Search Results 1-20 of 138

  • The dual origin of water in carbonaceous asteroids revealed by CM chondrites  [in Japanese]

    Yurimoto Hisayoshi , Piani Laurette

    低温科学 (78), 259-264, 2020-03-24

    IR  DOI 

  • Evolution of chemical structure of a protoplanetary disk  [in Japanese]

    Nagahara Hiroko

    低温科学 (78), 115-125, 2020-03-24

    IR  DOI 

  • Orbital evolution of a circumbinary planet in a gaseous disk

    Yamanaka Akihiro , Sasaki Takanori

    … We propose a scenario in which a planet formed beyond the snow line and migrated to the inner edge of the circumbinary disk, which was within the unstable area, and then moved to the current orbit through outward transportation. … We carried out N-body simulations with a dissipating circumbinary protoplanetary disk for binary systems with different eccentricities and mass ratios. …

    Earth, Planets and Space (71), 2019-07-30

    IR 

  • A Tail Structure Associated with a Protoplanetary Disk around SU Aurigae

    Akiyama Eiji , Vorobyov Eduard I. , Liu Hauyu Baobabu , Dong Ruobing , de Leon Jerome , Liu Sheng-Yuan , Tamura Motohide

    The Astronomical journal 157(4), 165, 2019-04-04

    IR 

  • The gas-to-dust ratio in the protoplanetary disk of HD 142527  [in Japanese]

    Soon K.-L. , Momose M. , Muto T. , Tsukagoshi T. , Kataoka A. , Hanawa T. , Fukagawa M. , Saigo K. , Shibai H.

    <p> 多くの原始惑星系円盤のガスとダストが異なる空間分布を持つことがアルマ望遠鏡によって明らかにされた.本研究は,一つのケーススタディとして若い星HD 142527に付随する原始惑星系円盤のガスとダストの質量比,ガス・ダスト比の空間分布を明らかにする.本稿の最初ではまず,若い星HD 142527に付随する原始惑星系円盤のアルマ望遠鏡の観測結果を紹介する.対象は98.5 GHzと336 …

    Planetary People - The Japanese Society for Planetary Sciences 28(4), 295-304, 2019

    J-STAGE 

  • Vigorous interactions of protoplanetary disk around SU Aurigae  [in Japanese]

    Akiyama E.

    <p> これまでぎょしゃ座SU星の描像が不明であったが,今回のアルマ望遠鏡による観測で原始惑星系円盤に長さ1000 au以上の尾構造が付随することが確認された.幾何学的な構造に加え速度構造を調べた結果,円盤と尾構造は物理的に接続し一つの系を形成していることが判明した.さらに,原始惑星系円盤と尾構造で構成される系の起源について数値流体シミュレーションで調査したところ,(1)他天体との衝突 …

    Planetary People - The Japanese Society for Planetary Sciences 28(4), 305-312, 2019

    J-STAGE 

  • Initial 26Al/27Al ratios of condensed CAIs in CV chondrites  [in Japanese]

    Kawasaki Noriyuki , Wada Sohei , Park Changkun , Sakamoto Naoya , Yurimoto Hisayoshi

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    Abstracts of Annual Meeting of the Geochemical Society of Japan 66(0), 170, 2019

    J-STAGE 

  • Oxygen isotope distributions of a hibonite-melilite-rich fine-grained CAI in the reduced CV chondrite NWA 8613  [in Japanese]

    Wada Sohei , Kawasaki Noriyuki , Yurimoto Hisayoshi

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    Abstracts of Annual Meeting of the Geochemical Society of Japan 66(0), 169, 2019

    J-STAGE 

  • Dust dissipation timescales of protoplanetary disks and debris disks

    前嶋 宏志 , 小島 拓也 , 中川 貴雄 , Kwon Jungmi , 瀧田 怜 , Maeshima Hiroshi , Kojima Takuya , Nakagawa Takao , Kwon Jungmi , Takita Satoshi

    … The far-infrared excess of stars with protoplanetary disks and debris disks is expected to provide us with key information on dust dissipation process in the outer disks. … We carried out two type of studies: one is the study on protoplanetary disks based on observations of T Tauri stars, and the other is the study on debris disks based on observations of A-type main sequence stars. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (JAXA-SP-17-009E), 313-316, 2018-03-09

    IR 

  • Debris Disks and the Zodiacal Light: from AKARI to SPICA

    石原 大助 , 金田 英宏 , 深川 美里 , 高羽 幸 , 小林 浩 , 藤原 英明 , 大坪 貴文 , Pyo Jeonghyun , 樋口 あや , 尾中 敬 , Ishihara Daisuke , Kaneda Hidehiro , Fukagawa Misato , Takaba Sachi , Kobayashi Hiroshi , Fujiwara Hideaki , Otsubo Takafumi , Pyo Jeonghyun , Higuchi Aya , Onaka Takashi

    … The debris-disk sample explored by AKARI includes 24 objects whose AKARI (2006-2007) and WISE (2009-2010) fluxes cannot be explained by the same blackbody radiation and suggests temporal variation in 2-4 years. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (JAXA-SP-17-009E), 97-100, 2018-03-09

    IR 

  • Multi-wavelength observations of planet forming disks: Constraints on planet formation processes

    Kamp Inga , Antonellini Stefano , Carmona Andres , Ilee John , Rab Christian

    … Our understanding of protoplanetary disks has greatly improved over the last decade due to a wealth of data from new facilities. … In the ALMA era, this can be confronted for the first time also with evolutionary timescales of mm grains in the outer disk. … Gas surveys in the context of the existing multi-wavelength dust surveys will be a key in large statistical studies of disk gas evolution. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (JAXA-SP-17-009E), 89-96, 2018-03-09

    IR 

  • First Census of Habitable Zone of Protoplanetary Disks in the Galactic Scale

    安井 千香子 , Yasui Chikako

    … Circumstellar disks have been thoroughly studied with MIR wavelengths because MIR traces the critical components of disks, such as life habitable zone of protoplanetary disks and debris disk. … As a result, many characteristics of the disk evolution have been revealed e.g., disk lifetime, dust growth, transitional disk. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (JAXA-SP-17-010E), 361-363, 2018-03-09

    IR 

  • Current Understanding of Young Circumstellar Disks: Observations of Gaseous Protoplanetary Disks

    深川 美里 , Fukagawa Misato

    … I provide a very brief overview on recent observations of protoplanetary disks, focusing on statistical studies about disk lifetime and mass, high-angular-resolution imaging in scattered light at near-infrared wavelengths and in thermal emission from dust grains in submillimeter. …

    宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (JAXA-SP-17-010E), 321-324, 2018-03-09

    IR 

  • Dust Coagulation Regulated by Turbulent Clustering in Protoplanetary Disks

    Ishihara Takashi , Kobayashi Naoki , Enohata Kei , Umemura Masayuki , Shiraishi Kenji , 梅村 雅之

    … Since the collision velocities of dust particles are regulated by turbulence in a protoplanetary disk, turbulent clustering should be properly treated. … Thus, turbulent clustering plays a significant role in the growth of centimeter-sized compact aggregates (pebbles) and also enhances the solid abundance, which may lead to the streaming instability in a disk. …

    The Astrophysical Journal 854(2), 81, 2018-02

    IR 

  • Silicate–SiO reaction in a protoplanetary disk recorded by oxygen isotopes in chondrules

    Tanaka Ryoji , Nakamura Eizo

    … The formation of planetesimals and planetary embryos during the earliest stages of the solar protoplanetary disk largely determined the composition and structure of the terrestrial planets. … Within a few million years of the birth of the Solar System, chondrule formation and the accretion of the parent bodies of differentiated achondrites and the terrestrial planets took place in the inner protoplanetary disk 1,2 . …

    Nature Astronomy (1), 0137, 2017-05-26

    IR 

  • Distribution of Captured Planetesimals in Circumplanetary Gas Disks and Implications for Accretion of Regular Satellites

    Suetsugu Ryo , Ohtsuki Keiji

    … Planetesimals that are moving on heliocentric orbits and are sufficiently large to be decoupled from the flow of the protoplanetary gas disk can be captured by gas drag from the circumplanetary disk. … planetesimals and the width of the gap in the protoplanetary disk. … examine the ratio of the surface densities of dust and captured planetesimals in the circumplanetary disk. …

    Astrophysical Journal 839(1), 66, 2017-04-10

    IR 

  • Planet Formation in Protoplanetary Disks and Disk Structures Revealed by ALMA  [in Japanese]

    金川 和弘

    天文月報 = The astronomical herald 110(4), 262-269, 2017-04

  • Chronological study of oxygen isotope composition for the solar protoplanetary disk recorded in a fluffy Type A CAI from Vigarano

    Kawasaki Noriyuki , Itoh Shoichi , Sakamoto Naoya , Yurimoto Hisayoshi

    Geochimica et cosmochimica acta (201), 83-102, 2017-03-15

    IR 

  • Development of high precision microanalysis for oxygen isotopes and studies for oxygen isotope anomaly in the early solar system  [in Japanese]

    Yurimoto Hisayoshi

    … The presence of oxygen in gaseous, ice and dust phases makes oxygen isotopes important tracers of various fractionation processes to form a protoplanetary accretion disk, which are essential for understanding the evolution of building blocks for planet formation. …

    Chikyukagaku 51(2), 49-59, 2017

    J-STAGE 

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