Zobrazeno 1 - 10
of 356
pro vyhledávání: '"Kawaguchi, Toshihiro"'
Autor:
Onoue, Masafusa, Ding, Xuheng, Silverman, John D., Matsuoka, Yoshiki, Izumi, Takuma, Strauss, Michael A., Ward, Charlotte, Phillips, Camryn L., Andika, Irham T., Aoki, Kentaro, Arita, Junya, Baba, Shunsuke, Bieri, Rebekka, Bosman, Sarah E. I., Eilers, Anna-Christina, Fujimoto, Seiji, Habouzit, Melanie, Haiman, Zoltan, Imanishi, Masatoshi, Inayoshi, Kohei, Ito, Kei, Iwasawa, Kazushi, Jahnke, Knud, Kashikawa, Nobunari, Kawaguchi, Toshihiro, Kohno, Kotaro, Lee, Chien-Hsiu, Li, Junyao, Lupi, Alessandro, Lyu, Jianwei, Nagao, Tohru, Overzier, Roderik, Schindler, Jan-Torge, Schramm, Malte, Scoggins, Matthew T., Shimasaku, Kazuhiro, Toba, Yoshiki, Trakhtenbrot, Benny, Trebitsch, Maxime, Treu, Tommaso, Umehata, Hideki, Venemans, Bram, Vestergaard, Marianne, Volonteri, Marta, Walter, Fabian, Wang, Feige, Yang, Jinyi, Zhang, Haowen
Understanding the rapid formation of supermassive black holes (SMBHs) in the early universe requires an understanding of how stellar mass grows in the host galaxies. Here, we perform an analysis of rest-frame optical spectra and imaging from JWST of
Externí odkaz:
http://arxiv.org/abs/2409.07113
Autor:
Tang, Shenli, Silverman, John D., Liu, Zhaoxuan, Banerji, Manda, Suzuki, Tomoko, Fujimoto, Seiji, Goulding, Andy, Imanishi, Masatoshi, Kawaguchi, Toshihiro, Bottrell, Connor, Hartwig, Tilman, Jahnke, Knud, Onoue, Masafusa, Schramm, Malte, Ueda, Yoshihiro
We present a study of the molecular gas in five closely-spaced ($R_{\perp}<20$ kpc) dual quasars ($L_{\rm bol}\gtrsim10^{44}~\mathrm{erg~s}^{-1}$) at redshifts $0.4
Externí odkaz:
http://arxiv.org/abs/2407.09399
Autor:
Izumi, Takuma, Matsuoka, Yoshiki, Onoue, Masafusa, Strauss, Michael A., Umehata, Hideki, Silverman, John D., Nagao, Tohru, Imanishi, Masatoshi, Kohno, Kotaro, Toba, Yoshiki, Iwasawa, Kazushi, Nakanishi, Kouichiro, Sawamura, Mahoshi, Fujimoto, Seiji, Kikuta, Satoshi, Kawaguchi, Toshihiro, Aoki, Kentaro, Goto, Tomotsugu
We present ALMA [CII] 158 $\mu$m line and underlying far-infrared (FIR) continuum emission observations ($0''.57 \times 0''.46$ resolution) toward a quasar-quasar pair system recently discovered at $z = 6.05$ (Matsuoka et al. 2024). The quasar nuclei
Externí odkaz:
http://arxiv.org/abs/2405.02468
Autor:
Matsuoka, Yoshiki, Izumi, Takuma, Onoue, Masafusa, Strauss, Michael A., Iwasawa, Kazushi, Kashikawa, Nobunari, Akiyama, Masayuki, Aoki, Kentaro, Arita, Junya, Imanishi, Masatoshi, Ishimoto, Rikako, Kawaguchi, Toshihiro, Kohno, Kotaro, Lee, Chien-Hsiu, Nagao, Tohru, Silverman, John D., Toba, Yoshiki
Publikováno v:
The Astrophysical Journal Letters, Volume 965, Issue 1, id.L4, 8 pp (2024)
We report the discovery of two quasars at a redshift of $z$ = 6.05, in the process of merging. They were serendipitously discovered from the deep multi-band imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey. The qu
Externí odkaz:
http://arxiv.org/abs/2405.02465
Autor:
He, Wanqiu, Akiyama, Masayuki, Enoki, Motohiro, Ichikawa, Kohei, Inayoshi, Kohei, Kashikawa, Nobunari, Kawaguchi, Toshihiro, Matsuoka, Yoshiki, Nagao, Tohru, Onoue, Masafusa, Oogi, Taira, Schulze, Andreas, Toba, Yoshiki, Ueda, Yoshihiro
We investigate the black hole mass function (BHMF) and Eddington ratio distribution function (ERDF) of broad-line AGNs at z=4, based on a sample of 52 quasars with i<23.2 at 3.50 < z < 4.25 from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP
Externí odkaz:
http://arxiv.org/abs/2311.08922
Autor:
Takahashi, Ayumi, Matsuoka, Yoshiki, Onoue, Masafusa, Strauss, Michael A., Kashikawa, Nobunari, Toba, Yoshiki, Iwasawa, Kazushi, Imanishi, Masatoshi, Akiyama, Masayuki, Kawaguchi, Toshihiro, Noboriguchi, Akatoki, Lee, Chien-Hsiu
We report the distribution of black hole (BH) masses and Eddingont ratios estimated for a sample of 131 low luminosity quasars in the early cosmic epoch ($5.6 < z < 7.0$). Our work is based on Subaru High-$z$ Exploration of Low-Luminosity Quasars (SH
Externí odkaz:
http://arxiv.org/abs/2310.12222
Autor:
Matsuoka, Yoshiki, Onoue, Masafusa, Iwasawa, Kazushi, Strauss, Michael A., Kashikawa, Nobunari, Izumi, Takuma, Nagao, Tohru, Imanishi, Masatoshi, Akiyama, Masayuki, Silverman, John D., Asami, Naoko, Bosch, James, Furusawa, Hisanori, Goto, Tomotsugu, Gunn, James E., Harikane, Yuichi, Ikeda, Hiroyuki, Inayoshi, Kohei, Ishimoto, Rikako, Kawaguchi, Toshihiro, Kikuta, Satoshi, Kohno, Kotaro, Komiyama, Yutaka, Lee, Chien-Hsiu, Lupton, Robert H., Minezaki, Takeo, Miyazaki, Satoshi, Murayama, Hitoshi, Nishizawa, Atsushi J., Oguri, Masamune, Ono, Yoshiaki, Oogi, Taira, Ouchi, Masami, Price, Paul A., Sameshima, Hiroaki, Sugiyama, Naoshi, Tait, Philip J., Takada, Masahiro, Takahashi, Ayumi, Takata, Tadafumi, Tanaka, Masayuki, Toba, Yoshiki, Wang, Shiang-Yu, Yamashita, Takuji
We present the quasar luminosity function (LF) at $z = 7$, measured with 35 spectroscopically confirmed quasars at $6.55 < z < 7.15$. The sample of 22 quasars from the Subaru High-$z$ Exploration of Low-Luminosity Quasars (SHELLQs) project, combined
Externí odkaz:
http://arxiv.org/abs/2305.11225
Autor:
Hatano, Shun, Ouchi, Masami, Umeda, Hiroya, Nakajima, Kimihiko, Kawaguchi, Toshihiro, Isobe, Yuki, Aoyama, Shohei, Watanabe, Kuria, Harikane, Yuichi, Kusakabe, Haruka, Matsumoto, Akinori, Moriya, Takashi J., Nishigaki, Moka, Ono, Yoshiaki, Onodera, Masato, Sugahara, Yuma, Suzuki, Akihiro, Xu, Yi, Zhang, Yechi
We present ionizing spectra estimated at 13.6--100 eV for ten dwarf galaxies with strong high ionization lines of He {\sc {ii}}$\lambda$4686 and [Ne {\sc{v}}]$\lambda$3426 ([Ne {\sc{iv}}]$\lambda$2424) at $z=0$ ($z=8$) that are identified in our Keck
Externí odkaz:
http://arxiv.org/abs/2305.02189
Autor:
Tang, Shenli, Silverman, John D., Yesuf, Hassen M., Ding, Xuheng, Li, Junyao, Bottrell, Connor, Goulding, Andy, Omori, Kiyoaki Christopher, Toba, Yoshiki, Kawaguchi, Toshihiro
Publikováno v:
MNRAS, volume 521, number 4, pages 5272--5297 (2023)
How does the host galaxy morphology influence a central quasar or vice versa? We address this question by measuring the asymmetries of 2424 SDSS quasar hosts at $0.2
Externí odkaz:
http://arxiv.org/abs/2304.06090
Autor:
Hatano, Shun, Ouchi, Masami, Nakajima, Kimihiko, Kawaguchi, Toshihiro, Kokubo, Mitsuru, Kikuta, Satoshi, Tominaga, Nozomu, Xu, Yi, Watanabe, Kuria, Harikane, Yuichi, Isobe, Yuki, Matsumoto, Akinori, Nishigaki, Moka, Ono, Yoshiaki, Onodera, Masato, Sugahara, Yuma, Umeda, Hiroya, Zhang, Yechi
Since the late 20th century, young star-forming dwarf galaxies with extremely low heavy-element abundances have been identified in the local universe\cite{1972ApJ...173...25S, 1990Natur.343..238I, 2022ApJS..262....3N}. Such a population of galaxies,
Externí odkaz:
http://arxiv.org/abs/2304.03726