Zobrazeno 1 - 10
of 1 682
pro vyhledávání: '"Ito, Kei"'
Autor:
Allen, Natalie, Oesch, Pascal A., Toft, Sune, Matharu, Jasleen, McPartland, Conor J. R., Weibel, Andrea, Brammer, Gabe, Bowler, Rebecca A. A., Ito, Kei, Gottumukkala, Rashmi, Rizzo, Francesca, Valentino, Francesco, Varadaraj, Rohan G., Weaver, John R., Whitaker, Katherine E.
The evolution of galaxy sizes in different wavelengths provides unique insights on galaxy build-up across cosmic epochs. Such measurements can now finally be done at $z>3$ thanks to the exquisite spatial resolution and multi-wavelength capability of
Externí odkaz:
http://arxiv.org/abs/2410.16354
Autor:
Sato, Riku A., Inoue, Akio K., Harikane, Yuichi, Shimakawa, Rhythm, Sugahara, Yuma, Tamura, Yoichi, Hashimoto, Takuya, Ito, Kei, Yamanaka, Satoshi, Mawatari, Ken, Fudamoto, Yoshinobu, Ren, Yi W.
We present the analysis of three intermediate-mass quiescent galaxies (QGs) with stellar masses of $\sim10^{10}M_{\rm \odot}$ at redshifts $z\sim 3 - 4$ using NIRSpec low-resolution spectroscopy. Utilising the SED fitting code BAGPIPES, we confirm th
Externí odkaz:
http://arxiv.org/abs/2410.08745
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:
Ito, Kei, Tanaka, Takumi S., Shimasaku, Kazuhiro, Ando, Makoto, Onoue, Masafusa, Tanaka, Masayuki, Matsui, Suin, Kakimoto, Takumi, Valentino, Francesco
We report a characterization of an X-ray-detected quiescent galaxy at $z=2.09$, named COS-XQG1, using JWST/NIRCam and NIRSpec data. This galaxy is detected in Chandra imaging, suggesting the presence of an AGN with a high black hole accretion rate of
Externí odkaz:
http://arxiv.org/abs/2408.08492
Autor:
Liang, Yongming, Ouchi, Masami, Sun, Dongsheng, Kashikawa, Nobunari, Cai, Zheng, Cantalupo, Sebastiano, Nagamine, Kentaro, Yajima, Hidenobu, Kirihara, Takanobu, Zhang, Haibin, Li, Mingyu, Shimakawa, Rhythm, Fan, Xiaohui, Ito, Kei, Tanaka, Masayuki, Harikane, Yuichi, Prochaska, J. Xavier, Travascio, Andrea, Wang, Weichen, Elvis, Martin, Fabbiano, Giuseppina, Arita, Junya, Onoue, Masafusa, Silverman, John D., Shi, Dongdong, An, FangXia, Izumi, Takuma, Shimasaku, Kazuhiro, Uchiyama, Hisakazu, Zhu, Chenghao
We report the identification of a quasar overdensity in the BOSSJ0210 field, dubbed Cosmic Himalayas, consisting of 11 quasars at $z=2.16-2.20$, the densest overdensity of quasars ($17\sigma$) in the $\sim$10,000 deg$^2$ of the Sloan Digital Sky Surv
Externí odkaz:
http://arxiv.org/abs/2404.15963
Autor:
Toshikawa, Jun, Wuyts, Stijn, Kashikawa, Nobunari, Uchiyama, Hisakazu, Bremer, Malcolm, Sawicki, Marcin, Ono, Yoshiaki, Kubo, Mariko, Ito, Kei
We present follow-up spectroscopy on a protocluster candidate selected from the wide-field imaging of the Hyper SuprimeCam Subaru Strategic Programme. The target protocluster candidate was identified as a $4.5\sigma$ overdense region of $g$-dropout g
Externí odkaz:
http://arxiv.org/abs/2404.15910
Publikováno v:
MNRAS, Volume 529, Issue 2, April 2024, Pages 926-940
With an X-ray stacking analysis of ~ 12, 000 Lyman-break galaxies (LBGs) using the Chandra Legacy Survey image, we investigate average supermassive black hole (SMBH) accretion properties of star-forming galaxies (SFGs) at 4 <~ z <~ 7. Although no X-r
Externí odkaz:
http://arxiv.org/abs/2312.13651
Autor:
Tanaka, Masayuki, Onodera, Masato, Shimakawa, Rhythm, Ito, Kei, Kakimoto, Takumi, Kubo, Mariko, Morishita, Takahiro, Toft, Sune, Valentino, Francesco, Wu, Po-Feng
We report on discovery of a concentration of massive quiescent galaxies located at z=4. The concentration is first identified using high-quality photometric redshifts based on deep, mutli-band data in Subaru/XMM-Newton Deep Field. Follow-up near-infr
Externí odkaz:
http://arxiv.org/abs/2311.11569
Autor:
Wright, Lillian, Whitaker, Katherine E., Weaver, John R., Cutler, Sam E., Wang, Bingjie, Carnall, Adam, Suess, Katherine A., Bezanson, Rachel, Nelson, Erica, Miller, Tim B., Ito, Kei, Valentino, Francesco
In this letter, we measure the rest-frame optical and near-infrared sizes of ten quiescent candidates at $3
Externí odkaz:
http://arxiv.org/abs/2311.05394
Autor:
Toshikawa, Jun, Wuyts, Stijn, Kashikawa, Nobunari, Liu, Chengze, Sawicki, Marcin, Overzier, Roderik, Kubo, Mariko, Uchiyama, Hisakazu, Ito, Kei, Bremer, Malcolm, Ono, Yoshiaki, Kodama, Tadayuki, Lin, Yen-Ting, Saito, Tomoki
We present a protocluster search covering $z\sim3$ to $z\sim5$ based on the combination of the Hyper SuprimeCam Subaru Strategic Programme and the CFHT Large Area $U$-band Deep Survey. We identify about 30 protocluster candidates per unit redshift ov
Externí odkaz:
http://arxiv.org/abs/2310.08525