工藤哲洋

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研究者氏名
工藤哲洋
eメール
kudohnagasaki-u.ac.jp
所属
長崎大学
部署
教育学部
職名
准教授
学位
博士(理学)(東北大学)

プロフィール

東北大学卒業後,東北大学大学院理学研究科で天文学を専攻.博士(理学)取得.その後,総合研究大学院大学研究生,国立天文台非常勤研究員,学術振興会特別研究員,西オンタリオ大学(カナダ)ポスドク研究員などを経て,国立天文台上級研究員(後に助教に職名変更)に採用される.現在,長崎大学教育学部准教授.

研究キーワード

 
 

研究分野

 
 

論文

 
Sayantan Auddy, Shantanu Basu, Takahiro Kudoh
Monthly Notices of the Royal Astronomical Society   474 400-410   2018年2月
© 2015 The Authors. Simulations generally show that non-self-gravitating clouds have a lognormal column density (Σ) probability distribution function (PDF), while self-gravitating clouds with active star formation develop a distinct power-law tail...
Tomoyuki Hanawa, Takahiro Kudoh, Kohji Tomisaka
Astrophysical Journal   848    2017年9月
We examine the linear stability of an isothermal filamentary cloud permeated
by a perpendicular magnetic field. Our model cloud is assumed to be supported
by gas pressure against the self-gravity in the unperturbed state. For
simplicity, the densi...
Takuya Akahori, Hiroyuki Nakanishi, Yoshiaki Sofue, Yutaka Fujita, Kiyotomo Ichiki, Shinsuke Ideguchi, Osamu Kameya, Takahiro Kudoh, Yuki Kudoh, Mami Machida, Yoshimitsu Miyashita, Hiroshi Ohno, Takeaki Ozawa, Keitaro Takahashi, Motokazu Takizawa, Dai G. Yamazaki
Publications of the Astronomical Society of Japan   70    2017年9月
Magnetic field is ubiquitous in the Universe and it plays essential roles in
various astrophysical phenomena, yet its real origin and evolution are poorly
known. This article reviews current understanding of magnetic fields in the
interstellar med...
Sayantan Auddy, Shantanu Basu, Takahiro Kudoh
Astrophysical Journal   831    2016年9月
We develop a magnetic ribbon model for molecular cloud filaments. These
result from turbulent compression in a molecular cloud in which the background
magnetic field sets a preferred direction. We argue that this is a natural
model for filaments a...
Takahiro Kudoh, Shantanu Basu
Astrophysical Journal   794    2014年8月
We clarify the mechanism of accelerated core formation by large-scale
nonlinear flows in subcritical magnetic clouds by finding a semi-analytical
formula for the core formation time and describing the physical processes that
lead to them. Recent n...

Misc

 
Sayantan Auddy, Shantanu Basu, Takahiro Kudoh
   2017年10月
Simulations generally show that non-self-gravitating clouds have a lognormal
column density (Tex) probability distribution function (PDF), while
self-gravitating clouds with active star formation develop a distinct power-law
tail at high colu...
Shinji Koide, Kazunari Shibata, Takahiro Kudoh
11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity   1585-1588   2008年12月
Recent general relativistic magnetohydrodynamic (GRMHD) simulations of jet formation show inevitable formation of anti-parallel magnetic field in black hole magneto-spheres. In such situation, magnetic reconnections should take place and influence...
P. Antolin, K. Shibata, T. Kudoh, D. Shiota, D. Brooks
   2009年3月
Alfven waves created by sub-photospheric motions or by magnetic reconnection
in the low solar atmosphere seem good candidates for coronal heating. However,
the corona is also likely to be heated more directly by magnetic reconnection,
with dissipa...
Hiroyuki R. Takahashi, Jin Matsumoto, Youhei Masada, Takahiro Kudoh
AIP Conference Proceedings   1279 427-429   2010年12月
We investigate the dynamics of the relativistic Sweet-Parker reconnection by means of Relativistic Resistive Magnetohydrodynamic (RRMHD) simulation. It is found that the magnetic energy is preferentially converted to the thermal energy in the diff...
Takuya Akahori, Yutaka Fujita, Kiyotomo Ichiki, Shinsuke Ideguchi, Takahiro Kudoh, Yuki Kudoh, Mami Machida, Hiroyuki Nakanishi, Hiroshi Ohno, Takeaki Ozawa, Keitaro Takahashi, Motokazu Takizawa, for the SKA-JP Magnetism SWG
   2016年3月
Magnetic fields play essential roles in various astronomical objects. Radio
astronomy has revealed that magnetic fields are ubiquitous in our Universe.
However, the real origin and evolution of magnetic fields is poorly proven. In
order to advance...

書籍等出版物

 
シミュレーション天文学
富阪幸治他
2007年8月   
活動する宇宙
柴田一成他
1999年11月   

講演・口頭発表等

 
磁場が強い分子雲におけるフィラメントの形成と分裂
工藤哲洋,花輪知幸,富阪幸治
日本天文学会2018年秋季年会   2018年9月21日   
Takahiro Kudoh
Proceedings of the International Astronomical Union   2007年1月1日   
We review the theoretical studies of the Alfvn wave model of spicules and coronal heating, mainly based on the papers by Kudoh & Shibata (1999), Saito et al. (2001) and Moriyasu et al. (2004) which performed MHD numerical simulations of nonlinear ...
Takahiro Kudoh, Shantanu Basu
Journal of Plasma Physics   2006年12月1日   
We review our recent numerical simulations of star formation. First, we show a simulation of magnetic turbulence in a plate-shaped self-gravitating stratified cloud. We find that the cloud is lifted up by the pressure of magnetic turbulence and re...
Takahiro Kudoh, Ryoji Matsumoto, Kazunari Shibata
Astrophysics and Space Science   2003年12月1日   
We present the MHD simulation including accretion flows in disks, acceleration of outflows from disks, and collimation of the outflows self-consistently. Although it was considered that this kind of simulations only shows the transient phenomena o...