• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2018 Fiscal Year Annual Research Report

Extending the frontier of the transient science by multi-dimensional and multi-wavelength radiation transfer simulations

Publicly Offered Research

Project AreaGravitational wave physics and astronomy: Genesis
Project/Area Number 18H04585
Research InstitutionKyoto University

Principal Investigator

前田 啓一  京都大学, 理学研究科, 准教授 (00503880)

Project Period (FY) 2018-04-01 – 2020-03-31
Keywords輻射輸送 / 超新星 / 重力波天体
Outline of Annual Research Achievements

超新星爆発機構の全貌解明のためには、爆発モデルに基づいた輻射計算により予想される光度曲線・スペクトルを導き、これを様々な観測データにより検証することが必要である。本課題では、(1)超新星・爆発的天体現象に適用するための多次元・多波長輻射輸送コードの開発、(2)最新の超新星爆発モデルへの適用による、爆発理論の直接検証、を目的とする。本課題では、特に以下の天体をターゲットとした研究を進める。(a)標準的な「ニュートリノ駆動超新星」の現実的・多次元モデルに基づいた一般的な超新星の研究、(b)「連星中性子星の先駆超新星」モデルに基づいた、連星中性子星の形成過程の研究、(c)「超強磁場中性子星駆動超新星」の多次元モデルに基づいた、超高輝度超新
星の研究。
研究目的(a)に関しては放射性元素崩壊に伴うガンマ線・エックス線放射、可視光度曲線およびスペクトルの輻射シミュレーションがほぼ完了しており、論文を執筆中である。研究目的(b)(c)についても協力研究者との議論が進んでおり、計算セットアップのための準備が進んでいる。
また、本課題で目標とする多次元モデルと実際の観測データとの比較を視野に入れ、単純化された球対称輻射輸送計算を用いた研究を遂行し、以下のような成果をあげた:GRB171205Aに伴う極超新星SN2017iukにおける超高速成分の発見(Izzo, de Ugarte Postigo, Maeda, et al. 2019, Nature)、IIb/Ib/Ic型超新星の後期スペクトル解析による親星質量の多様性(Fang, Maeda, et al. 2019, Nature Astronomy; Fang, Maeda 2018)。
以上の成果を複数の国内外研究会で発表した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

研究実績の概要に記述したように、放射性元素崩壊に伴うガンマ線・エックス線放射、可視光度曲線およびスペクトルの輻射シミュレーションがほぼ完了し、結果を取りまとめ中である。また、様々な超新星に関して一次元モデルと観測との比較が進行しており、特にガンマ線バーストに付随する超新星およびIIb/Ib/Ic型超新星の性質についての理解が大きく進展した。これらは、多次元計算が完了した際に観測データとの比較を進めるうえで基礎となる成果である。

Strategy for Future Research Activity

放射性元素崩壊に伴うガンマ線・エックス線放射、可視光度曲線およびスペクトルの輻射シミュレーションの計算結果を取りまとめ、論文として発表する。研究目的(b)、(c)についても協力研究者との議論が進んでおり、計算セットアップのための準備が進んでいる。本年度は、これらの課題に関して輻射シミュレーションを行う。

  • Research Products

    (33 results)

All 2019 2018 Other

All Int'l Joint Research (6 results) Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results) Presentation (14 results) (of which Int'l Joint Research: 10 results,  Invited: 11 results) Remarks (3 results)

  • [Int'l Joint Research] Pennsylvania State University/Northwestern University/Ohio State University,(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Pennsylvania State University/Northwestern University/Ohio State University,
    • # of Other Institutions
      2
  • [Int'l Joint Research] DESY/MPE/Thuringer Landessternwarte Tautenburg(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      DESY/MPE/Thuringer Landessternwarte Tautenburg
  • [Int'l Joint Research] Instituto de Astrofisica de Andalucia(スペイン)

    • Country Name
      SPAIN
    • Counterpart Institution
      Instituto de Astrofisica de Andalucia
  • [Int'l Joint Research] University of Copenhagen/Technical University of Denmark(デンマーク)

    • Country Name
      DENMARK
    • Counterpart Institution
      University of Copenhagen/Technical University of Denmark
  • [Int'l Joint Research] Osservatorio Astronomico di Capodimonte/Osservatorio Astronomico di Brera/Osservatorio Astronomico di Roma(イタリア)

    • Country Name
      ITALY
    • Counterpart Institution
      Osservatorio Astronomico di Capodimonte/Osservatorio Astronomico di Brera/Osservatorio Astronomico di Roma
    • # of Other Institutions
      2
  • [Int'l Joint Research]

    • # of Other Countries
      10
  • [Journal Article] A hybrid envelope-stripping mechanism for massive stars from supernova nebular spectroscopy2019

    • Author(s)
      Fang Qiliang、Maeda Keiichi、Kuncarayakti Hanindyo、Sun Fengwu、Gal-Yam Avishay
    • Journal Title

      Nature Astronomy

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1038/s41550-019-0710-6

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Signatures of a jet cocoon in early spectra of a supernova associated with a γ-ray burst2019

    • Author(s)
      Izzo L.、de Ugarte Postigo A.、Maeda K.、et al.
    • Journal Title

      Nature

      Volume: 565 Pages: 324~327

    • DOI

      10.1038/s41586-018-0826-3

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High-energy Emission from Interacting Supernovae: New Constraints on Cosmic-Ray Acceleration in Dense Circumstellar Environments2019

    • Author(s)
      Murase Kohta、Franckowiak Anna、Maeda Keiichi、Margutti Raffaella、Beacom John F.
    • Journal Title

      The Astrophysical Journal

      Volume: 874 Pages: 80~80

    • DOI

      10.3847/1538-4357/ab0422

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relativistic Supernova Ejecta Colliding with a Circumstellar Medium: An Application to the Low-luminosity GRB 171205A2019

    • Author(s)
      Suzuki Akihiro、Maeda Keiichi、Shigeyama Toshikazu
    • Journal Title

      The Astrophysical Journal

      Volume: 870 Pages: 38~38

    • DOI

      10.3847/1538-4357/aaef85

    • Peer Reviewed
  • [Journal Article] Evolution of Magnetized White Dwarf Binaries to Type Ia Supernovae2019

    • Author(s)
      Ablimit Iminhaji、Maeda Keiichi
    • Journal Title

      The Astrophysical Journal

      Volume: 871 Pages: 31~31

    • DOI

      10.3847/1538-4357/aaf722

    • Peer Reviewed
  • [Journal Article] Monte Carlo Population Synthesis on Massive Star Binaries: Astrophysical Implications for Gravitational-wave Sources2018

    • Author(s)
      Ablimit Iminhaji、Maeda Keiichi
    • Journal Title

      The Astrophysical Journal

      Volume: 866 Pages: 151~151

    • DOI

      10.3847/1538-4357/aae378

    • Peer Reviewed
  • [Journal Article] Surface Radioactivity or Interactions? Multiple Origins of Early-excess Type Ia Supernovae and Associated Subclasses2018

    • Author(s)
      Jiang Ji-an、Doi Mamoru、Maeda Keiichi、Shigeyama Toshikazu
    • Journal Title

      The Astrophysical Journal

      Volume: 865 Pages: 149~149

    • DOI

      10.3847/1538-4357/aadb9a

    • Peer Reviewed
  • [Journal Article] The Origin of the Ha-like Structure in Nebular Spectra of Type IIb Supernovae2018

    • Author(s)
      Fang Qiliang、Maeda Keiichi
    • Journal Title

      The Astrophysical Journal

      Volume: 864 Pages: 47~47

    • DOI

      10.3847/1538-4357/aad096

    • Peer Reviewed
  • [Journal Article] Type Ia Supernovae in the First Few Days: Signatures of Helium Detonation versus Interaction2018

    • Author(s)
      Maeda Keiichi、Jiang Ji-an、Shigeyama Toshikazu、Doi Mamoru
    • Journal Title

      The Astrophysical Journal

      Volume: 861 Pages: 78~78

    • DOI

      10.3847/1538-4357/aac8d8

    • Peer Reviewed
  • [Journal Article] Extended optical/NIR observations of Type Iax supernova 2014dt: Possible signatures of a bound remnant†2018

    • Author(s)
      Kawabata Miho、Kawabata Koji S、Maeda Keiichi、et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 70 Pages: 111~130

    • DOI

      https://doi.org/10.1093/pasj/psy116

    • Peer Reviewed
  • [Presentation] 超新星からの高エネルギー放射2019

    • Author(s)
      前田啓一
    • Organizer
      第18回高宇連研究会
    • Invited
  • [Presentation] 超新星の電波観測2019

    • Author(s)
      前田啓一
    • Organizer
      突発・変動現象の電波フォローアップ
    • Invited
  • [Presentation] Exploring the Phase Space of Extra-galactic Explosions2019

    • Author(s)
      Keiichi Maeda
    • Organizer
      TDA-MMS 2019
    • Int'l Joint Research / Invited
  • [Presentation] Diversities in Theories and Observations of Exploding White Dwarfs2019

    • Author(s)
      Keiichi Maeda
    • Organizer
      10th NAOJ DTA Symposium on Stellar deaths and their diversity
    • Int'l Joint Research / Invited
  • [Presentation] Sub-Relativistic Expansion of Supernova Ejecta Associated with a Gamma-Ray Burst2018

    • Author(s)
      前田啓一
    • Organizer
      理論天文学研究会2018
    • Invited
  • [Presentation] Modeling supernova observables through radiation transfer simulations2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      second annual symposium of GW-genesis
    • Int'l Joint Research
  • [Presentation] SN Ia progenitors and explosion mechanisms2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      Massive Stars and Supernovae
    • Int'l Joint Research / Invited
  • [Presentation] Testing The Origin of Type Ia supernovae through Their Properties in The First Few Days2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      Chile-Japan Academic Forum 2018
    • Int'l Joint Research / Invited
  • [Presentation] Stripped-Envelope Supernova in The Late Phase2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      Adventures in Astrophysics
    • Int'l Joint Research / Invited
  • [Presentation] Supernova light curves2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      Frontiers of the Physics of Massive Stars: from the Main Sequence to LIGO
    • Int'l Joint Research / Invited
  • [Presentation] Type Ia Supernova Triggered by He Detonation2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      The 15th Marcel Grossmann Meeting
    • Int'l Joint Research
  • [Presentation] Radiation Transfer Simulations for Explosive Transients2018

    • Author(s)
      前田啓一
    • Organizer
      「重力波物理学天文学・創世記」ワークショップ
  • [Presentation] Progenitors and Explosion Mechanisms of Stripped-Envelope Supernovae2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      Shocking Supernovae: surrounding interactions and unusual events
    • Int'l Joint Research / Invited
  • [Presentation] Progenitors, Mass Loss, and Shock Breakout of Supernovae2018

    • Author(s)
      Keiichi Maeda
    • Organizer
      Jet and Shock Breakout in Cosmic Transients
    • Int'l Joint Research / Invited
  • [Remarks] 極超新星に付随する超高速成分を発見 -極超新星が光速ジェットにより引き起こされることを実証-

    • URL

      http://www.kyoto-u.ac.jp/ja/research/research_results/2018/190117_1.html

  • [Remarks] 重い星の終末期の外層放出機構を解明 -いつ、どのように星は減量するのか-

    • URL

      http://www.kyoto-u.ac.jp/ja/research/research_results/2018/190305_1.html

  • [Remarks] A hybrid mechanism works for massive stars...

    • URL

      https://astronomycommunity.nature.com/users/233280-keiichi-maeda/posts/44889-a-hybrid-mechanism-works-for-massive-stars-in-losing-their-weight

URL: 

Published: 2019-12-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi