Search Results - "Nagoshi, Shumpei"

The relation between quasars’ optical spectra and variability by Nagoshi, Shumpei, Iwamuro, Fumihide

“…Abstract Brightness variation is an essential feature of quasars, but its mechanism and relationship to other physical quantities are not understood well. We…”
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Discovery of new changing-look quasar 3C 332 and constraints for a double-peaked emission line scenario by Wada, Kazuma, Iwamuro, Fumihide, Nagoshi, Shumpei, Saito, Tomoki

“…Abstract Recently, a new class of quasars, called changing-look quasars (CLQs), has been reported. CLQs exhibit significant changes in optical and mid-infrared…”
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Spectroscopic and photometric observations of dwarf nova superoutbursts by the 3.8 m telescope Seimei and the Variable Star Network by Tampo, Yusuke, Isogai, Keisuke, Kojiguchi, Naoto, Maehara, Hiroyuki, Taguchi, Kenta, Kato, Taichi, Kimura, Mariko, Wakamatsu, Yasuyuki, Shibata, Masaaki, Nogami, Daisaku, Kawabata, Miho, Maeda, Keiichi, Namekata, Kosuke, Okamoto, Soshi, Otsuka, Masaaki, Burgaz, Umut, Nagoshi, Shumpei, Itoh, Hiroshi, Vanmunster, Tonny, Tordai, Tamás, Stone, Geoffrey, Matsumoto, Katsura, Fujii, Daiti, Matsumura, Ryota, Nakagawa, Momoka, Takeuchi, Nodoka, Zenkou, Yuki, Pavlenko, Elena P, Antonyuk, Kirill A, Pit, Nikolaj V, Antonyuk, Oksana I, Babina, Julia V, Baklanov, Aleksei V, Sosnovskij, Aleksei A, Shugarov, Sergey Yu, Katysheva, Nataly, Chochol, Drahomír, Dvorak, Shawn, Dubovsky, Pavol A, Medulka, Tomáš, Kudzej, Igor, Kiyota, Seiichiro, Zubareva, Alexandra M, Belinski, Alexandr A, Ikonnikova, Natalia P, Burlak, Marina A, Sano, Yasuo, Mizutani, Masanori, Ruiz, Javier, D. Pickard, Roger, Hambsch, Franz-Josef, Dufoer, Sjoerd, Brincat, Stephen M, Galdies, Charles, Menzies, Kenneth, Moriyama, Masayuki, Hiraga, Mitsutaka, Maeda, Yutaka, Hirosawa, Kenji, Funada, Masao, Yamamoto, Minoru

“…Abstract We present spectroscopic and photometric observations of 17 dwarf-nova superoutbursts obtained by KOOLS-IFU mounted on the 3.8 m telescope Seimei at…”
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The relation between quasars’ optical spectra and variability by Nagoshi, Shumpei, Iwamuro, Fumihide

“…Abstract Brightness variation is an essential feature of quasars, but its mechanism and relationship to other physical quantities are not understood well. We…”
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Discovery of a new extreme changing-state quasar with 4 mag variation, SDSS J125809.31+351943.0 by Nagoshi, Shumpei, Iwamuro, Fumihide, Wada, Kazuma, Saito, Tomoki

“…Abstract We report the discovery of a quasar, SDSS J125809.31+351943.0 (J1258), which brightened in optical wavelengths for 4 mag from 1983 to 2015: one of the…”
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Probing the origin of the two-component structure of broad-line region by reverberation mapping of an extremely variable quasar by Nagoshi, Shumpei, Iwamuro, Fumihide, Yamada, Satoshi, Ueda, Yoshihiro, Oikawa, Yuto, Otsuka, Masaaki, Isogai, Keisuke, Mineshige, Shin

“…ABSTRACT The physical origins of quasar components, such as the broad-line region (BLR) and dust torus, remain under debate. To gain insights into them, we…”
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The relation between quasars' optical spectra and variability by Nagoshi, Shumpei, Iwamuro, Fumihide

“…This work aimed to find the relationship between quasars' optical variability and spectral features to reveal the regularity behind the random variation. It is…”
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Discovery of a new extreme changing-state quasar with 4 mag variation, SDSS J125809.31+351943.0 by Nagoshi, Shumpei, Iwamuro, Fumihide, Wada, Kazuma, Saito, Tomoki

“…We report the discovery of a quasar, SDSS J125809.31+351943.0 (J1258), which brightened in optical for 4 mag from 1983 to 2015, which is one of the largest…”
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Probing the origin of the two-component structure of broad line region by reverberation mapping of an extremely variable quasar by Nagoshi, Shumpei, Iwamuro, Fumihide, Yamada, Satoshi, Ueda, Yoshihiro, Oikawa, Yuto, Otsuka, Masaaki, Isogai, Keisuke, Mineshige, Shin

“…The physical origins of quasar components, such as the broad line region (BLR) and dust torus, remain under debate. To gain insights into them, we focused on…”
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Spectroscopic and Photometric Observations of Dwarf Nova Superoutbursts by the 3.8 m Telescope Seimei and the Variable Star Network by Tampo, Yusuke, Isogai, Keisuke, Kojiguchi, Naoto, Maehara, Hiroyuki, Taguchi, Kenta, Kato, Taichi, Kimura, Mariko, Wakamatsu, Yasuyuki, Shibata, Masaaki, Nogami, Daisaku, Kawabata, Miho, Maeda, Keiichi, Namekata, Kosuke, Okamoto, Soshi, Otsuka, Masaaki, Umut, Burgaz, Nagoshi, Shumpei, Itoh, Hiroshi, Vanmunster, Tonny, Tordai, Tamas, Stone, Geoffrey, Matsumoto, Katsura, Fujii, Daiti, Matsumura, Ryota, Nakagawa, Momoka, Takeuchi, Nodoka, Zenkou, Yuki, Pavlenko, Elena P, Antonyuk, Kirill A, Pit, Nikolaj V, Antonyuk, Oksana I, Babina, Julia V, Baklanov, Aleksei V, Sosnovskij, Aleksei A, Shugarov, Sergey Yu, Katysheva, Nataly, Chochol, Drahomir, Dvorak, Shawn, Dubovsky, Pavol A, Medulka, Tomas, Kudzej, Igor, Kiyota, Seiichiro, Zubareva, Alexandra M, Belinski, Alexandr A, Ikonnikova, Natalia P, Burlak, Marina A, Sano, Yasuo, Mizutani, Masanori, Ruiz, Javier, pickard, Roger D, Franz-josef, Hambsch, Dufoer, Sjoerd, Brincat, Stephen M, Galdies, Charles, Menzies, Kenneth, Moriyama, Masayuki, Hiraga, Mitsutaka, Maeda, Yutaka, Hirosawa, Kenji, Funada, Masao, Yamamoto, Minoru

“…We present spectroscopic and photometric observations of 17 dwarf-nova superoutbursts obtained by KOOLS-IFU mounted on the 3.8 m telescope Seimei at Okayama…”
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