研究者業績
基本情報
- 所属
- 国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 招聘研究開発員
- 学位
- 理学博士(中央大学)理学修士(中央大学)
- J-GLOBAL ID
- 201201017168289883
- researchmap会員ID
- 7000000018
学歴
4-
- 2011年
-
- 2008年
-
- 2006年
-
- 2002年
委員歴
1-
2012年
論文
27-
Monthly Notices of the Royal Astronomical Society 484(2) 2229-2233 2019年4月 査読有り
-
Astrophysical Journal, Supplement Series 238(2) 2018年10月
-
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 70(3) 2018年6月 査読有り
-
Journal of Astronomical Telescopes, Instruments, and Systems 4(2) 2018年4月 査読有り
MISC
16-
Proceedings of Science 2017年1月1日
-
2015年11月4日Colliding Wolf-Rayet (WR) winds produce thermal X-ray emission widely<br /> observed by X-ray telescopes. In wide WR+O binaries, such as WR 140, the X-ray<br /> flux is tied to the orbital phase, and is a direct probe of the winds'<br /> properties. In the Galactic center, $\sim$30 WRs orbit the super massive black<br /> hole (SMBH) within $\sim$10", leading to a smorgasbord of wind-wind collisions.<br /> To model the X-ray emission of WR 140 and the Galactic center, we perform 3D<br /> hydrodynamic simulations to trace the complex gaseous flows, and then carry out<br /> 3D radiative transfer calculations to compute the variable X-ray spectra. The<br /> model WR 140 RXTE light curve matches the data well for all phases except the<br /> X-ray minimum associated with periastron, while the model spectra agree with<br /> the RXTE hardness ratio and the shape of the Suzaku observations throughout the<br /> orbit. The Galactic center model of the Chandra flux and spectral shape match<br /> well in the region r$<$3", but the model flux falls off too rapidly beyond this<br /> radius.
-
Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe pp.pp220-221 2014年9月
-
Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe pp.pp208-209 2014年9月
-
Suzaku-MAXI 2014: Expanding the Frontiers of the X-ray Universe pp.pp164-165 2014年9月
-
2014年5月20日Colliding wind binaries (CWBs) are unique laboratories for X-ray<br /> astrophysics. The massive stars in these systems possess powerful stellar winds<br /> with speeds up to $\sim$3000 km s$^{-1}$, and their collision leads to hot<br /> plasma (up to $\sim10^8$K) that emit thermal X-rays (up to $\sim$10 keV). Many<br /> X-ray telescopes have observed CWBs, including Suzaku, and our work aims to<br /> model these X-ray observations. We use 3D smoothed particle hydrodynamics (SPH)<br /> to model the wind-wind interaction, and then perform 3D radiative transfer to<br /> compute the emergent X-ray flux, which is folded through X-ray telescopes'<br /> response functions to compare directly with observations. In these proceedings,<br /> we present our models of Suzaku observations of the multi-year-period, highly<br /> eccentric systems $\eta$ Carinae and WR 140. The models reproduce the<br /> observations well away from periastron passage, but only $\eta$ Carinae's X-ray<br /> spectrum is reproduced at periastron; the WR 140 model produces too much flux<br /> during this more complicated phase.
-
Proceedings of SPIE - The International Society for Optical Engineering 9144 2014年
-
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray. Proceedings of the SPIE 8443 2012年9月
-
SUZAKU 2011: EXPLORING THE X-RAY UNIVERSE: SUZAKU AND BEYOND 1427 296-297 2012年
-
DEATH OF MASSIVE STARS: SUPERNOVAE AND GAMMA-RAY BURSTS 279(279) 351-352 2012年
-
Proceedings of the International Astronomical Union 10(16) 51-79 2012年
-
Proceedings of SPIE - The International Society for Optical Engineering 8443 2012年
-
DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings 1279 363-365 2010年10月
-
X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES 1248 9-12 2010年7月
-
JAXA Special Publication: The Energetic Cosmos: from Suzaku to ASTRO-H 198-199 2010年1月
-
Active OB-Stars: Laboratories for Stellar and Circumstellar Physics 361 500-502 2007年3月
講演・口頭発表等
68所属学協会
3Works(作品等)
1共同研究・競争的資金等の研究課題
3-
科学研究費補助金 若手研究(B) 2016年4月 - 2019年3月
-
科学研究費補助金 特別研究促進費 2009年4月 - 2011年3月
-
2005年
