Hirotaka Ito RIKEN Collaborators Jin Matsumoto (RIKEN) Shigehiro Nagataki (RIKEN) Don Warren (RIKEN) Maxim Barkov (Perdue Univ.) Daisuke Yonetoku (Kanazawa Univ.) Photospheric Emission from Collapsar Jets in 3D Relativistic Hydrodynamics @ FOE2017, Corvallis, OR 2017/6/6
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Photospheric Emission from Collapsar Jets in 3D ...lazzatid/FOE2017... · Photospheric Emission in GRB jet Pe’er+2005,2006,2011; Giannios 2008; Beloborodov ... Dynamics of Jet have
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Hirotaka Ito RIKEN
Collaborators
Jin Matsumoto (RIKEN)
Shigehiro Nagataki (RIKEN)
Don Warren (RIKEN)
Maxim Barkov (Perdue Univ.)
Daisuke Yonetoku (Kanazawa Univ.)
Photospheric Emission from Collapsar Jets in
3D Relativistic Hydrodynamics
@ FOE2017, Corvallis, OR 2017/6/6
Model for Emission Mechanism
Internal Shock Model
Photospheric Emission Model
photosphere Internal shock
External shock
γ γ
・Low efficiency for gamma-ray production
・Clustering of peak energy ~ 1MeV
(e.g., Rees & Meszaros 2005, Pe’er et al.2005, Thompson 2007)
flaw
Natural consequence of fireball model
・High radiation efficiency
・Difficult to model hard spectrum in low energy band
Photospheric Emission in GRB jet
Pe’er +2005,2006,2011; Giannios 2008; Beloborodov
2010,2011; Vurm+2011,2016; Lundman+2013,2014,
Ito+2013,2014
Radiation transfer calculation based on
3D hydrodynamical simulation
Previous Studies
approximated treatment for radiation
Dynamics of Jet and
Radiation transfer must be solved
Ioka+2011
Dynamics of Jet have significant effect on the radiation signature