Zobrazeno 1 - 10
of 196
pro vyhledávání: '"Takashi J Moriya"'
Autor:
Seiji Toshikage, Masaomi Tanaka, Naoki Yasuda, Takashi J. Moriya, Ichiro Takahashi, Ji-an Jiang, Mitsuru Kokubo, Naoki Matsumoto, Keiichi Maeda, Tomoki Morokuma, Nao Suzuki, Nozomu Tominaga
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 18 (2024)
Recent high-cadence transient surveys have discovered rapid transients whose light-curve timescales are shorter than those of typical supernovae (SNe). In this paper, we present a systematic search for rapid transients at medium-high redshifts among
Externí odkaz:
https://doaj.org/article/8005894e0ce74d5caa1e677093851392
Autor:
Avinash Singh, Rishabh Singh Teja, Takashi J. Moriya, Keiichi Maeda, Koji S Kawabata, Masaomi Tanaka, Ryo Imazawa, Tatsuya Nakaoka, Anjasha Gangopadhyay, Masayuki Yamanaka, Vishwajeet Swain, D. K. Sahu, G. C. Anupama, Brajesh Kumar, Ramya M. Anche, Yasuo Sano, A. Raj, V. K. Agnihotri, Varun Bhalerao, D. Bisht, M. S. Bisht, K. Belwal, S. K. Chakrabarti, Mitsugu Fujii, Takahiro Nagayama, Katsura Matsumoto, Taisei Hamada, Miho Kawabata, Amit Kumar, Ravi Kumar, Brian K. Malkan, Paul Smith, Yuta Sakagami, Kenta Taguchi, Nozomu Tominaga, Arata Watanabe
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 132 (2024)
We present a detailed investigation of photometric, spectroscopic, and polarimetric observations of the Type II SN 2023ixf. Earlier studies have provided compelling evidence for a delayed shock breakout from a confined dense circumstellar matter (CSM
Externí odkaz:
https://doaj.org/article/1d1aaeee19fd481f8123537eeef70a37
Autor:
Ryotaro Chiba, Takashi J. Moriya
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 14 (2024)
Interaction between supernova (SN) ejecta and dense circumstellar medium (CSM) with a flat density structure ( ρ ∝ r ^− ^s , s < 1.5) was recently proposed as a possible mechanism behind interacting SNe that exhibit exceptionally long rise times
Externí odkaz:
https://doaj.org/article/699bcaaeb61242f5b6b6a35b917b6231
Autor:
Masato Sato, Nozomu Tominaga, Sergei I. Blinnikov, Marat Sh. Potashov, Takashi J. Moriya, Daichi Hiramatsu
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 163 (2024)
Core-collapse supernovae (CCSNe) are the terminal explosions of massive stars. While most massive stars explode as iron-core-collapse supernovae (FeCCSNe), slightly less massive stars explode as electron-capture supernovae (ECSNe), shaping the low-ma
Externí odkaz:
https://doaj.org/article/1d5e2edc1b8b47cd92b08f4fceccdc11
Autor:
Javier Silva-Farfán, Francisco Förster, Takashi J. Moriya, L. Hernández-García, A. M. Muñoz Arancibia, P. Sánchez-Sáez, Joseph P. Anderson, John L. Tonry, Alejandro Clocchiatti
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 57 (2024)
We report an analysis of a sample of 186 spectroscopically confirmed Type II supernova (SN) light curves (LCs) obtained from a combination of Zwicky Transient Facility (ZTF) and Asteroid Terrestrial-impact Last Alert System observations. We implement
Externí odkaz:
https://doaj.org/article/8409fff9b91f4b1fa899e807d1312692
Autor:
Yashvi Sharma, Jesper Sollerman, Shrinivas R. Kulkarni, Takashi J. Moriya, Steve Schulze, Stan Barmentloo, Michael Fausnaugh, Avishay Gal-Yam, Anders Jerkstrand, Tomás Ahumada, Eric C. Bellm, Kaustav K. Das, Andrew Drake, Christoffer Fremling, David Hale, Saarah Hall, K. R. Hinds, Theophile Jegou du Laz, Viraj Karambelkar, Mansi M. Kasliwal, Frank J. Masci, Adam A. Miller, Guy Nir, Daniel A. Perley, Josiah N. Purdum, Yu-Jing Qin, Nabeel Rehemtulla, R. Michael Rich, Reed L. Riddle, Antonio C. Rodriguez, Sam Rose, Jean Somalwar, Jacob L. Wise, Avery Wold, Lin Yan, Yuhan Yao
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 199 (2024)
Multipeaked supernovae with precursors, dramatic light-curve rebrightenings, and spectral transformation are rare, but are being discovered in increasing numbers by modern night-sky transient surveys like the Zwicky Transient Facility. Here, we prese
Externí odkaz:
https://doaj.org/article/f7276a25b8c0403e8610026a5c48e899
Autor:
Shun Hatano, Masami Ouchi, Hiroya Umeda, Kimihiko Nakajima, Toshihiro Kawaguchi, Yuki Isobe, Shohei Aoyama, Kuria Watanabe, Yuichi Harikane, Haruka Kusakabe, Akinori Matsumoto, Takashi J. Moriya, Moka Nishigaki, Yoshiaki Ono, Masato Onodera, Yuma Sugahara, Akihiro Suzuki, Yi Xu, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 170 (2024)
We present ionizing spectra estimated at 13.6–100 eV for 10 dwarf galaxies with strong high-ionization lines of He ii λ 4686 and [Ne v ] λ 3426 ([Ne iv ] λ 2424) at z = 0 ( z = 8) that are identified in our Keck/LRIS spectroscopy and the literat
Externí odkaz:
https://doaj.org/article/4802614fdb8d4f74856dc35a64b04595
Autor:
Kuria Watanabe, Masami Ouchi, Kimihiko Nakajima, Yuki Isobe, Nozomu Tominaga, Akihiro Suzuki, Miho N. Ishigaki, Ken’ichi Nomoto, Koh Takahashi, Yuichi Harikane, Shun Hatano, Haruka Kusakabe, Takashi J. Moriya, Moka Nishigaki, Yoshiaki Ono, Masato Onodera, Yuma Sugahara
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 50 (2024)
We present gas-phase elemental abundance ratios of thirteen local extremely metal-poor galaxies (EMPGs), including our new Keck/LRIS spectroscopy determinations together with 33 James Webb Space Telescope z ∼ 4–10 star-forming galaxies in the lit
Externí odkaz:
https://doaj.org/article/6635069359c34b39a702013d4d0143f9
Autor:
Yi Xu, Masami Ouchi, Yuki Isobe, Kimihiko Nakajima, Shinobu Ozaki, Nicolas F. Bouché, John H. Wise, Eric Emsellem, Haruka Kusakabe, Takashi Hattori, Tohru Nagao, Gen Chiaki, Hajime Fukushima, Yuichi Harikane, Kohei Hayashi, Yutaka Hirai, Ji Hoon Kim, Michael V. Maseda, Kentaro Nagamine, Takatoshi Shibuya, Yuma Sugahara, Hidenobu Yajima, Shohei Aoyama, Seiji Fujimoto, Keita Fukushima, Shun Hatano, Akio K. Inoue, Tsuyoshi Ishigaki, Masahiro Kawasaki, Takashi Kojima, Yutaka Komiyama, Shuhei Koyama, Yusei Koyama, Chien-Hsiu Lee, Akinori Matsumoto, Ken Mawatari, Takashi J. Moriya, Kentaro Motohara, Kai Murai, Moka Nishigaki, Masato Onodera, Yoshiaki Ono, Michael Rauch, Tomoki Saito, Rin Sasaki, Akihiro Suzuki, Tsutomu T. Takeuchi, Hiroya Umeda, Masayuki Umemura, Kuria Watanabe, Kiyoto Yabe, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 49 (2024)
We present the demography of the dynamics and gas mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of 0.015–0.195 Z _⊙ and low stellar masses of 10 ^4 –10 ^8 M _⊙ in the local universe. We conduct deep optical inte
Externí odkaz:
https://doaj.org/article/676be6f7cd2249aeae362e439f3fe5f9
Autor:
Shubham Srivastav, T. Moore, M. Nicholl, M. R. Magee, S. J. Smartt, M. D. Fulton, S. A. Sim, J. M. Pollin, L. Galbany, C. Inserra, A. Kozyreva, Takashi J. Moriya, F. P. Callan, X. Sheng, K. W. Smith, J. S. Sommer, J. P. Anderson, M. Deckers, M. Gromadzki, T. E. Müller-Bravo, G. Pignata, A. Rest, D. R. Young
Publikováno v:
The Astrophysical Journal Letters, Vol 956, Iss 2, p L34 (2023)
We present optical photometric and spectroscopic observations of the 02es-like type Ia supernova (SN) 2022ywc. The transient occurred in the outskirts of an elliptical host galaxy and showed a striking double-peaked light curve with an early excess f
Externí odkaz:
https://doaj.org/article/fc0161952c554de3a5563511b4151686