Takashi Nagao

Observational diversity of bright long-lived Type II supernovae

T. Nagao, T. M. Reynolds, H. Kuncarayakti, R. Cartier, S. Mattila, K. Maeda, J. Sollerman, P. J. Pessi, J. P. Anderson, C. Inserra, T. W. Chen, L. Ferrari, M. Fraser, D. R. Young, M. Gromadzki, C. P. Gutiérrez, P. Lundqvist, G. Pignata, T. E. Müller-Bravo, F. Ragosta, A. Reguitti, S. Moran, M. González-Bañuelos, M. Kopsacheili, T. Petrushevska 2025 Astronomy & Astrophysics

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

P. J. Pessi, R. Lunnan, J. Sollerman, L. Yan, A. Le Reste, Y. Yao, S. Nordblom, Y. Sharma, M. Gilfanov, R. Sunyaev, S. Schulze, J. Johansson, A. Gangopadhyay, C. Fremling, K. Tristram, M. J. Hayes, C. Fransson, Y. Hu, S. J. Brennan, S. Rose, K. De, K. R. Hinds, C. Liu, A. A. Miller, Y. J. Qin, P. Charalampopoulos, A. Gkini, M. J. Graham, C. P. Gutiérrez, S. Mattila, T. Nagao, I. Pérez-Fournon, F. Poidevin, J. S. Bloom, J. Brugger, T. X. Chen, M. M. Kasliwal, F. J. Masci, J. N. Purdum 2025 Monthly Notices of the Royal Astronomical Society

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

M. Pursiainen, T. L. Killestein, H. Kuncarayakti, P. Charalampopoulos, B. Warwick, J. Lyman, R. Kotak, G. Leloudas, D. Coppejans, T. Kravtsov, K. Maeda, T. Nagao, K. Taguchi, K. Ackley, V. S. Dhillon, D. K. Galloway, A. Kumar, D. O’Neill, G. Ramsay, D. Steeghs 2025 Monthly Notices of the Royal Astronomical Society

The bright long-lived Type II SN 2021irp powered by aspherical circumstellar material interaction II. Estimating the CSM mass and geometry with polarimetry and light curve modeling

T. M. Reynolds, T. Nagao, K. Maeda, N. Elias-Rosa, M. Fraser, C. Gutiérrez, T. Kangas, H. Kuncarayakti, S. Mattila, P. J. Pessi 2025 Astronomy and Astrophysics

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

T. M. Reynolds, T. Nagao, R. Gottumukkala, C. P. Gutiérrez, T. Kangas, T. Kravtsov, H. Kuncarayakti, K. Maeda, N. Elias-Rosa, M. Fraser, R. Kotak, S. Mattila, A. Pastorello, P. J. Pessi, Y. Z. Cai, J. P.U. Fynbo, M. Kawabata, P. Lundqvist, K. Matilainen, S. Moran, A. Reguitti, K. Taguchi, M. Yamanaka 2025 Astronomy and Astrophysics

Spectropolarimetry of a Nuclear Transient AT2023clx: Revealing the Geometrical Alignment between the Transient Outflow and the Nuclear Dusty Region

Kohki Uno, Keiichi Maeda, Takashi Nagao, Giorgos Leloudas, Panos Charalampopoulos, Seppo Mattila, Kentaro Aoki, Kenta Taguchi, Miho Kawabata, Javier Moldon, Miguel Pérez-Torres, Miika Pursiainen, Thomas Reynolds 2025 Astrophysical Journal Letters

An aspherical distribution for the explosive burning ash of core-collapse supernovae

Qiliang Fang, Keiichi Maeda, Hanindyo Kuncarayakti, Takashi Nagao 2024 Nature Astronomy

The metamorphosis of the Type Ib SN 2019yvr: late-time interaction

Lucía Ferrari, Gastón Folatelli, Hanindyo Kuncarayakti, Maximilian Stritzinger, Keiichi Maeda, Melina Bersten, Lili M. Román Aguilar, M. Manuela Sáez, Luc Dessart, Peter Lundqvist, Paolo Mazzali, Takashi Nagao, Chris Ashall, Subhash Bose, Seán J. Brennan, Yongzhi Cai, Rasmus Handberg, Simon Holmbo, Emir Karamehmetoglu, Andrea Pastorello, Andrea Reguitti, Joseph Anderson, Ting Wan Chen, Lluís Galbany, Mariusz Gromadzki, Claudia P. Gutiérrez, Cosimo Inserra, Erkki Kankare, Tomás E. Müller Bravo, Seppo Mattila, Matt Nicholl, Giuliano Pignata, Jesper Sollerman, Shubham Srivastav, David R. Young 2024 Monthly Notices of the Royal Astronomical Society: Letters

The enigmatic double-peaked stripped-envelope SN 2023aew

T. Kangas, H. Kuncarayakti, T. Nagao, R. Kotak, E. Kankare, M. Fraser, H. Stevance, S. Mattila, K. Maeda, M. Stritzinger, P. Lundqvist, N. Elias-Rosa, L. Ferrari, G. Folatelli, C. Frohmaier, L. Galbany, M. Kawabata, E. Koutsiona, T. E. Müller-Bravo, L. Piscarreta, M. Pursiainen, A. Singh, K. Taguchi, R. S. Teja, G. Valerin, A. Pastorello, S. Benetti, Y. Z. Cai, P. Charalampopoulos, C. P. Gutiérrez, T. Kravtsov, A. Reguitti 2024 Astronomy & Astrophysics

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

Yuta Murai, Masaomi Tanaka, Miho Kawabata, Kenta Taguchi, Rishabh Singh Teja, Tatsuya Nakaoka, Keiichi Maeda, Koji S. Kawabata, Takashi Nagao, Takashi J. Moriya, D. K. Sahu, G. C. Anupama, Nozomu Tominaga, Tomoki Morokuma, Ryo Imazawa, Satoko Inutsuka, Keisuke Isogai, Toshihiro Kasuga, Naoto Kobayashi, Sohei Kondo, Hiroyuki Maehara, Yuki Mori, Yuu Niino, Mao Ogawa, Ryou Ohsawa, Shin Ichiro Okumura, Sei Saito, Shigeyuki Sako, Hidenori Takahashi, Kohki Uno, Masayuki Yamanaka 2024 Monthly Notices of the Royal Astronomical Society

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