Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Youichi Ohyama"'
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 42 (2024)
We set the stage for reassessing how star formation, emission-line nebulae, and active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs) depend on the thermodynamics of the intracluster medium (ICM). Our work is based on the 25 clusters obs
Externí odkaz:
https://doaj.org/article/0e0efd63c6a34bfcb909c45d29358c52
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 142 (2023)
Galactic winds play essential roles in the evolution of galaxies through the feedback they provide. Despite intensive studies of winds, the radial distributions of their properties and feedback are rarely observable. Here we present such measurements
Externí odkaz:
https://doaj.org/article/fd31234128404c37bcea3f9c1828d5db
Autor:
Youichi Ohyama, Shusuke Onishi, Takao Nakagawa, Kosei Matsumoto, Naoki Isobe, Mai Shirahata, Shunsuke Baba, Kazushi Sakamoto
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 87 (2023)
We investigated the inner buried nucleus of a nearby luminous infrared galaxy, NGC 4418, using high-resolution spectroscopy of fundamental carbon monoxide (CO) rovibrational absorptions around 4.67 μ m for the first time. This method allowed us to e
Externí odkaz:
https://doaj.org/article/ff5df09a6c1942a3b72bf926779e193d
Autor:
Michihiro Takami, Hans Moritz Günther, P. Christian Schneider, Tracy L. Beck, Jennifer L. Karr, Youichi Ohyama, Roberto Galván-Madrid, Taichi Uyama, Marc White, Konstantin Grankin, Deirdre Coffey, Chun-Fan Liu, Misato Fukagawa, Nadine Manset, Wen-Ping Chen, Tae-Soo Pyo, Hsien Shang, Thomas P. Ray, Masaaki Otsuka, Mei-Yin Chou
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 264, Iss 1, p 1 (2022)
We present Gemini-NIFS, Very Large Telescope-SINFONI, and Keck-OSIRIS observations of near-IR [Fe ii ] emission that are associated with well-studied jets from three active T Tauri stars—RW Aur A, RY Tau, and DG Tau—taken from 2012 to 2021. We pr
Externí odkaz:
https://doaj.org/article/87be1dd005bb4eb3bc69f4b8243d7a00
Autor:
Taichi Uyama, Michihiro Takami, Gabriele Cugno, Vincent Deo, Olivier Guyon, Jun Hashimoto, Julien Lozi, Barnaby Norris, Motohide Tamura, Sebastien Vievard, Hans Moritz Günther, P. Christian Schneider, Eiji Akiyama, Tracy L. Beck, Thayne Currie, Klaus Hodapp, Jungmi Kwon, Satoshi Mayama, Youichi Ohyama, Tae-Soo Pyo, John P. Wisniewski
Publikováno v:
The Astronomical Journal, 163 (6)
We present multiepoch observations of the RY Tau jet for H alpha and [Fe ii] 1.644 mu m emission lines obtained with the Subaru Coronagraphic Extreme-AO and Visible Aperture Masking Polarimetric Imager for Resolved Exoplanetary Structures (VAMPIRES),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7aff97fd150040264242008755fbeb3d
https://resolver.caltech.edu/CaltechAUTHORS:20220517-214234864
https://resolver.caltech.edu/CaltechAUTHORS:20220517-214234864
Autor:
Wei-Hao Wang, Sebastien Foucaud, Bau-Ching Hsieh, Hung-Yu Jian, Lihwai Lin, Yen-Ting Lin, Jean Coupon, Yasuhiro Hashimoto, Masami Ouchi, Kazuhiro Shimasaku, Youichi Ohyama, Keiichi Umetsu, Shiang-Yu Wang, Tzu-Ching Chang
The Subaru Hyper Suprime-Cam (HSC) Strategic Survey is the latest-generation multi-band optical imaging survey for galaxy evolution and structure formation. The "Ultra-Deep" component of the HSC survey provides $grizy$ broad-band images over $\sim3.4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5f36b1f1c298da01c8ef8030fd79c33
http://arxiv.org/abs/2205.11546
http://arxiv.org/abs/2205.11546
Autor:
Hideo Matsuhara, Matthew A. Malkan, Rieko Momose, Yousuke Utsumi, Youichi Ohyama, Seong Jin Kim, Yoshoki Toba, Nagisa Oi, Ting Chi Huang, Toshinobu Takagi, Tomotsugu Goto
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:5024-5042
We present a five-broad-band (grizy) photometric catalogue of Subaru/Hyper Suprime-Cam (HSC) optical imaging observations at around the North Ecliptic Pole (NEP) where the AKARI infrared (IR) satellite conducted a large survey (NEP-Wide survey). The
We address the nature and origin of Super Star Clusters (SSCs) discovered by Holtzman et al. (1992) within a radius of $\sim$$5\,\rm kpc$ from the center of NGC 1275, the giant elliptical galaxy at the center of the Perseus Cluster. We show that, in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13e969a5882b2ee6d8b5496669177356
http://arxiv.org/abs/2203.04185
http://arxiv.org/abs/2203.04185
We address the nature and origin of a spiral disk at the center of NGC 1275, the giant elliptical galaxy at the center of the Perseus cluster, that spans a radius of $\sim$$5\,\rm kpc$. By comparing stellar absorption lines measured in long-slit opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4654a5d332474dece176e28d71a42fc7
Publikováno v:
Nature Astronomy. 4:153-158
Globular clusters (GCs) are thought to be ancient relics from the early formative phase of galaxies, although their physical origin remains uncertain1,2. GCs are most numerous around massive elliptical galaxies, where they can exhibit a broad colour