Search Results 1-20 of 252

  • Neutrinos from the Galactic Center Hosting a Hypernova Remnant

    He Hao-Ning , Lee Shiu-Hang , Nagataki Shigehiro , Kusenko Alexander

    Similar to star-forming galaxies or starburst galaxies, star-forming regions in our Galaxy can host cosmic-ray (CR) accelerators and rich gas as targets of hadronuclear interaction. By our estimations …

    The Astrophysical Journal (891), 2020-03-18

    IR 

  • Non-Equilibrium Plasma in Supernova Remnants  [in Japanese]

    山口 弘悦

    プラズマ・核融合学会誌 = Journal of plasma and fusion research 95(12), 610-614, 2019-12

  • Time Evolution of Broadband Nonthermal Emission from Supernova Remnants in Different Circumstellar Environments

    Yasuda Haruo , Lee Shiu-Hang

    Supernova remnants (SNRs) are thought to be one of the major acceleration sites of galactic cosmic rays and an important class of objects for high-energy astrophysics. …

    Astrophysical Journal (876), 2019-05-01

    IR 

  • ALMA CO Observations of Supernova Remnant N63A in the Large Magellanic Cloud: Discovery of Dense Molecular Clouds Embedded within Shock-ionized and Photoionized Nebulae

    Sano H. , Matsumura H. , Nagaya T. , Yamane Y. , Alsaberi R. Z. E. , Filipović M. D. , Tachihara K. , Fujii K. , Tokuda K. , Tsuge K. , Yoshiike S. , Onishi T. , Kawamura A. , Minamidani T. , Mizuno N. , Yamamoto H. , Inutsuka S. , Inoue T. , Maxted N. , Rowell G. , Sasaki M. , Fukui Y.

    … We carried out new 12CO(J = 1–0, 3–2) observations of a N63A supernova remnant (SNR) from the LMC using the Atacama Large Millimeter/submillimeter Array (ALMA) and Atacama Submillimeter Telescope Experiment. …

    The Astrophysical Journal 873(1), 40, 2019-03

    IR 

  • Chandrasekhar and Sub-Chandrasekhar Models for the X-Ray Emission of Type Ia Supernova Remnants. I. Bulk Properties

    Martínez-Rodríguez Héctor , Badenes Carles , Lee Shiu-Hang , Patnaude Daniel J. , Foster Adam R. , Yamaguchi Hiroya , Auchettl Katie , Bravo Eduardo , Slane Patrick O. , Piro Anthony L. , Park Sangwook , Nagataki Shigehiro

    … The bulk properties of Type Ia supernova remnants, such as the radius and the centroid energy of the Fe Kα blend in the X-ray spectrum, are determined by the properties of the supernova ejecta and the ambient medium. … We model the interaction between Chandrasekhar and sub-Chandrasekhar models for Type Ia supernova ejecta and a range of uniform ambient medium densities in one dimension up to an age of 5000 years. …

    The Astrophysical Journal 865(2), 2018-10-01

    IR 

  • Shock acceleration of electrons and synchrotron emission from the dynamical ejecta of neutron star mergers

    Lee Shiu-Hang , Maeda Keiichi , Kawanaka Norita

    … Analogous to supernovae and supernova remnants, the NSM dynamical ejecta are expected to produce nonthermal emission by electrons accelerated at a shock wave. …

    The Astrophysical Journal 858(1), 2018-05-01

    IR 

  • Interstellar dust and polycyclic aromatic hydrocarbons unveiled by AKARI near-infrared spectroscopy

    Seok Ji Yeon

    … The well-known emission feature at 3.3 micrometers, commonly attributed to polycyclic aromatic hydrocarbons (PAHs) as well as other minor features such as the aliphatic emission band at 3.43 micrometers were detected from diverse physical conditions, including HII regions, supernova remnants, and starburst galaxies. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (JAXA-SP-17-009E), 107-114, 2018-03-09

    IR 

  • Fe II-Bright Supernova Remnants in Our Galaxy and Nearby Galaxies

    Lee Ho Gyu , 尾中 敬 , Koo Bon Chul , Lee Jae Joon , Lee Ho Gyu , Onaka Takashi , Koo Bon Chul , Lee Jae Joon

    … Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, JapanWe have performed extensive near-infrared [Fe II] line observations of supernova remnants (SNRs) in our Galaxy and nearby galaxies using various instruments and telescopes. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (JAXA-SP-17-010E), 253-255, 2018-03-09

    IR 

  • SPICA's Promise for Supernovae and Supernova Remnant Studies

    松浦 美香子 , Matsuura Mikako

    … Equipped with near- to far-infrared imaging and spectroscopic instruments, the SPICA mission will enable a more fuller picture of supernovae and supernova remnants, potentially resolving if SNe can be a major source of dust in the interstellar medium of galaxies.Physical characteristics: Original contains color illustrations …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (JAXA-SP-17-010E), 195-197, 2018-03-09

    IR 

  • The Impact of Progenitor Mass Loss on the Dynamical and Spectral Evolution of Supernova Remnants

    Patnaude Daniel J. , Lee Shiu-Hang , Slane Patrick O. , Badenes Carles , Nagataki Shigehiro , Ellison Donald C. , Milisavljevic Dan

    … The imprint of this mass loss is observed in the spectra and dynamics of the expanding blast wave on timescales of days to years after core collapse, and the effects on the spectral and dynamical evolution may linger long after the supernova has evolved into the remnant stage. … We present three models and compare and contrast how the progenitor mass-loss history impacts the dynamics and spectral evolution of the supernovae and supernova remnants. …

    The Astrophysical Journal 849(2), 2017-11-10

    IR 

  • Supernova Remnant Paradigm for Cosmic-Ray Origin  [in Japanese]

    Uchiyama Yasunobu , Tanaka Takaaki , Tajima Hiroyasu

    … While it is widely believed that supernova remnants (SNRs) are the sources of Galactic cosmic rays, unequivocal evidence for the acceleration of high-energy protons in SNRs lacked until recently. … We describe the Fermi-LAT observations of these objects along with gamma-ray observations of some other remnants and discuss their implications to our understanding of the acceleration of the Galactic CRs.</p> …

    Butsuri 72(9), 649-657, 2017

    J-STAGE 

  • Searching for Anisotropy from nearby SNR in Cosmic Rays with CALET  [in Japanese]

    Motz Holger , Asaoka Yoichi , Torii Shoji , Bhattacharyya Saptashwa

    … ISS-based Calorimetric Electron Telescope (CALET) is directly measuring the energy spectrum and direction distribution of electron+positron cosmic-rays up to 20 TeV.Nearby supernova remnants (SNR), foremost the Vela SNR, could have a detectable signature both in the TeV-region spectrum, as well as in the form of an anisotropy of the measured flux.Using the numerical cosmic-ray propagation code DRAGON, the direction dependent flux expected to be measured by CALET was calculated for various conditions of cosmic-ray …

    Meeting Abstracts of the Physical Society of Japan 72.1(0), 444-444, 2017

    J-STAGE 

  • Theory and Observations of Cosmic-Ray Acceleration at Supernova Remnant Shocks  [in Japanese]

    YAMAZAKI Ryo

    銀河宇宙線の起源天体と考えられている超新星残骸の無衝突衝撃波での宇宙線加速の理論と,最新のX線・ガンマ線観測結果,およびその理論的解釈についてまとめる.特に宇宙線電子によるシンクロトロン放射と逆コンプトン散乱放射,宇宙線陽子によるパイ中間子崩壊ガンマ線の観測から,宇宙線加速の理論にどのような示唆が得られているか紹介する.

    プラズマ・核融合学会誌 92(2), 78-82, 2016-02

    NDL Digital Collections 

  • Investigating Leptonic 3-Particle Dark Matter Decay as the Source of the Positron Excess with CALET  [in Japanese]

    Motz Holger , Asaoka Yoichi , Torii Shoji , Bhattacharyya Saptashwa

    … <p>With supernova remnants assumed to be the main source of electron cosmic rays, an extra source emitting an equal amount of electrons and positrons could explain the observed positron excess. …

    Meeting Abstracts of the Physical Society of Japan 71.2(0), 311-311, 2016

    J-STAGE 

  • Suzaku View of Supernova Remnants in the Thermal Aspect  [in Japanese]

    山口 弘悦

    天文月報 = The astronomical herald 108(12), 795-803, 2015-12

  • Studies of Cosmic-Ray Acceleration in Supernova Remnants with X-Ray and Gamma-Ray Observations  [in Japanese]

    田中 孝明

    天文月報 = The astronomical herald 108(10), 675-683, 2015-10

  • N49: THE FIRST ROBUST DISCOVERY OF RECOMBINING PLASMA IN AN EXTRA GALACTIC SUPERNOVA REMNANT

    Uchida Hiroyuki , Koyama Katsuji , Yamaguchi Hiroya

    … Recent discoveries of recombining plasmas (RPs) in supernova remnants (SNRs) have dramatically changed our understanding of SNR evolution. …

    The Astrophysical Journal 808(1), 2015-07-21

    IR 

  • High-Resolution X-Ray Spectroscopy of Galactic Supernova Remnants  [in Japanese]

    勝田 哲 , 常深 博 , 森 浩二 [他]

    天文月報 = The astronomical herald 108(2), 113-121, 2015-02

  • Global distribution of ionizing and recombining plasmas in the supernova remnant G290.1-0.8

    KAMITSUKASA Fumiyoshi , KOYAMA Katsuji , UCHIDA Hiroyuki [他]

    Publications of the Astronomical Society of Japan 67(2), 16-1-8, 2015

  • Suzaku studies of the supernova remnant CTB 109 hosting the magnetar 1E 2259+586

    NAKANO Toshio , MURAKAMI Hiroaki , MAKISHIMA Kazuo [他]

    Publications of the Astronomical Society of Japan 67(1), 9-1-12, 2015

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