Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Abe, Katsuya"'
Autor:
Broadhurst, Tom, Li, Sung Kei, Alfred, Amruth, Diego, Jose M., Morilla, Paloma, Kelly, Patrick L., Sun, Fengwu, Oguri, Masamune, Williams, Hayley, Windhorst, Rogier, Zitrin, Adi, Abe, Katsuya T., Chen, Wenlei, Fudamoto, Yoshinobu, Kawai, Hiroki, Lim, Jeremy, Liu, Tao, Meena, Ashish K., Palencia, Jose M., Smoot, George F., Williams, Liliya L. R.
Microlensed stars recently discovered by JWST & HST follow closely the winding critical curve of A370 along all sections of the ``Dragon Arc" traversed by the critical curve. These transients are fainter than $m_{AB}>26.5$, corresponding to the Asymp
Externí odkaz:
http://arxiv.org/abs/2405.19422
Autor:
Fudamoto, Yoshinobu, Sun, Fengwu, Diego, Jose M., Dai, Liang, Oguri, Masamune, Zitrin, Adi, Zackrisson, Erik, Jauzac, Mathilde, Lagattuta, David J., Egami, Eiichi, Iani, Edoardo, Windhorst, Rogier A., Abe, Katsuya T., Bauer, Franz Erik, Bian, Fuyan, Bhatawdekar, Rachana, Broadhurst, Thomas J., Cai, Zheng, Chen, Chian-Chou, Chen, Wenlei, Cohen, Seth H., Conselice, Christopher J., Espada, Daniel, Foo, Nicholas, Frye, Brenda L., Fujimoto, Seiji, Furtak, Lukas J., Golubchik, Miriam, Hsiao, Tiger Yu-Yang, Jolly, Jean-Baptiste, Kawai, Hiroki, Kelly, Patrick L., Koekemoer, Anton M., Kohno, Kotaro, Kokorev, Vasily, Li, Mingyu, Li, Zihao, Lin, Xiaojing, Magdis, Georgios E., Meena, Ashish K., Nabizadeh, Armin, Richard, Johan, Steinhardt, Charles L., Wu, Yunjing, Zhu, Yongda, Zou, Siwei
Strong gravitational magnification by massive galaxy clusters enable us to detect faint background sources, resolve their detailed internal structures, and in the most extreme cases identify and study individual stars in distant galaxies. Highly magn
Externí odkaz:
http://arxiv.org/abs/2404.08045
Autor:
Abe, Katsuya T., Tashiro, Hiroyuki
Publikováno v:
Phys. Rev. D 109, (2024) 103524
Some theoretical models for the early Universe predict a spike-type enhancement in the primordial power spectrum on a small scale, which would result in forming early-formed dark matter halos~(EFHs). Some recent studies have claimed to have placed li
Externí odkaz:
http://arxiv.org/abs/2401.00407
Publikováno v:
Phys. Rev. D 109, (2024) 083517
Astrometric perturbations of critical curves in strong lens systems are thought to be one of the most promising probes of substructures down to small-mass scales. While a smooth mass distribution creates a symmetric geometry of critical curves with r
Externí odkaz:
http://arxiv.org/abs/2311.18211
Autor:
Abe, Katsuya T., Tada, Yuichiro
Publikováno v:
Phys. Rev. D 108 (2023) no.10, L101304
The evidence of the nano-Hertz stochastic gravitational wave (GW) background is reported by multiple pulsar timing array collaborations. While a prominent candidate of the origin is astrophysical from supermassive black hole binaries, alternative mod
Externí odkaz:
http://arxiv.org/abs/2307.01653
Publikováno v:
JCAP05 (2023) 044
Primordial black holes (PBHs) whose masses are in $\sim[10^{-15}M_\odot,10^{-11}M_{\odot}]$ have been extensively studied as a candidate of whole dark matter (DM). One of the probes to test such a PBH-DM scenario is scalar-induced stochastic gravitat
Externí odkaz:
http://arxiv.org/abs/2209.13891
Autor:
Abe, Katsuya T.
Publikováno v:
Phys. Rev. D 106, 083521 (2022)
In this work, we investigate the effect of Population~III~(Pop.~III) stars in ultracompact minihalos~(UCMHs) on the cosmic ionization history using the Planck observation data. Although high-redshift astrophysics is not understood yet, UCMHs could ho
Externí odkaz:
http://arxiv.org/abs/2208.00375
Autor:
Abe, Katsuya T., Tashiro, Hiroyuki
Publikováno v:
Phys.Rev.D 106 (2022) 6, 063523
We study the diffuse background free-free emission induced by dark matter halos. Since dark matter halos host ionized thermal plasma, they could be an essential source of cosmological free-free emission. We evaluate the global background intensity an
Externí odkaz:
http://arxiv.org/abs/2206.11261
Baryonic gas falling onto a primordial black hole (PBH) emits photons via the free-free process. These photons can contribute the diffuse free-free background radiation in the frequency range of the cosmic microwave background radiation (CMB). We sho
Externí odkaz:
http://arxiv.org/abs/2108.01916
We provide a new constraint on the small-scale density fluctuations, evaluating the diffuse background free-free emission from dark matter halos in the dark ages. If there exists a large amplitude of the matter density fluctuations on small scales, t
Externí odkaz:
http://arxiv.org/abs/2108.00621