca Baldini , Niccolo Bucciantini , Enrico Costa , Alessandro Di Marco , Jeremy Heyl , Frederic Marin , Tsunefumi Mizuno , C. Y. Ng , Melissa Pesce-Rollins , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Carmelo Sgro , Paolo Soffitta , Douglas A. Swartz , Toru Tamagawa , Martin C. Weisskopf , Yi-Jung Yang , Ronaldo Bellazzini , Raffaella Bonino , Elisabetta Cavazzuti , Luigi Costamante , Niccolo Di Lalla , Luca Latronico , Simone Maldera , Alberto Manfreda , Francesco Massaro , Ikuyuki Mitsuishi , Nicola Omodei , Chiara Oppedisano , Silvia Zane , Ivan Agudo , Lucio A. Antonelli , Matteo Bachetti , Wayne H. Baumgartner , Stefano Bianchi , Stephen D. Bongiorno , Alessandro Brez , Fiamma Capitanio , Simone Castellano , Stefano Ciprini , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Immacolata Donnarumma , Victor Doroshenko , Michal Dovciak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Wataru Iwakiri , Svetlana G. Jorstad , Vladimir Karas , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Ioannis Liodakis , Andrea Marinucci , Alan P. Marscher , Herman L. Marshall , Giorgio Matt , Fabio Muleri , Stephen L. O'Dell , Alessandro Papitto , George G. Pavlov , Abel L. Peirson , Matteo Perri , Maura Pilia , Andrea Possenti , Juri Poutanen , Simonetta Puccetti , Roger W. Romani , Gloria Spandre , Fabrizio Tavecchio , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Nicolas E. Thomas , Francesco Tombesi , Alessio Trois , Sergey Tsygankov , Roberto Turolla , Kinwah Wu , Fei Xie

X-Ray Synchrotron Emission from 10-100 TeV Cosmic-Ray Electrons in the Supernova Remnant SN 1006

We present the results of a joint spectral analysis of RXTE PCA, ASCA SIS, and ROSAT PSPC data of the supernova remnant SN 1006. This work represents the first attempt to model both the thermal and nonthermal X-ray emission over the entire…

Astrophysics · Physics 2009-11-07 G. E. Allen , R. Petre , E. V. Gotthelf

Element Abundances in the Unshocked Ejecta of Cassiopeia A

We analyze and model the infrared spectrum of the Cassiopeia A supernova remnant, with the aim of determining the masses of various elements in the unshocked ejecta. In this way we complement the survey of the X-ray emitting ejecta of Hwang…

High Energy Astrophysical Phenomena · Physics 2020-12-02 J. Martin Laming , Tea Temim

Modeling the Shell of Cassiopeia A to find the TeV Gamma-ray Emission Region

We will present the multi-wavelength modeling of the supernova remnant Cassiopeia A's shell based on radio, X-rays, and GeV-TeV gamma rays. Our aim is to estimate the location of TeV gamma rays with the help of spectral analysis of X-rays…

High Energy Astrophysical Phenomena · Physics 2013-08-22 T. Ergin , L. Saha , P. Majumdar , M. Bozkurt , E. N. Ercan