Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Terao, Koki"'
Autor:
Ogane, Hajime, Ono, Yoshito, Minowa, Yosuke, Oya, Shin, Terao, Koki, Akasawa, Takumi, Homan, Riki, Akiyama, Masayuki
Atmospheric turbulence profile plays an important role in designing and operating adaptive optics (AO) systems with multiple laser guide stars. To obtain representative free atmospheric profiles and resolved ground layer profiles for future AO system
Externí odkaz:
http://arxiv.org/abs/2310.09564
Autor:
Noboriguchi, Akatoki, Nagao, Tohru, Toba, Yoshiki, Ichikawa, Kohei, Kajisawa, Masaru, Kato, Nanako, Kawaguchi, Toshihiro, Matsuhara, Hideo, Matsuoka, Yoshiki, Onishi, Kyoko, Onoue, Masafusa, Tamada, Nozomu, Terao, Koki, Terashima, Yuichi, Ueda, Yoshihiro, Yamashita, Takuji
We report optical spectroscopic observations of four blue-excess dust-obscured galaxies (BluDOGs) identified by Subaru Hyper Suprime-Cam. BluDOGs are a sub-class of dust-obscured galaxies (DOGs, defined with the extremely red color $(i-[22])_{\rm AB}
Externí odkaz:
http://arxiv.org/abs/2211.16748
Autor:
Toba, Yoshiki, Yamada, Satoshi, Matsubayashi, Kazuya, Terao, Koki, Moriya, Aoi, Ueda, Yoshihiro, Ohta, Kouji, Hashiguchi, Aoi, Himoto, Kazuharu G., Izumiura, Hideyuki, Joh, Kazuma, Kato, Nanako, Koyama, Shuhei, Maehara, Hiroyuki, Misato, Rana, Noboriguchi, Akatoki, Ogawa, Shoji, Ota, Naomi, Shibata, Mio, Tamada, Nozomu, Yanagawa, Anri, Yonekura, Naoki, Nagao, Tohru, Akiyama, Masayuki, Kajisawa, Masaru, Matsuoka, Yoshiki
We present ionized gas properties of 9 local ultra/luminous infrared galaxies (U/LIRGs) at $z <$ 0.04 through IFU observations with KOOLS-IFU on Seimei Telescope. The observed targets are drawn from the Great Observatories All-sky LIRG Survey (GOALS)
Externí odkaz:
http://arxiv.org/abs/2208.11824
Autor:
Terao, Koki, Nagao, Tohru, Onishi, Kyoko, Matsuoka, Kenta, Akiyama, Masayuki, Matsuoka, Yoshiki, Yamashita, Takuji
In this paper, we utilize high-quality rest-UV spectra of three radio galaxies at $z \sim$ 3 observed with VLT/FORS2 to measure the flux of several emission lines including relatively faint ones, such as NIV]$\lambda$1486, OIII]$\lambda$1663, and [Ne
Externí odkaz:
http://arxiv.org/abs/2203.03390
The narrow-line region (NLR) consists of gas clouds ionized by the strong radiation from the active galactic nucleus (AGN), distributed in the spatial scale of AGN host galaxies. The strong emission lines from the NLR are useful to diagnose physical
Externí odkaz:
http://arxiv.org/abs/2106.13971
Autor:
Matsuoka, Kenta, Nagao, Tohru, Marconi, Alessandro, Maiolino, Roberto, Mannucci, Filippo, Cresci, Giovanni, Terao, Koki, Ikeda, Hiroyuki
The mass-metallicity relation (MZR) of type-2 active galactic nuclei (AGNs) at 1.2 < z < 4.0 is investigated by using high-z radio galaxies (HzRGs) and X-ray selected radio-quiet AGNs. We combine new rest-frame ultraviolet (UV) spectra of two radio-q
Externí odkaz:
http://arxiv.org/abs/1807.09276
Autor:
Schulze, Andreas, Schramm, Malte, Zuo, Wenwen, Wu, Xue-Bing, Urrutia, Tanya, Kotilainen, Jari, Reynolds, Thomas, Terao, Koki, Nagao, Tohru, Izumiura, Hideyuki
We present near-IR spectroscopy of 22 luminous low-ionization broad absorption line quasars (LoBAL QSOs) at redshift 1.3
Externí odkaz:
http://arxiv.org/abs/1709.06335
Publikováno v:
The Astrophysical Journal, 842 (2017) 44-57
Low-metallicity active galactic nuclei (AGNs) are interesting to study the early phase of the AGN evolution. However most AGNs are chemically matured and accordingly low-metallicity AGNs are extremely rare. One approach to search for low-metallicity
Externí odkaz:
http://arxiv.org/abs/1707.08731
Autor:
Terao, Koki, Nagao, Tohru, Hashimoto, Tetsuya, Yanagisawa, Kenshi, Matsuoka, Kenta, Toba, Yoshiki, Ikeda, Hiroyuki, Taniguchi, Yoshiaki
One of the unsettled, important problems in active galactic nuclei (AGNs) is the major ionization mechanism of gas clouds in their narrow-line regions (NLRs). In order to investigate this issue, we present our $J$-band spectroscopic observations for
Externí odkaz:
http://arxiv.org/abs/1610.05978
Autor:
Jackson, Kathryn J., Schmidt, Dirk, Vernet, Elise, Herrald, Nicholas, Minowa, Yosuke, Tanaka, Yoko, Ogane, Hajime, Ono, Yoshito, Terao, Koki, D'Orgeville, Celine, Chandler, David, Haynes, Dionne, Martinez, Noelia, Wang, Lu
Publikováno v:
Proceedings of SPIE; August 2024, Vol. 13097 Issue: 1 p130975N-130975N-7, 1178783p
