Takashi Nagao profile picture

Takashi
Nagao

Tuorla Observatory
PhD

Biography

I am a postdoctoral researcher at University of Turku in Finland. I have obtained my PhD degree at Kyoto University in Japan on March 2019. After this, I moved to European Southern Observatory as a JSPS Overseas Research Fellow, and spent time there until November 2020. Then, I came to University of Turku.

Research

I am working on supernovae using physics of radiation and fluid as well as using spectroscopic and polarimetric observations. "How do massive stars die?", answering this question is one of my research goals.

Publications

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The bright long-lived Type II SN 2021irp powered by aspherical circumstellar material interaction I. Revealing the energy source with photometry and spectroscopy (2025)

Astronomy and Astrophysics
Reynolds, Thomas M.; Nagao, Takashi; Gottumukkala, Rashmi; Gutierrez, Claudia P.; Kangas, Tuomas; Kravtsov, Timo; Kuncarayakti, Hanindyo; Maeda, Keiichi; Elias-Rosa, Nancy; Fraser, Morgan; Kotak, Rubina; Mattila, Seppo; Pastorello, Andrea; Pessi, Priscila J.; Cai, Yongzhi; Fynbo, Johan Peter Uldall; Kawabata, Miho; Lundqvist, Peter; Matilainen, Katja; Moran, Shane; Reguitti, Andrea; Taguchi, Kenta; Yamanaka, Masamichi
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

Observational diversity of bright long-lived Type II supernovae (2025)

Astronomy and Astrophysics
Nagao, T.; Reynolds, T. M.; Kuncarayakti, H.; Cartier, R.; Mattila, S.; Maeda, K.; Sollerman, J.; Pessi, P. J.; Anderson, J. P.; Inserra, C.; Chen, T. -w.; Ferrari, L.; Fraser, M.; Young, D. R.; Gromadzki, M.; Gutiérrez, C. P.; Lundqvist, P.; Pignata, G.; Müller-Bravo, T. E.; Ragosta, F.; Reguitti, A.; Moran, S.; González-Bañuelos, M.; Kopsacheili, M.; Petrushevska, T.
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

Optical evolution of AT 2024wpp: the high-velocity outflows in Cow-like transients are consistent with high spherical symmetry (2025)

Monthly Notices of the Royal Astronomical Society
Pursiainen, M.; Killestein, T. L.; Kuncarayakti, H.; Charalampopoulos, P.; Warwick, B.; Lyman, J.; Kotak, R.; Leloudas, G.; Coppejans, D.; Kravtsov, T.; Maeda, K.; Nagao, T.; Taguchi, K.; Ackley, K.; Dhillon, V. S.; Galloway, D. K.; Kumar, A.; O'Neill, D.; Ramsay, G.; Steeghs, D.
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

The ambiguous AT2022rze: changing-look AGN mimicking a supernova in a merging galaxy system (2025)

Monthly Notices of the Royal Astronomical Society
Pessi, Priscila; Lunnan, R.; Sollerman, Jesper; Yan, L.; Le Reste, A.; Yao, Y.; Nordblom, S.; Sharma, Y.; Gilfanov, M.; Sunyaev, R.; Schulze, S.; Johansson, J.; Gangopadhyay, A.; Fremling, C.; Tristram, K.; Hayes, Matthew; Fransson, C.; Hu, Yan; Brennan, S. J.; Rose, S.; De, K.; Hinds, K-Ryan; Liu, Chang; Miller, Adam; Qin, Yu-Jing; Charalampopoulos, P.; Gkini, A.; Graham, Matthew; Gutiérrez, Claudia; Mattila, Seppo; Nagao, Takashi; Perez-Fournon, I; Poidevin, F.; Bloom, J. S.; Brugger, J.; Chen, T. X.; Kasliwal, Mansi ; Masci, F. J.; Purdum, J. N.
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

Evidence for bipolar explosions in Type IIP supernovae (2024)

Astronomy and Astrophysics
Nagao, T.; Maeda, K.; Mattila, S.; Kuncarayakti, H.; Kawabata, M.; Taguchi, K.; Nakaoka, T.; Cikota, A.; Bulla, M.; Vasylyev, S. S.; Gutiérrez, C. P.; Yamanaka, M.; Isogai, K.; Uno, K.; Ogawa, M.; Inutsuka, S.; Tsurumi, M.; Imazawa, R.; Kawabata, K. S.
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

Intermediate-luminosity Type IIP SN 2021gmj : a low-energy explosion with signatures of circumstellar material (2024)

Monthly Notices of the Royal Astronomical Society
Murai Yuta, Tanaka Masaomi, Kawabata Miho, Taguchi Kenta, Teja Rishabh Singh, Nakaoka Tatsuya, Maeda Keiichi, Kawabata Koji S, Nagao Takashi, Moriya Takashi J, Sahu D K, Anupama G C, Tominaga Nozomu, Morokuma Tomoki, Imazawa Ryo, Inutsuka Satoko, Isogai Keisuke, Kasuga Toshihiro, Kobayashi Naoto, Kondo Sohei, Maehara Hiroyuki, Mori Yuki, Niino Yuu, Ogawa Mao, Ohsawa Ryou, Okumura Shin-ichiro, Saito Sei, Sako Shigeyuki, Takahashi Hidenori, Uno Kohki, Yamanaka Masayuki
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )