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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SN 2023gpw: Exploring the diversity and power sources of hydrogen-rich superluminous supernovae (2026)

Astronomy and Astrophysics
Kangas, T.; Charalampopoulos, P.; Nagao, T.; Yan, L.; Stritzinger, M.; Schulze, S.; Das, K.; Elias-Rosa, N.; Fremling, C.; Perley, D.; Sollerman, J.; Muller-Bravo, T. E.; Galbany, L.; Groom, S. L.; Gutierrez, C. P.; Kasliwal, M. M.; Kotak, R.; Laher, R. R.; Lundqvist, P.; Mattila, S.; Smith, R.
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

The hydrogen-free circumstellar interaction in the Type Ib supernova 2021efd: A clue to the mechanism of the helium-layer stripping (2026)

Astronomy and Astrophysics
Pyykkinen, N.; Nagao, T.; Kuncarayakti, H.; Stritzinger, M. D.; Kangas, T.; Maeda, K.; Chen, P.; Sollerman, J.; Burns, C.; Bose, S.; Folatelli, G.; Ferrari, L.; Morrell, N.; Reguitti, A.; Salmaso, I.; Mattila, S.; Gal-Yam, A.; Fremling, C.; Anand, S.; Kasliwal, M. M.; Gutierrez, C. P.; Galbany, L.; Hoogendam, W.; Schulze, S.; Ashall, C.; Medler, K.; Pfeffer, C. M.; Lundqvist, P.; Rusholme, B.; Adler, J.
(A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä )

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 )

NUTS Transient Classification Report for 2025-03-18 (2025)

Stritzinger, M.; Nagao, T.; Ashall, C.; Burns, C. R.; Hoogendam, W.; Huangfei, X.; Hsiao, Y. E.; Kumar, S.; Medler, K.; Morrell, N.; Pfeffer, C.; Polin, A.
(D2 Artikkeli ammatillisessa kokoomateoksessa)

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 )