Zobrazeno 1 - 10
of 445
pro vyhledávání: '"HIRATA, Naoyuki"'
Autor:
Noma, Mitsuha, Hirata, Naoyuki
Publikováno v:
Icarus, Volume 414, 15 May 2024, 116031
The surface conditions of terrestrial bodies strongly reflect their geological evolutionary processes and vary among various terrestrial bodies. This diversity is attributed to variations in the timescales of boulder formation through processes such
Externí odkaz:
http://arxiv.org/abs/2406.02892
Autor:
Ikeya, Ren, Hirata, Naoyuki
To date, rings are found around a Centaur (10199) Chariklo, trans-neptunian objects (TNOs) (136108) Haumea, and (50000) Quaoar. These discoveries suggest that asteroidal ring systems may be common, particularly in the outer solar system. Since collis
Externí odkaz:
http://arxiv.org/abs/2406.01024
Autor:
Hirata, Naoyuki
The origin and early evolution of the Jovian moon Ganymede, known to have an internal ocean, have garnered considerable interest in the field of origin of satellites and life. Ganymede has an ancient impact structure, called a furrow system. The furr
Externí odkaz:
http://arxiv.org/abs/2403.03371
Autor:
Hirata, Naoyuki
Publikováno v:
Journal of Geophysical Research Planets, Volume 128,Issue 3, March 2023, e2022JE007473
Asteroid 4 Vesta has a set of parallel troughs aligned with its equator. Although previous evaluations suggest that it is of shock fracturing tectonic origin, we propose that the equatorial troughs can be created by secondary cratering from the large
Externí odkaz:
http://arxiv.org/abs/2303.14955
Publikováno v:
Geophysical Research Letters 2014, Volume 41, Issue 12, 4135-4141
The geologically active south pole of Enceladus generates a plume of micron-sized particles, which likely form Saturn's tenuous E-ring extending from the orbit of Mimas to Titan. Interactions between these particles and satellites have been suggested
Externí odkaz:
http://arxiv.org/abs/2205.11265
Autor:
Hirata, Naoyuki
Publikováno v:
JGR Planets, Volume121, Issue11, November 2016, Pages 2325-2334
The trailing hemisphere of Dione is characterized by the Wispy Terrain, where it exhibits a hemispheric-scale network of extensional tectonic faults superposed on the moon's cratered surface. The faults likely reflect past endogenic activity and Dion
Externí odkaz:
http://arxiv.org/abs/2205.07040
Autor:
Hirata, Naoyuki, Miyamoto, Hideaki
Publikováno v:
Icarus Volume 274, August 2016, Pages 116-121
From recently-acquired, high-resolution images obtained by the Cassini spacecraft, we examine the patterns and spatial distributions of rayed craters on Dione. We identify 29 rayed craters with diameters larger than 2km on Dione's surface. The densit
Externí odkaz:
http://arxiv.org/abs/2205.07036
Publikováno v:
Icarus Volume 378, 15 May 2022, 114920
Spokes in Saturn's rings are radially-extended structures consisting of dust grains. Although spacecraft and space telescope observations have revealed various detailed features of the spokes and their time variation, their formation mechanism is sti
Externí odkaz:
http://arxiv.org/abs/2205.07008
Autor:
Hirata, Naoyuki, Morota, Tomokatsu, Cho, Yuichiro, Kanamaru, Masanori, Watanabe, Sei-ichiro, Sugita, Seiji, Hirata, Naru, Yamamoto, Yukio, Noguchi, Rina, Shimaki, Yuri, Tatsumi, Eri, Yoshioka, Kazuo, Sawada, Hirotaka, Yokota, Yasuhiro, Sakatani, Naoya, Hayakawa, Masahiko, Matsuoka, Moe, Honda, Rie, Kameda, Shingo, Yamada, Mamabu, Kouyama, Toru, Suzuki, Hidehiko, Honda, Chikatoshi, Ogawa, Kazunori, Tsuda, Yuichi, Yoshikawa, Makoto, Saiki, Takanao, Tanaka, Satoshi, Terui, Fuyuto, Nakazawa, Satoru, Kikuchi, Shota, Yamaguchi, Tomohiro, Ogawa, Naoko, Ono, Go, Mimasu, Yuya, Yoshikawa, Kent, Takahashi, Tadateru, Takei, Yuto, Fujii, Atsushi, Takeuchi, Hiroshi, Okada, Tatsuaki, Shirai, Kei, Iijima, Yu-ichi
Publikováno v:
Icarus Volume 338, 1 March 2020, 113527
Asteroid 162173 Ryugu has numerous craters. The initial measurement of impact craters on Ryugu, by Sugita et al. (2019), is based on Hayabusa2 ONC images obtained during the first month after the arrival of Hayabusa2 in June 2018. Utilizing new image
Externí odkaz:
http://arxiv.org/abs/2205.05818
Autor:
Ikeya, Ren, Hirata, Naoyuki
Publikováno v:
Icarus Volume 367, October 2021, 114590
The Japanese spacecraft Hayabusa 2 visited the asteroid (162173) Ryugu and provided many high-resolution images of its surface, revealing that Ryugu has a spinning-top shape with a prominent equatorial ridge, much like the shapes reported for some ot
Externí odkaz:
http://arxiv.org/abs/2205.05816