投稿者「guas-writer」のアーカイブ

総合研究大学院大学 天文科学専攻 特別公開 2012

今年も例年通り、総合研究大学院大学/天文科学専攻の特別公開が、国立天文台の特別公開に合わせ2012/10/26~27の期間、共同で開催されました。天文科学専攻に所属する約30名の学生は、それぞれの所属部署と総研大の両方で準備を進めながら、当日は”総研大生の研究ライフ2012″と言う企画運営に携わりました。当日はお子さんから10~20代の若者、お子さんの親御さん世代の30~40代、更にはお孫さんがいらっしゃる50~60代の方々と幅広い年齢層の方々が来場されました。企画中にアンケートを取った結果(アンケート集計人数は263人)、”大学院での生活がどのようなものなのか、日常・非日常で分けていて、とてもイメージがつきやすかったです。非日常で、色んな観測所で観測をしているのが印象に残りました“と言うコメントを頂き、学生らしさが出た企画が好評を博していました。また、”(総研大の)存在を初めて知ったので、何もかもが印象的でした“と言うコメントなども頂き、総研大と言う存在を初めて知った方も多くいらっしゃったようです。総研大のPRを兼ねている特別公開なので、企画が持っている目標が十二分に達成されたと言えそうです。一方で、所属部署と総研大企画のシフト調整が直前まで行われていなかったり、折角上手に出来ている動画の配置場所が悪かったりと、反省点も挙げられています。来年の企画立案の際にはこれらの反省を活かし、更に良いものにして貰えればと思います。

毎年好評の総研大企画の景品や会場の様子!
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クイズの景品は毎年豪華!
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学生の日常を紹介中!
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クイズに正解すると、景品が貰えます!

文責: 総合研究大学院大学 天文科学専攻 博士過程4年 坂井 伸行

Absolute Proper Motion of CB 3 Away from the Galactic Plane Measured with VERA in a Galactic Superbubble / Powerful high-contrast imaging techniques on direct detection of exoplnaets

[Speaker 1]
Nobuyuki Sakai
[Title]
Absolute Proper Motion of CB 3 Away from the Galactic Plane Measured with VERA in a Galactic Superbubble
[Abstract]
TBA
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[Speaker 2]
Daehyun Oh
[Title]
Powerful high-contrast imaging techniques on direct detection of exoplnaets
[Abstract]
Direct detections of very faint exoplanets and brown dwarfs near bright stars are essential in understanding substellar for- mation and evolution around stars. The task is dauntingly difficult. The exoplanet or brown dwarf image is usually much fainter than the background from the brilliant PSF image. Aside from the Poisson noise, ground-based tele- scopes suffer from atmospheric turbulence that produces random short-lived speckles that mask faint companions. I will talk about two techniques called ADI and LOCI, can be used on ground-based altitude/ azimuth telescopes to subtract a significant fraction of the stellar quasistatic noise.

Near-infrared Imaging Polarimetric Study of Orion A molecular cloud / Revealing the lower side of IMF and Searching for planetary mass objects

[Speaker 1]
Amnart Sukom
[Title]
Near-infrared Imaging Polarimetric Study of Orion A molecular cloud
[Abstract]
Orion Molecular Cloud (OMC) is the nearest region of massive star formation, which was intensively studied as a representative of star-forming regions. The northern part of Orion A molecular cloud,
OMC-1, -2, -3, and the southern part, OMC-4, are often referred to Integral Shape Filament (ISF), and contain intermediate-sized molecular cores, low and high mass young stars, dozens of Herbig-Haro (HH) objects and molecular outflows.
We present the first wide-field deep near-infrared images of 15′ x 50′ area of the Orion A ISF, obtained by SIRPOL, simultaneous JHKs imaging polarimeter on the IRSF telescope. Point-source aperture polarimetry suggest the magnetic field orientations are perpendicular to the elongation of the filament. Moreover, the hour-glassed shape magnetic field pattern in OMC-1 is confirmed by our polarization maps.
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[Speaker 2]
Takuya Suenaga
[Title]
Revealing the lower side of IMF and Searching for planetary mass objects
[Abstract]
Initial mass function (IMF) is one of the most important physical parameters in the star formation theory. Many author have investigated the IMF for a long time, however it has not been completely understood. I’m studying the lower side of IMF, in particular the bottom. Here, I’ll introduce some studies related to IMF, and my ongoing works.

Static compression process of dust aggregates in protoplanetary disks

[Speaker 1]
Akimasa Kataoka
[Title]
Static compression process of dust aggregates in protoplanetary disks
[Abstract]
Planetesimal formation process in protoplanetary disks is a key issue in planet formation. Recently, internal density evolution of dust aggregates with collisional compression has been proposed to solve this problem (Okuzumi et al. 2012). However, other compression processes, which are caused by gas drag or self gravity, have not been considered. Such compression processes may differ from collisional compression processes, and thus it may greatly affect internal density evolution of dust aggregates. Therefore, we investigated static compression processes of porous aggregates by calculating N-body
simulation with considering direct interaction forces (Wada et al. 2007), and we determine the equation of state of porous aggregates.

Galactic-scale Outflow at z>4 revealed by Adaptive Optics / Spectroscopic Follow-up Observation of a High-redshift Protocluster Candidate

[Speaker 1]
Takatoshi Shibuya
[Title]
Galactic-scale Outflow at z>4 revealed by Adaptive Optics
[Abstract]
Characterization of the large-scale galactic outflow is very important to understand many astrophysical phenomena at high-z, such as the escape of LyA photons from the galaxy, the relation between the galaxy populations, and IGM metal-enrichment history. Although galactic outflows are ubiquitously found in star-forming galaxies at 2