Zobrazeno 1 - 10
of 235
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, Masanobu Kunitomo, Takuya Takarada, Masashi Omiya, Hiroki Harakawa, Guang-Yao Xiao, Yu-Juan Liu, Hideyuki Izumiura, Eiji Kambe, Michitoshi Yoshida, Yoichi Itoh, Hiroyasu Ando, Eiichiro Kokubo, 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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c22ba77cb360bddd0975baab6a83bbd
http://arxiv.org/abs/2211.06576
http://arxiv.org/abs/2211.06576
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
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
Autor:
Tamami Okamoto, Shigeru Ida
Observationally inferred crystalline abundance in silicates in comets, which should have been formed in the outer region of a protoplanetary disk, is relatively high (~ 10-60%), although crystalline silicates would be formed by annealing of amorphous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b56dc250544211e710ee03b65536ace
http://arxiv.org/abs/2201.05507
http://arxiv.org/abs/2201.05507
Forming planetesimals from pebbles is a major challenge in our current understanding of planet formation. In a protoplanetary disk, pebbles drift inward near the disk midplane via gas drag and they may enter a dead zone. In this context, we identifie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfe92c05a73db264d6f9b5839fbe5e55