Yudai Suwa

J-GLOBAL         Last updated: Sep 16, 2019 at 21:23
 
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Name
Yudai Suwa
Affiliation
Kyoto Sangyo University
Section
Faculty of Science Department of Astropysics and Atmospheric Science
Job title
Associate Professor
Degree
Ph.D(The University of Tokyo)

Profile

My research field is high energy astrophysics.

Academic & Professional Experience

 
Apr 2019
 - 
Today
Affiliate Associate Professor, Yukawa Institute for Theoretical Physics, Kyoto University
 
Apr 2018
 - 
Today
Associate Professor, Kyoto Sangyo University
 
Jan 2013
 - 
Mar 2018
Associate Professor, Yukawa Institute for Theoretical Physics, Kyoto University
 
Apr 2014
 - 
Mar 2016
Visiting researcher, Max Planck Institute for Astrophysics
 
Apr 2011
 - 
Dec 2012
Research Assistant Professor, Yukawa Institute for Theoretical Physics, Kyoto University
 

Published Papers

 
Yudai Suwa, Kohsuke Sumiyoshi, Ken'ichiro Nakazato, Yasufumi Takahira, Yusuke Koshio, Masamitsu Mori, Roger A. Wendell
The Astrophysical Journal   881(2) 139   Aug 2019   [Refereed]
Monthly Notices of the Royal Astronomical Society      Mar 2019   [Refereed]
56Ni is an important indicator of the supernova explosions, which characterizes light curves. Nevertheless, rather than 56Ni, explosion energy has often been paid attention from explosion mechanism community, since it is, at ...
Monthly Notices of the Royal Astronomical Society      Dec 2018   [Refereed]
We investigate remnant neutron star masses (in particular, the minimum allowed mass) by performing advanced stellar evolution calculations and neutrino-radiation hydrodynamics simulations for core-collapse supernova explosions. We find that, based...
Monthly Notices of the Royal Astronomical Society      Feb 2018   [Refereed]
In the coming Large Synoptic Survey Telescope era, we will observe O(100) of lensed supernovae (SNe). In this paper, we investigate the possibility for predicting time and sky position of an SN using strong lensing. We find that it will be possibl...
Monthly Notices of the Royal Astronomical Society      Nov 2017   [Refereed]
We investigate the nucleosynthesis that occurs during the two-dimensional neutrino-driven explosion of ultra-stripped Type Ic supernovae evolved from 1.45 and 1.5 M CO stars. These supernovae explode with an explosion energy of ̃10<SUP...
The Astrophysical Journal Supplement Series      Jul 2017   [Refereed]
The 1-70 keV persistent spectra of 15 magnetars, observed with Suzaku from 2006 to 2013, were studied as a complete sample. Combined with early NuSTAR observations of four hard X-ray emitters, nine objects showed a hard power-law emission dominati...
The Astrophysical Journal      Apr 2017   [Refereed]
Nascent neutron stars (NSs) with millisecond periods and magnetic fields in excess of 1016 Gauss can drive highly energetic and asymmetric explosions known as magnetar-powered supernovae. These exotic explosions are one theoretical inte...
Monthly Notices of the Royal Astronomical Society      Sep 2016   [Refereed]
We report results from a series of three-dimensional (3D) rotational core-collapse simulations for 11.2 and 27 M stars employing neutrino transport scheme by the isotropic diffusion source approximation. By changing the initial strengt...
Monthly Notices of the Royal Astronomical Society      Aug 2016   [Refereed]
We investigate a method to construct parametrized progenitor models for core-collapse supernova simulations. Different from all modern core-collapse supernova studies, which rely on progenitor models from stellar evolution calculations, we follow ...
The Astrophysical Journal      Jan 2016   [Refereed]
By performing neutrino-radiation hydrodynamic simulations in spherical symmetry (1D) and axial symmetry (2D) with different progenitor models by Woosley &amp; Heger from 12 to 100 M, we find that all 1D runs fail to produce an explosio...
Monthly Notices of the Royal Astronomical Society      Dec 2015   [Refereed]
We study explosion characteristics of ultra-stripped supernovae (SNe), which are candidates of SNe generating binary neutron stars (NSs). As a first step, we perform stellar evolutionary simulations of bare carbon-oxygen cores of mass from 1.45 to...

Conference Activities & Talks

 
From supernovae to neutron stars [Invited]
Yudai Suwa
Quarks and Compact Stars 2017   Feb 2017   
Supernovae generating binary neutron stars
Yudai Suwa
Symposium on "New development in astrophysics through multimessenger observations of gravitational wave sources"   Dec 2016   
Supernovae as birth sites of neutron stars
Yudai Suwa
Nuclear Physics, Compact Stars, and Compact Star Mergers 2016   Nov 2016   
Neutrino-driven explosions of ultra-stripped Type Ic supernovae generating binary neutron stars
Yudai Suwa
Supernovae: The Outliers   Sep 2016   
Reverse construction of initial conditions: from supernovae to progenitors
Yudai Suwa
Many Riddles About Core-Collapse Supernovae   Jun 2016   

Research Grants & Projects

 
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(研究活動スタート支援)
Project Year: 2011 - 2012    Investigator(s): Yudai SUWA
I performed core-collapse supernova simulations using multi-dimensional neutrino-radiation-hydrodynamic code. I investigated the following two topics; i) the impact of nuclear equation of state, and ii) the dependence of neutrino heating efficienc...