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2012.4.9-4.15

4月9日(月)13:30~15:00   太陽系小天体セミナー   南棟2F 会議室
April 9 Mon Solar System Minor Body Seminar Conference Room, South Bldg. 2F

4月10日(火)15:00~16:00   EA-ARCセミナー   ALMA棟3F 307室
April 10 Tue   EA-ARC Seminar   ALMA Bldg. 307

4月10日(火)16:00~16:30   野辺山談話会   野辺山観測所 本館 輪講室
April 10 Tue   Nobeyama NAOJ Seminar   Seminar Room, Nobeyama

4月10日(火)16:30~17:00   野辺山談話会   野辺山観測所 本館 輪講室
April 10 Tue   Nobeyama NAOJ Seminar   Seminar Room, Nobeyama

4月13日(金)16:00~17:00   天文台談話会   すばる棟1F 大セミナー室
April 13 Fri   NAOJ Seminar   Large Seminar Room, Subaru Bldg.

詳細は以下をご覧下さい。

4月9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
4月9日(月)13:30~15:00
場所
南棟2階会議室
講演者
寺居剛
所属
国立天文台光赤外研究部
内容
観測計画
 ※最初に今年度のゼミのオリエンテーションを行います。
連絡先
 名前:渡部潤一
備考
テレビ会議またはスカイプによる参加も可
Campus
Mitaka
Seminar
Solar System Minor Body Seminar
Regular/Irregular
Regular
Date
April 9th 13:30~15:00
Place
the Conference Room of South Building (2F), NAOJ
Speaker
Tsuyoshi Terai
Affiliation
Optical and Infrared Astronomy Division, NAOJ
Contents
introduction of plans for observations
 ※There is orientation at the beginning of this seminar.
Facilitator
 Name:Jun-ichi Watanabe
Comment
・welcome to participate via TV conference system or Skype system

4月10日(火)

キャンパス
三鷹
セミナー名
EA-ARCセミナー
臨時・定例の別
定例
日時
4月10日(火)15:00~16:00
場所
ALMA棟 3階 307室
講演者
秋山永治 さん
所属
ALMA
タイトル
Thermal Structure of Protoplanetary Disk around Herbig Ae Stars Based on Millimeter and Sub-millimeter Observations
Abstract
It has become evident that the presence of extrasolar planetary system is ubiquitous in our galaxy as search for exo-planets progresses.
However, a number of fundamental problems regarding planet formation still remain and it is crutial to unvail the disk structure that is responsible for planet formation as detail as possible. Multi-CO line observations in 12CO(J=1-0), 13CO(J=1-0), C18O(J=1-0), 12CO(J=3-2), and 13CO(J=3-2), toward three protoplanetary disks around intermediate mass pre-main-sequence stars (Herbig Ae stars), HD 163296, HD 31648, and HD 169142, were conducted and double-peaked profiles, which are a decisive characteristic for disks in rotation were successfully detected. Taking advantage of different optical depth (absorption coefficient) for each CO line and applying disk model, we could derive the vertical temperature distribution in the disk about 100 AU away from the central star; 10 – 20 K in the interior and 30 – 40 K in the upper surface of the disk. This kind of picture is consistent with the passive disk characteristic predicted by the disk theory. Since this kind of thermal structure is seen in all of the disks, it is thought to be common for protoplanetary disks.

 (英語での発表となります)

連絡先
 氏名:西合一矢
キャンパス
野辺山
セミナー名
国立天文台野辺山 談話会
臨時・定例の別
定例
日時
4月10日(火)16:00~16:30
場所
野辺山観測所 本館 輪講室
講演者
高桑繁久 氏
所属
ASIAA
タイトル
A Keplerian Circumbinary Disk around the Protobinary System of L1551 NE
Abstract
We will present our recent results of high-resolution (~0.7 arcsec) SMA observations of L1551 NE, a Class I protobinary system located in Taurus. The 0.9-mm continuum image of L1551 NE shows a compact (~100 AU) emission component associated with the south-eastern protostellar companion, Source A, whereas the north-western companion, Source B, locates at the outskirt of the continuum component. In addition, “U-shaped” continuum components located at the northwest and southeast of Source A are seen, comprising a ~600-AU scale “circumbinary disk”. The 13CO (3-2) and C18O (3-2) line emission show a clear Keplerian rotating motion in the circumbinary disk centered on Source A, and does not show vrot ~r-1 rotation and infalling motion. The implications and the possible applications of the Keplerian circumbinary disk will be discussed.
連絡先
名前:柴崎清登、高橋茂、島尻芳人
備考
テレビ参加可
キャンパス
野辺山
セミナー名
国立天文台野辺山 談話会
臨時・定例の別
定例
日時
4月10日(火)16:30~17:00
場所
野辺山観測所 本館 輪講室
講演者
Yen Hsi-Wei 氏
所属
ASIAA
タイトル
Search for Transition from Protostellar Envelopes to Keplerian Disks
Abstract
Keplerian disks have been widely found around T Tauri stars, which are often called “protoplanetary disks”. It is, however, unclear how Keplerian disks are formed in the early stage of star formation. To study the formation and growth of Keplerian disks around protostars, we have been conducting SMA observations toward a sample of Class 0 and I protostars. We measured the rotational velocity of molecular gas around protostars as a function of the radius from 100 to 2000 AU. We found that on an ~1000 AU scale younger protostellar sources tend to exhibit slower rotational motion than more evolved sources, and there is a hint that the gas motion around protostars likely evolves from the rotation with a conserved angular momentum to Keplerian rotation. By combining our current results with the forthcoming Nobeyama 45 m observational results, we will be able to reveal the rotational profile at radii from 100 to 10000 AU. Such a complete rotational profile can show the transition from protostellar envelopes to Keplerian disks and how the angular momentum is transported from large to small scales.
連絡先
名前:柴崎清登、高橋茂、島尻芳人
備考
テレビ参加可

4月13日(金)

キャンパス
三鷹
セミナー名
国立天文台談話会
臨時・定例の別
定例
日時
4月13日(金曜日)16時~17時
場所
大セミナー室
講演者
Jeremy MOULD
所属
Swinburne University
タイトル
Mapping the Dark Matter with recent redshift surveys
Abstract
Fundamental plane distances from the 6dF Galaxy Redshift Survey are fitted to a model of the density field within 200/h Mpc.
Likelihood is maximized for a single value of the local galaxy density, as expected in linear theory for the relation between overdensity and peculiar velocity. The dipole of the inferred southern hemisphere early type galaxy peculiar velocities is calculated within 150/h Mpc, before and after correction for the individual galaxy velocities predicted by the model. The former agrees with that obtained by other peculiar velocity studies (e.g. SFI++*). The latter is only of order 150 km/sec and consistent with the expectations of the standard cosmological model and recent forecasts of the cosmic mach number, which show linearly declining bulk flow with increasing scale.
Prospects for extending this work include the WALLABY 21 cm survey and the TAIPAN optical redshift survey. The prospects for a 1% measurement of the Hubble Constant (and its impact, together with CMB measurements, on neutrino physics) will also be discussed.
* SFI++:
Masters et al. 2006, ApJ, 653, 861
Springob et al. 2007, ApJS, 172, 599 (Erratum ApJS, 182, 474, 2009)
連絡先
 名前:相馬 充
Campus
Mitaka
Seminar
NAOJ Seminar
Regular/Irregular
Regular
Date
2012 April 13
Place
Large Seminar Room
Speaker
Jeremy MOULD
Affiliation
Swinburne University
Title
Mapping the Dark Matter with recent redshift surveys
Facilitator
Name: Mitsuru SOMA

以上

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