Zobrazeno 1 - 10
of 215
pro vyhledávání: '"Shigeru Ida"'
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
This study finds that the Moon accreted from an initially liquid-rich silicate disk and that rocky and icy exoplanets whose radii are smaller than 1.6 Earth radii are ideal candidates for hosting large exomoons.
Externí odkaz:
https://doaj.org/article/a6920d2cc13143c2a83f5bb99368c7af
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 47 (2023)
Dust particles in protoplanetary disks experience various chemical reactions under different physicochemical conditions through their accretion and diffusion, which results in the radial chemical gradient of dust. We performed three-dimensional Monte
Externí odkaz:
https://doaj.org/article/b7febc6ae1c74c3688b477a9881b918f
Autor:
Teng, Huan-Yu, Sato, Bun'ei, Kunitomo, Masanobu, Takarada, Takuya, Omiya, Masashi, Harakawa, Hiroki, Xiao, Guang-Yao, Liu, Yu-Juan, Izumiura, Hideyuki, Kambe, Eiji, Yoshida, Michitoshi, Itoh, Yoichi, Ando, Hiroyasu, Kokubo, Eiichiro, Shigeru, Ida
We report the detection of a giant planet orbiting a G-type giant star HD 167768 from radial velocity measurements using HIgh Dispersion Echelle Spectrograph (HIDES) at Okayama Astrophysical Observatory (OAO). HD 167768 has a mass of $1.08_{-0.12}^{+
Externí odkaz:
http://arxiv.org/abs/2211.06576
A growing number of debris discs have been detected around metal-polluted white dwarfs. They are thought to be originated from tidally disrupted exoplanetary bodies and responsible for metal accretion onto host WDs. To explain (1) the observationally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::605ea968306fd20861647e7e80acee42
http://arxiv.org/abs/2211.16797
http://arxiv.org/abs/2211.16797
Autor:
Huan-Yu Teng, Bun’ei Sato, Takuya Takarada, Masashi Omiya, Hiroki Harakawa, Makiko Nagasawa, Ryo Hasegawa, Hideyuki Izumiura, Eiji Kambe, Michitoshi Yoshida, Yoichi Itoh, Hiroyasu Ando, Eiichiro Kokubo, Shigeru Ida
We report the discovery of a triple-giant-planet system around an evolved star HD 184010 (HR 7421, HIP 96016). This discovery is based on observations from Okayama Planet Search Program, a precise radial velocity survey, undertaken at Okayama Astroph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5774ec22712312f565c5a44c0ae27dc
http://arxiv.org/abs/2209.09426
http://arxiv.org/abs/2209.09426
Autor:
Shigeru Ida
Publikováno v:
Nature Astronomy. 6:1231-1232
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08f2ea12c37700df3ba838143474a13e
https://doi.org/10.1038/s41550-022-01822-9
https://doi.org/10.1038/s41550-022-01822-9
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:4658-4670
We investigate the impact of pre-main sequence stellar luminosity evolution on the thermal and chemical properties of disc mid-planes. We create template disc models exemplifying initial conditions for giant planet formation for a variety of stellar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bed7c3ebcaf2694f76289ab587fbfd91
https://doi.org/10.1093/mnras/staa3517
https://doi.org/10.1093/mnras/staa3517
A notable challenge of planet formation is to find a path to directly form planetesimals from small particles. Small particles are, in general, challenged to grow beyond meter size due to the “growth barrier” and the “drift barrier”. Over the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cf088100a0352ee894d9b4900cc1289
https://doi.org/10.5194/epsc2021-161
https://doi.org/10.5194/epsc2021-161
Autor:
Masahiro Ikoma, Jason Jackiewicz, Thierry Appourchaux, Jean-Pierre Rivet, Ivan Gonçalves, David G. Voelz, Patrick Gaulme, Patrick Boumier, F. X. Schmider, Bun'ei Sato, Shigeru Ida, Raul Morales-Juberias, Djamel Mékarnia, Tristan Guillot, Thomas A. Underwood
Publikováno v:
Icarus
Icarus, Elsevier, 2019, 319, pp.795-811. ⟨10.1016/j.icarus.2018.10.019⟩
Icarus, Elsevier, 2019, 319, pp.795-811. ⟨10.1016/j.icarus.2018.10.019⟩
We present the first measurements of Jupiter’s wind profile ever obtained with Doppler velocity measurements in the visible. Hitherto, knowledge about atmospheric dynamics has been obtained with cloud-tracking techniques, which consist of tracking
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e3ff5486a8c062ce6668ef305c9498b
https://doi.org/10.1016/j.icarus.2018.10.019
https://doi.org/10.1016/j.icarus.2018.10.019
We aim to understand the effect of stellar evolution on the evolution of protoplanetary disks. We focus in particular on the disk evolution around intermediate-mass (IM) stars, which evolve more rapidly than low-mass ones. We numerically solve the lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::935eb8b9f387d3b003753d555ee2d8b5
https://eprints.whiterose.ac.uk/172082/1/Kunitomo+21_published.pdf
https://eprints.whiterose.ac.uk/172082/1/Kunitomo+21_published.pdf