Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Michiko S. Fujii"'
Publikováno v:
The Open Journal of Astrophysics, Vol 7 (2024)
Gaia mission offers opportunities to search for compact binaries not involved in binary interactions (hereafter inert compact binaries), and results in the discoveries of binaries containing one black hole (BH) or one neutron star (NS), called "Gaia
Externí odkaz:
https://doaj.org/article/b33a3b5ad4db4dbea4f235870f259d3a
Autor:
Michiko S Fujii, Kohei Hattori, Long Wang, Yutaka Hirai, Jun Kumamoto, Yoshito Shimajiri, Takayuki R Saitoh
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 514:43-54
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2492c2b7cfeb6b7b205e76f5b44582dd
https://doi.org/10.1093/mnras/stac808
https://doi.org/10.1093/mnras/stac808
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 509:4713-4722
Observations found that star clusters contain a large fraction of binaries. Tight binaries are an important heating source that influences the long-term dynamical evolution of star clusters. However, due to the limitation of $N$-body tool, previous t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d1ea24ec87565a55c5993552f079522
https://doi.org/10.1093/mnras/stab3255
https://doi.org/10.1093/mnras/stab3255
Publikováno v:
Publications of the Astronomical Society of Japan. 73:1036-1056
Most stars are formed as star clusters in galaxies, which then disperse into galactic disks. Upcoming exascale supercomputational facilities will enable performing simulations of galaxies and their formation by resolving individual stars (star-by-sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::521b502ddb498d178e98b85d02c1c0d3
https://doi.org/10.1093/pasj/psab038
https://doi.org/10.1093/pasj/psab038
Autor:
Michiko S. Fujii, S.F. Portegies Zwart, Tetsuro Asano, Elena Sellentin, Jeroen Bédorf, Junichi Baba
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 499(2), 2416-2425
Gaia Data Release 2 revealed detailed structures of nearby stars in phase space. These include the Hercules stream, whose origin is still debated. Most of the previous numerical studies conjectured that the observed structures originate from orbits i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::674295dfe65fd135c4be54efb6637e08
https://doi.org/10.1093/mnras/staa2849
https://doi.org/10.1093/mnras/staa2849
Publikováno v:
Proceedings of the International Astronomical Union. 16:258-261
The Orion Nebula Cluster (ONC) is one of the nearest open clusters, which we can directly compare to numerical simulations. We performed a simulation of star cluster formation similar to the ONC using our new N-body/smoothed particle hydrodynamics co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e119286afa507091d59f97225cef470f
https://doi.org/10.1017/s1743921322001508
https://doi.org/10.1017/s1743921322001508
Autor:
Tetsuro Asano, Michiko S. Fujii, Junich Baba, Jeroen Bédorf, Elena Sellentin, Simon Portegies Zwart
Publikováno v:
Proceedings of the International Astronomical Union. 16:116-121
The velocity-space distribution of the solar neighborhood stars shows complex substructures (moving groups) including the well-known Hercules stream. Recently, the Gaia observation revealed their detailed structures, but their origins are still in de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1d79b09768e92086e0f38afbc22a5fb
https://doi.org/10.1017/s1743921322001521
https://doi.org/10.1017/s1743921322001521
Autor:
Tetsuro Asano, Michiko S Fujii, Junichi Baba, Jeroen Bédorf, Elena Sellentin, Simon Portegies Zwart
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 514(1), 460-469
The velocity-space distribution of the solar neighbourhood stars shows complex substructures. Most of the previous studies use static potentials to investigate their origins. Instead we use a self-consistent $N$-body model of the Milky Way, whose pot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5292201276af61aa8648c54acad45ac7
https://ui.adsabs.harvard.edu/abs/2022MNRAS.514..460A
https://ui.adsabs.harvard.edu/abs/2022MNRAS.514..460A
Publikováno v:
Proceedings of the International Astronomical Union. 14:204-207
Gravitational wave direct detections suggest that 30 M⊙ binary black holes (BBHs) commonly exist in the universe. One possible formation scenario of such BBHs is dynamical three-body encounters in dense star clusters. We performed a series of direc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d9542cf659b83ac75f5bcdec062a731
https://doi.org/10.1017/s1743921319007129
https://doi.org/10.1017/s1743921319007129
Publikováno v:
Proceedings of the International Astronomical Union. 14:220-223
We study runaway stellar collisions in primordial star clusters and formation of intermediate mass black holes (IMBHs). Using cosmological simulations, we identify eight atomic-cooling halos in which the star clusters form. We follow stellar and dark
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06f8f126db75ada566c345bb26c48551
https://doi.org/10.1017/s1743921319007245
https://doi.org/10.1017/s1743921319007245