H
Hitoshi Yamaoka
Researcher at Kyushu University
Publications - 100
Citations - 3786
Hitoshi Yamaoka is an academic researcher from Kyushu University. The author has contributed to research in topics: Supernova & Light curve. The author has an hindex of 26, co-authored 100 publications receiving 3638 citations.
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Journal ArticleDOI
A giant outburst two years before the core-collapse of a massive star
Andrea Pastorello,Stephen J. Smartt,Seppo Mattila,John J. Eldridge,D. R. Young,K. Itagaki,Hitoshi Yamaoka,H. Navasardyan,Stefano Valenti,Stefano Valenti,Ferdinando Patat,I. Agnoletto,I. Agnoletto,T. Augusteijn,Stefano Benetti,Enrico Cappellaro,T. Boles,Jean-Marc Bonnet-Bidaud,M. T. Botticella,F. Bufano,F. Bufano,Chen Cao,Jinsong Deng,Jinsong Deng,M. Dennefeld,Nancy Elias-Rosa,Nancy Elias-Rosa,A. Harutyunyan,A. Harutyunyan,Francis P. Keenan,T. Iijima,V. Lorenzi,Paolo A. Mazzali,Paolo A. Mazzali,Xiangbo Meng,S. Nakano,T. B. Nielsen,Jonathan Smoker,Vallery Stanishev,Massimo Turatto,D. Xu,Luca Zampieri +41 more
TL;DR: It is reported that the peculiar type Ib supernova SN 2006jc is spatially coincident with a bright optical transient that occurred in 2004, andSpectroscopic and photometric monitoring of the supernova leads us to suggest that the progenitor was a carbon-oxygen Wolf–Rayet star embedded within a helium-rich circumstellar medium.
Journal ArticleDOI
The type ic hypernova sn 2002ap
Paolo A. Mazzali,Paolo A. Mazzali,J. Deng,Keiichi Maeda,Ken'ichi Nomoto,H. Umeda,Kazuhito Hatano,Koichi Iwamoto,Yuzuru Yoshii,Yukiyasu Kobayashi,Takeo Minezaki,Mamoru Doi,Keigo Enya,Hiroyuki Tomita,Stephen J. Smartt,Kenzo Kinugasa,Hideyo Kawakita,Kazuya Ayani,T. Kawabata,Hitoshi Yamaoka,Yulei Qiu,Kentaro Motohara,Christopher L. Gerardy,Robert A. Fesen,Koji S. Kawabata,Masanori Iye,Nobunari Kashikawa,George Kosugi,Y. Ohyama,Masahide Takada-Hidai,Gang Zhao,Ryan Chornock,Alexei V. Filippenko,Stefano Benetti,Massimo Turatto +34 more
TL;DR: In this paper, photometric and spectroscopic data of the energetic Type Ic supernova (SN) 2002ap are presented, and the properties of the SN are investigated through models of its spectral evolution and its light curve.
Journal ArticleDOI
A type IIb model for supernova 1993J
Ken'ichi Nomoto,Tomoharu Suzuki,Toshikazu Shigeyama,Shiomi Kumagai,Hitoshi Yamaoka,Hideyuki Saio +5 more
TL;DR: In this article, it was shown that the secondary brightening and subsequent decay of the light curve can be explained by the radioactive decay of 56Co; combined with the early spectrum, this suggests that the progenitor may have been a red supergiant with an unusually thin hydrogen-rich envelope.
Journal ArticleDOI
Massive stars exploding in a He-rich circumstellar medium. I. Type Ibn (SN 2006jc-like) events
Andrea Pastorello,Seppo Mattila,Seppo Mattila,Luca Zampieri,M. Della Valle,M. Della Valle,Stephen Smartt,Stefano Valenti,Stefano Valenti,I. Agnoletto,I. Agnoletto,Stefano Benetti,Chris Benn,David Branch,Enrico Cappellaro,M. Dennefeld,John J. Eldridge,John J. Eldridge,Avishay Gal-Yam,Avet Harutyunyan,Avet Harutyunyan,Ian Hunter,Hans Kjeldsen,Y. Lipkin,Paolo A. Mazzali,Peter A. Milne,H. Navasardyan,Eran O. Ofek,Elena Pian,Ohad Shemmer,S. Spiro,S. Spiro,R. A. Stathakis,S. Taubenberger,Massimo Turatto,Hitoshi Yamaoka +35 more
TL;DR: In this article, the authors present spectroscopic and photometric data of the Type Ibn supernovae 2006jc, 2000er and 2002ao, and discuss the general properties of this recently proposed supernova family, which also includes SN 1999cq.
Journal ArticleDOI
A carbon–oxygen star as progenitor of the type Ic supernova 1994I
Ken'ichi Nomoto,Hitoshi Yamaoka,O. R. Pols,E.P.J. van den Heuvel,K. Iwamoto,Shiomi Kumagai,Toshikazu Shigeyama +6 more
TL;DR: In this article, it was shown that the observed characteristics of SN1994I (in the nearby galaxy NGC5194), which has recently been classified as type Ic, are best understood on the basis of the second of the two alternatives above: that the progenitor was in a close binary system and lost its outer envelopes, leaving a C + O star (of mass ≈ 2 solar masses) which exploded when its iron core collapsed.