Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Kumamoto, Jun"'
Autor:
Fujii, Michiko S., Hattori, Kohei, Wang, Long, Hirai, Yutaka, Kumamoto, Jun, Shimajiri, Yoshito, Saitoh, Takayuki R.
Massive stars born in star clusters terminate star cluster formation by ionizing the surrounding gas. This process is considered to be prevalent in young star clusters containing massive stars. The Orion Nebula is an excellent example associated with
Externí odkaz:
http://arxiv.org/abs/2206.04296
Autor:
Fujii, Michiko S., Wang, Long, Hirai, Yutaka, Shimajiri, Yoshito, Kumamoto, Jun, Saitoh, Takayuki
The Orion Nebula Cluster (ONC) is an excellent example for understanding the formation of star clusters. Recent studies have shown that ONC has three distinct age populations and anisotropy in velocity dispersions, which are key characteristics for u
Externí odkaz:
http://arxiv.org/abs/2111.15154
Autor:
Arimoto, Makoto, Asada, Hideki, Cherry, Michael L., Fujii, Michiko S., Fukazawa, Yasushi, Harada, Akira, Hayama, Kazuhiro, Hosokawa, Takashi, Ioka, Kunihito, Itoh, Yoichi, Kanda, Nobuyuki, Kawabata, Koji S., Kawaguchi, Kyohei, Kawai, Nobuyuki, Kobayashi, Tsutomu, Kohri, Kazunori, Koshio, Yusuke, Kotake, Kei, Kumamoto, Jun, Machida, Masahiro N., Matsufuru, Hideo, Mihara, Tatehiro, Mori, Masaki, Morokuma, Tomoki, Mukohyama, Shinji, Nakano, Hiroyuki, Narikawa, Tatsuya, Negoro, Hitoshi, Nishizawa, Atsushi, Ohgami, Takayuki, Omukai, Kazuyuki, Sakamoto, Takanori, Sako, Shigeyuki, Sasada, Mahito, Sekiguchi, Yuichiro, Serino, Motoko, Soda, Jiro, Sugita, Satoshi, Sumiyoshi, Kohsuke, Susa, Hajime, Suyama, Teruaki, Takahashi, Hirotaka, Takahashi, Kazuya, Takiwaki, Tomoya, Tanaka, Takahiro, Tanaka, Masaomi, Tanikawa, Ataru, Tominaga, Nozomu, Uchikata, Nami, Utsumi, Yousuke, Vagins, Mark R., Yamada, Kei, Yoshida, Michitoshi
The detections of gravitational waves (GW) by LIGO/Virgo collaborations provide various possibilities to physics and astronomy. We are quite sure that GW observations will develop a lot both in precision and in number owing to the continuous works fo
Externí odkaz:
http://arxiv.org/abs/2104.02445
We performed direct N-body simulations of open clusters with four different metallicities. To investigate the effective spins of merging binary black holes (BBHs) originated from these open clusters, we calculated the spin evolution of Wolf-Rayet (WR
Externí odkaz:
http://arxiv.org/abs/2102.09323
Autor:
Trani, Alessandro Alberto, Tanikawa, Ataru, Fujii, Michiko S., Leigh, Nathan W. C., Kumamoto, Jun
Recent studies indicate that the progenitors of merging black hole (BH) binaries from young star clusters can undergo a common envelope phase just like isolated binaries. If the stars emerge from the common envelope as naked cores, tidal interactions
Externí odkaz:
http://arxiv.org/abs/2102.01689
Black hole-main sequence star (BH-MS) binaries are one of the targets of the future data releases of the astrometric satellite {\it Gaia}. They are supposed to be formed in two main sites: a galactic field and star clusters. However, previous work ha
Externí odkaz:
http://arxiv.org/abs/2001.11199
Several binary black holes (BBHs) have been observed using gravitational wave detectors. For the formation mechanism of BBHs, two main mechanisms, isolated binary evolution and dynamical formation in dense star clusters, have been suggested. Future o
Externí odkaz:
http://arxiv.org/abs/2001.10690
We estimate formation rates of LB-1-like systems through dynamical interactions in the framework of the theory of stellar evolution before the discovery of the LB-1 system. The LB-1 system contains $\sim 70M_\odot$ black hole (BH), so-called pair ins
Externí odkaz:
http://arxiv.org/abs/1912.04509
In order to investigate the formation rate of binary black holes (BBHs) in stellar clusters with a mass comparable to open clusters, we performed a series of direct $N$-body simulations of open clusters with a mass of $2.5\times10^3$ (Model A) and $1
Externí odkaz:
http://arxiv.org/abs/1811.06726
Autor:
Hattori, Kohei, Gouda, Naoteru, Yano, Taihei, Sakai, Nobuyuki, Tagawa, Hiromichi, Baba, Junichi, Kumamoto, Jun
The origin of the Hercules stream, the most prominent velocity substructure in the Solar neighbour disc stars, is still under debate. Recent accurate measurements of position, velocity, and metallicity provided by Tycho Gaia Astrometric Solution (TGA
Externí odkaz:
http://arxiv.org/abs/1804.01920