43 citations · 186 across the 10 of their papers we have counts for
8 papers · 1 filter
Flux Contribution and Geometry of the Charge Exchange Emission in the Starburst Galaxy M82
Hiromichi Okon, Randall K. Smith, Adrien picquenot +1
Recent X-ray studies of starburst galaxies have found that Charge eXchange (CX) commonly occurs between the outflowing hot plasma and cold gas, possibly from swept-up clouds. Howev…
Investigation of the Physical Origin of Overionized Recombining Plasma in the Supernova Remnant IC 443 with XMM-Newton
Hiromichi Okon, Takaaki Tanaka, Hiroyuki Uchida +4
The physical origin of the overionized recombining plasmas (RPs) in supernova remnants (SNRs) has been attracting attention because its understanding provides new insight into SNR…
Discovery of the Highly-Neutronized Ejecta Clump with Enhanced Abundances of Titanium and Chromium in the Type Ia Supernova Remnant 3C 397
Yuken Ohshiro, Hiroya Yamaguchi, Shing-Chi Leung +7
The supernova remnant (SNR) 3C 397 is thought to originate from a Type Ia supernova (SN Ia) explosion of a near-Chandrasekhar-mass () progenitor, based on the enhanced…
Probing Cosmic Rays with Fe K Line Structures Generated by Multiple Ionization Process
Hiromichi Okon, Makoto Imai, Takaaki Tanaka +2
Supernova remnants (SNRs) have been regarded as major acceleration sites of Galactic cosmic rays. Recent X-ray studies revealed neutral Fe K line emission from dense gas in the…
Deep XMM-Newton Observations Reveal the Origin of Recombining Plasma in the Supernova Remnant W44
Hiromichi Okon, Takaaki Tanaka, Hiroyuki Uchida +8
Recent X-ray studies revealed over-ionized recombining plasmas (RPs) in a dozen mixed-morphology (MM) supernova remnants (SNRs). However, the physical process of the over-ionizatio…
The Origin of Recombining Plasma and the Detection of the Fe-K Line in the Supernova Remnant W28
Hiromichi Okon, Hiroyuki Uchida, Takaaki Tanaka +2
Overionized recombining plasmas (RPs) have been discovered from a dozen of mixed- morphology (MM) supernova remnants (SNRs). However their formation process is still under debate.…
Evidence for a neutral iron line generated by MeV protons from supernova remnants interacting with molecular clouds
Kumiko K. Nobukawa, Masayoshi Nobukawa, Katsuji Koyama +6
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 neu…
Toward the Understanding of the Physical Origin of Recombining Plasma in the Supernova Remnant IC 443
Hideaki Matsumura, Takaaki Tanaka, Hiroyuki Uchida +2
We perform a spatially resolved spectroscopic analysis of X-ray emission from the supernova remnant (SNR) IC 443 with Suzaku. All the spectra are well reproduced by a model consist…