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2014.9.8-9.14

9月8日(月)13:30~15:00  太陽系小天体セミナー   南棟2階会議室
Sep 8 Mon   Solar System Minor Body Seminar   Conference Room, South Bldg.2F

9月10日(水)10:30~12:00  総研大コロキウム   中央棟(北)1F講義室
Sep 10 Wed   SOKENDAI colloquium         Lecture Room

詳細は以下をご覧下さい。

9月8日(月)

キャンパス
三鷹
セミナー名
太陽系小天体セミナー
臨時・定例の別
定例
日時
9月8日(月曜日)13時30分~15時
場所
南棟2階会議室
講演者
Wayne Orchiston
所属
National Astronomical Research Institute of Thailand
タイトル
The Meteorites of Japan as Viewed from an Historical Perspective
Abstract
In the last 40 years Japan has built a remarkable international record researching Antarctic meteorites, but what do we know about those meteorites found on Japanese soil? The Meteoritical Society’s database lists 66 Japanese meteorites, but some of these are suspect and the true number is about 55. Included among these are examples of relatively rare classes of meteorite, such as the Sayama CM chondrite, the Kuga and Tendo IIIA-B irons and the Zisho allasite, as well as unclassified stony meteorites (Kijima, Urasaki and Yoshiki) and unclassified iron meteorites (Fukue, Komagome, Sakauchi and Suwa). Some of these meteorites have been neglected, and their scientific investigation is long overdue.
The earliest known meteorite from anywhere in the world that was seen to fall, was recovered, and is preserved to this day is the Togata Meteorite from Kyushu, which dates from AD 861. Furthermore, it is a remarkable statistic that 34.5% of Japan’s confirmed meteorites were discovered in the nineteenth century or earlier, and many of these are historically and/or scientifically important. This relative over-abundance of early meteorites means that Japan can play a key role in contributing to the history of meteoritics, a new field that combines elements of astronomy, chemistry, geology and physics. The Journal of Astronomical History and Heritage is now publishing papers on the history of meteoritics and impact cratering, and we look forward to featuring papers on Japanese meteorites in future issues.
 名前:渡部潤一
備考
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9月10日(水)

Campus
Mitaka
Seminar
SOKENDAI colloquium
Regular/Irregular
Regular
Date
10:30-12:00, Sep 10, 2014
Place
Lecture Room
Speaker
Tomonari Michiyama
Abstract
TBD
Speaker
Cheulhong MIN
Affiliation
D2, SOKENDAI, Mitaka(supervisor: Mareki Honma)
Title
Multi-epoch VERA observations of the SiO masers toward R Aquarii
Speaker
Daehyun Oh
Affiliation
D2, SOKENDAI, Mitaka(supervisor: Aoki Wako)
Title
Wide-orbit companion candidates and Stellar Disk around T-Tauri Star
Abstract
Two substellar companion candidates with planetary mass, around a T-Tauri star in the ρ Ophiuchi star-forming region, are discovered by results of Subaru Telescope’s near-infrared imaging. Candidates are separated by 1400au and 500au. If these candidates were real companions, they are the widest-orbit and the lowest mass planetary-mass companions(PMCs) candidates. This discovery may suggest that PMCs form via extreme case of cloud core fragmentation for multiple stars. And also stellar disk are imaged by HiCIAO, hight contrast instrument for exoplanets and disks, with Subaru Telescope. This could be the first case, which imaged both of planetary mass companions and disk around same star. Even two companions candidates are not bounded around the star, they still could be one of the lowest mass objects. In this presentation, I will discuss about observations and confirmations of these objects, and the latest results about their properties.
Facilitator
-Name:Taiki Suzuki

以上

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