PhD Takashi Nagao - UTU Research Portal

Takashi Nagao
PhD

Tuorla Observatory (Department of Physics and Astronomy)

takashi.nagao@utu.fi

ORCID identifier: https://orcid.org/0000-0002-3933-7861

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

1 of 7

Analytical modeling of polarization signals arising from confined circumstellar material in Type II supernovae (2026)
- Astronomy and Astrophysics
Nagao, T.; Maeda, K.; Matsumoto, T.
(A1 Refereed original research article in a scientific journal)
Formation of Circumstellar Material during Double-white-dwarf Mergers and the Early Excess Emissions in Type Ia Supernovae (2026)
- Astrophysical Journal
Inoue, Yusuke; Maeda, Keiichi; Nagao, Takashi; Matsumoto, Tatsuya
(A1 Refereed original research article in a scientific journal)
Giant outbursts of clumpy material preceding Type II supernova 2024qiw (2026)
- Astronomy and Astrophysics
Nagao, T.; Kuncarayakti, H.; Maeda, K.; Mattila, S.; Kotak, R.; Killestein, T.; Humina, C.; Steeghs, D.; Jarvis, D.
(A1 Refereed original research article in a scientific journal)
Infrared observations reveal the reprocessing envelope in the tidal disruption event AT 2019azh (2026)
- Astronomy and Astrophysics
Reynolds, Thomas M.; Thomsen, Lars; Mattila, Seppo; Nagao, Takashi; Anderson, Joseph P.; Bauer, Franz E.; Charalampopoulos, Panos; Dai, Lixin; Faris, Sara; Gromadzki, Mariusz; Gutiérrez, Claudia P.; Kuncarayakti, Hanin; Inserra, Cosimo; Kankare, Erkki; Kravtsov, Timo; Moldon, Javier; Moran, Shane; Pérez Torres, Miguel; Wiseman, Phil; van Velzen, Sjoert
(A1 Refereed original research article in a scientific journal)
Massive stars exploding in a He-rich circumstellar medium XII. SN 2024acyl: A fast, linearly declining Type Ibn supernova with early flash-ionisation features (2026)
- Astronomy and Astrophysics
Cai, Y. -Z.; Pastorello, A.; Maeda, K.; Zhao, J. -W.; Wang, Z. -Y.; Peng, Z. -H.; Reguitti, A.; Tartaglia, L.; Filippenko, A. V.; Pan, Y.; Valerin, G.; Kumar, B.; Wang, Z.; Fraser, M.; Anderson, J. P.; Benetti, S.; Bose, S.; Brink, T. G.; Cappellaro, E.; Chen, T. -W.; Chen, X. -L.; Elias-rosa, N.; Esamdin, A.; Gal-yam, A.; Gonzalez-banuelos, M.; Gromadzki, M.; Gutierrez, C. P.; Inserra, C.; Iskandar, A.; Kangas, T.; Kankare, E.; Kravtsov, T.; Kuncarayakti, H.; Li, L. -P.; Liu, C. -X.; Liu, X. -K.; Lundqvist, P.; Matilainen, K.; Mattila, S.; Moran, S.; Muller-bravo, T. E.; Nagao, T.; Petrushevska, T.; Pignata, G.; Salmaso, I.; Smartt, S. J.; Sollerman, J.; Srivastav, S.; Stritzinger, M. D.; Wang, L. -T.; Yan, S. -Y.; Yang, Y.; Yang, Y. -P.; Zheng, W.; Zou, X. -Z.; Chen, L. -Y.; Du, X. -L.; Fang, Q. -L.; Fiore, A.; Ragosta, F.; Zha, S.; Zhang, J. -J.; Liu, X. W.; Bai, J. M.; Wang, B.; Wang, X. F.
(A1 Refereed original research article in a scientific journal)
Peculiar SN Ic 2022esa: An explosion of a massive Wolf–Rayet star in a binary as a precursor to a BH–BH binary? (2026)
- Publications- Astronomical Society of Japan
Maeda, Keiichi; Kuncarayakti, Hanindyo; Nagao, Takashi; Kawabata, Miho; Taguchi, Kenta; Uno, Kohki; De, Kishalay
(A1 Refereed original research article in a scientific journal)
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 Refereed original research article in a scientific journal)
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 Refereed original research article in a scientific journal)
NUTS Transient Classification Report for 2025-03-18 #1035 (2025) Transient name server Classification report 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 Article in a professional compilation book)
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 Refereed original research article in a scientific journal)