Zobrazeno 1 - 10
of 1 200
pro vyhledávání: '"WADA, Koji"'
By performing $N$-body simulations, we investigated fundamental processes of collisions between dust aggregates composed of submicron-sized icy dust monomers. We examined the mass distribution of fragments in the collisional outcomes in a wide range
Externí odkaz:
http://arxiv.org/abs/2212.10796
Autor:
Kimura, Hiroshi, Ohtsuka, Katsuhito, Kikuchi, Shota, Ohtsuki, Keiji, Arai, Tomoko, Yoshida, Fumi, Hirata, Naoyuki, Senshu, Hiroki, Wada, Koji, Hirai, Takayuki, Hong, Peng K., Kobayashi, Masanori, Ishibashi, Ko, Yamada, Manabu, Okamoto, Takaya
The asteroid (3200) Phaethon is known to be the parent body of the Geminids, although meteor showers are commonly associated with the activity of periodic comets. What is most peculiar to the asteroid is its comet-like activity in the ejection of mic
Externí odkaz:
http://arxiv.org/abs/2204.09385
Autor:
Kimura, Hiroshi, Markkanen, Johannes, Kolokolova, Ludmilla, Hilchenbach, Martin, Wada, Koji, Kanada, Yasumasa, Matsui, Takafumi
A well-established constraint on the size of non-porous olivine grains or the porosity of aggregates consisting of small olivine grains from prominent narrow peaks in thermal infrared spectra characteristic of crystalline silicates is reexamined. To
Externí odkaz:
http://arxiv.org/abs/2203.04529
Autor:
Kikuchi, Shota, Shirai, Kei, Ishibashi, Ko, Wada, Koji, Yokota, Yasuhiro, Honda, Rie, Kadono, Toshihiko, Shimaki, Yuri, Sakatani, Naoya, Ogawa, Kazunori, Sawada, Hirotaka, Saiki, Takanao, Mimasu, Yuya, Takei, Yuto, Sugita, Seiji, Kouyama, Toru, Hirata, Naru, Nakazawa, Satoru, Yoshikawa, Makoto, Tanaka, Satoshi, Watanabe, Sei-ichiro, Tsuda, Yuichi, Arakawa, Masahiko
Publikováno v:
In Advances in Space Research 15 July 2024 74(2):899-936
We investigated fundamental processes of collisional sticking and fragmentation of dust aggregates by carrying out N-body simulations of submicron-sized icy dust monomers. We examined the condition for collisional growth of two colliding dust aggrega
Externí odkaz:
http://arxiv.org/abs/2104.06711
We study the packing fraction of clusters in free-falling streams of spherical and irregularly shaped particles using flash X-ray radiography. The estimated packing fraction of clusters is low enough to correspond to coordination numbers less than 6.
Externí odkaz:
http://arxiv.org/abs/2103.04017
Autor:
Kimura, Hiroshi, Wada, Koji, Kobayashi, Hiroshi, Senshu, Hiroki, Hirai, Takayuki, Yoshida, Fumi, Kobayashi, Masanori, Hong, Peng K., Arai, Tomoko, Ishibashi, Ko, Yamada, Manabu
Beyond the snow line of protoplanetary discs and inside the dense core of molecular clouds, the temperature of gas is low enough for water vapour to condense into amorphous ices on the surface of preexisting refractory dust particles. Recent numerica
Externí odkaz:
http://arxiv.org/abs/2008.05841
Autor:
Kimura, Hiroshi, Wada, Koji, Yoshida, Fumi, Hong, Peng K., Senshu, Hiroki, Arai, Tomoko, Hirai, Takayuki, Kobayashi, Masanori, Ishibashi, Ko, Yamada, Manabu
Publikováno v:
MNRAS 496, 1667-1682 (2020)
A consensus view on the formation of planetesimals is now exposed to a threat, since recent numerical studies on the mechanical properties of dust aggregates tend to dispute the conceptual picture that submicrometer-sized grains conglomerate into pla
Externí odkaz:
http://arxiv.org/abs/2006.05107
Autor:
VERA collaboration, Hirota, Tomoya, Nagayama, Takumi, Honma, Mareki, Adachi, Yuuki, Burns, Ross A., Chibueze, James O., Choi, Yoon Kyung, Hachisuka, Kazuya, Hada, Kazuhiro, Hagiwara, Yoshiaki, Hamada, Shota, Handa, Toshihiro, Hashimoto, Mao, Hirano, Ken, Hirata, Yushi, Ichikawa, Takanori, Imai, Hiroshi, Inenaga, Daichi, Ishikawa, Toshio, Jike, Takaaki, Kameya, Osamu, Kaseda, Daichi, Kim, Jeong Sook, Kim, Jungha, Kim, Mi Kyoung, Kobayashi, Hideyuki, Kono, Yusuke, Kurayama, Tomoharu, Matsuno, Masako, Morita, Atsushi, Motogi, Kazuhito, Murase, Takeru, Nakagawa, Akiharu, Nakanishi, Hiroyuki, Niinuma, Kotaro, Nishi, Junya, Oh, Chung Sik, Omodaka, Toshihiro, Oyadomari, Miyako, Oyama, Tomoaki, Sakai, Daisuke, Sakai, Nobuyuki, Sawada-Satoh, Satoko, Shibata, Katsunori M., Shizugami, Makoto, Sudo, Jumpei, Sugiyama, Koichiro, Sunada, Kazuyoshi, Suzuki, Syunsaku, Takahashi, Ken, Tamura, Yoshiaki, Tazaki, Fumie, Ueno, Yuji, Uno, Yuri, Urago, Riku, Wada, Koji, Wu, Yuan Wei, Yamashita, Kazuyoshi, Yamashita, Yuto, Yamauchi, Aya, Yuda, Akito
We present the first astrometry catalog from the Japanese VLBI (very long baseline interferometer) project VERA (VLBI Exploration of Radio Astrometry). We have compiled all the astrometry results from VERA, providing accurate trigonometric annual par
Externí odkaz:
http://arxiv.org/abs/2002.03089