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2016.1.18-1.24

1月18日(月)13:30~15:00  太陽系小天体セミナー   中央棟(東)輪講室
Jan 18 Mon   Solar System Minor Body Seminar   Rinko-shitsu,Main Bldg.(East)

1月20日(水)10:30~12:00  総研大コロキウム   中央棟(北)1F講義室
Jan 20 Wed   SOKENDAI colloquium         Lecture Room

1月20日(水)14:10~15:10  理論コロキウム    コスモス会館会議室
Jan 20 Wed   DTA Colloquium           Conference Room, Cosmos Lodge

1月21日(木)15:00~16:00 先端技術セミナー    中央棟(東)輪講室
Jan 21 Thu    ATC Seminar        Rinko-shitsu,Main Bldg.(East)

1月22日(金)11:00~12:00  赤外ゼミ    すばる棟3F TV会議室
Jan 22 Fri   Infrared Seminar        TV Conference Room, Subaru bldg.3F

1月22日(金)13:30~15:00  太陽天体プラズマセミナー  中央棟(北)115(運用連絡室)
Jan 22 Fri   Solar and Space Plasma Seminar     Room 115 (Unyo-renraku-shitsu), Main Building (North)

1月22日(金)16:00~17:00  国立天文台談話会   大セミナー室
Jan 22 Fri   NAOJ Seminar          Large Seminar Room

詳細は以下をご覧下さい。

1月18日(月)

キャンパス
三鷹
セミナー名
太陽系小天体セミナー
定例・臨時の別
定例
日時
1月18日(月曜日)13時30分~15時
場所
輪講室
タイトル
ビジネス、2016年観測指針
講演者
春山純一
所属
JAXA ISAS
タイトル
月火星の縦孔・地下空洞とその探査
Abstract
月火星には、火成活動起源の地下空洞が存在すると考えられていたが、ここ数年の月火星探査から、そうした空洞の存在を示唆する天窓(縦孔)が発見されてきた。本講演では、SELENE(かぐや)が発見した月の縦孔について紹介し、月火星の縦孔の科学的重要性、将来の利用可能性についてを議論する。
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

1月20日(水)

Campus
Mitaka
Seminar
SOKENDAI Colloquium
Regularly Scheduled/Sporadic
Regularly Scheduled
Date and time
10:30 – 12:00, Jan 20, 2016
Place
Lecture Room
Speaker1
Kotomi Taniguchi
Affiliation
D1, SOKENDAI(supervisor: Masao Saito)
Title
Chemistry of Carbon-Chain Molecules in Star-Forming Regions
Abstract
The chemical evolution of carbon-chain molecules has been studied mainly toward low-mass star forming regions. We have been survey observations of HC3N and HC5N toward 14 high-mass starless cores (HMSCs) and 27 high-mass protostellar objects (HMPOs) with the Nobeyama 45-m telescope. One third observations have been completed until now, and the remaining observations will be allocated in May this year. We carried out observations toward 4HMSCs and 10 HMPOs. We integrated approximately 40 minutes on-source per source, and the rms noise levels are below 15 mK. We detected HC3N toward all sources and HC5N toward 2 HMSCs and 2 HMPOs with the signal-to-noise ratios above 5. I’ll talk about the preliminary results, ongoing projects with the 45-m telescope, and scheduled observations with other telescopes in this colloquium.
Speaker2
Taiki Suzuki
Affiliation
D2, SOKENDAI
Title
TBA
Facilitator
-Name:Ryosuke Nagasawa
Comment
TV conference connection is available from Hawaii, Nobeyama, Mizusawa and Okayama.

1月20日(水)

Campus
Mitaka
Seminar
DTA colloquium
Regularly Scheduled/Sporadic
Regularly Scheduled
Date and time
20 Jan 2016, 14:10-15:10
Place
Conference Room, Cosmos Lodge
Speaker
Ronin Wu
Affiliation
Univ. of Tokyo
Title
Spatially resolved physical conditions of molecular gas: a zoom-in from circumnuclear region of M83 to Carina nebula
Abstract
Since the launch of the Herschel Space Observatory (Pilbratt et al. 2010), our understanding about the photodissociation regions (PDR) has taken a step forward. In the bandwidth of the Fourier Transform Spectrometer (FTS) of the Spectral and Photometric Imaging REceiver (SPIRE) on board Herschel, ten CO rotational transitions, including J = 4-3 to J = 13-12, and three fine structure lines, including [CI] 609, [CI] 370, and [NII] 250 m, are covered. This presentation focuses on the physical conditions of molecular gas probed by the Herschel SPIRE/FTS.
Based on the spatially resolved physical parameters derived from the CO spectral line energy distribution (SLED) map and the comparisons with the dust properties and starformation tracers, I will first present our findings at the circumnuclear region of M83 (Wu et al. 2015), and then zoom in toward the molecular cloud near a young open cluster, Trumpler 14, in Carina nebula. I will discuss (1) the potential of using [NII] 250 and [CI] 370 micron as star formation tracers; (2) the reliability of tracing molecular gas with CO (3) the excitation mechanisms of warm CO (4) the possibility of studying stellar feedback by tracing the thermal pressure of intersetllar molecular gas.
Facilitator
-Name: Tsuyoshi Inoue
Comment
English

1月21日(木)

キャンパス
三鷹
セミナー名
ATCセミナー(ATC seminar)
定例・臨時の別
臨時
日時
1月21日(木曜日)15時~16時
場所
輪講室
講演者
成影典之
所属
先端技術センター
タイトル
打ち上げ成功!太陽ライマンα線偏光分光観測ロケット実験 CLASP の概要
Overview of the CLASP sounding rocket project
Abstract
2015年9月3日、太陽ライマンα線偏光分光観測ロケット実験CLASPは打ち上げられ、世界で初めて太陽ライマンα線 (121.567 nm) の直線偏光を 0.1% の精度で測定することに成功しました。この貴重なデータは、太陽の彩層と呼ばれる大気層の磁場構造やそこでのエネルギー解放について、新たな知見を与えてくれると期待されます。
CLASPの観測装置は、国立天文台で約7年をかけて開発しました。本講演では、CLASPの概要(科学目的、光学デザイン、装置開発、組立と試験、打ち上げ、観測、データ解析の速報など)を紹介します。

The sounding rocket Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) was launched on September 3rd, 2015, and successfully detected the linear polarization signals (Stokes Q and U) with a polarization accuracy of 0.1 % in the solar hydrogen Lyman-alpha line (121.567 nm) for the first time. This unique data set may provide novel information about the magnetic structure and energetics in the upper solar chromosphere.
This CLASP instrument (telescope, spectropolarimeter, and slit-jaw monitoring system) was developed at NAOJ. In this talk, I introduce the overview of the CLASP (namely, science goal, optical design, development, integration and test, launch, observation, preliminary results of data analysis, etc.).

連絡先
-名前: 松尾 宏
備考
日本語での講演(presentation in Japanese)

1月22日(金)

キャンパス
三鷹
セミナー名
赤外ゼミ
定例・臨時の別
定例
日時
 1月 22日(金曜日) 11時 ~ 12時
場所
すばる棟3階TV会議室(IP: 133.40.2.249)
講演者
川内 紀代恵
所属
東京工業大学
タイトル
論文紹介:Rotation and winds of exoplanet HD 189733 b measured with high-dispersion transmission spectroscopy (Brogi et al. 2015)
連絡先
-名前:楊 毅

1月22日(金)

Campus
Mitaka
Seminar
Solar and Space Plasma Seminar
Regularly Scheduled/Sporadic
Regular
Date and time
22 January (Fri), 13:30-15:00
Place
Room 115 (Unyo-renraku-shitsu), Main Building (North)
Speaker
Gabriel Giono
Affiliation
SOKENDAI/NAOJ
Title
Novel Instrumentation to Reach the 0.1% Polarization Accuracy for the Chromospheric Lyman-Alpha Spectro-Polarimeter
Abstract
The Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) is a sounding rocket experiment designed to measure the linear polarization of the hydrogen Lyman-alpha line (121.6nm). The line is emitted in the upper-chromosphere and transition region, and the Hanle effect is expected to operate in the core of this spectral line for magnetic field between 10 to 250 Gauss. Detecting its polarization signature requires an instrumentation with an unprecedented polarization sensitivity of 0.1% in the vacuum ultraviolet (VUV) range. A dedicated design of the instrument and its experimental verification was crucial to ensure the scientific success of the mission, but also presented a lot of technical difficulties associated with the VUV: tests and calibrations under vacuum condition, monitoring of molecular contamination by outgasing, etc. For these reasons, the development of CLASP was unique and very challenging.

To ensure the optical and polarimetric performances of the instrument, novel experimental solutions were developed to conduct, I) the optical alignment of the UV-optimised classical two-mirror Cassegrain telescope,
II) the optical alignment of the inverse-Wadsworth mounting spectro-polarimeter, III) the telescope focus adjustment to the spectro-polarimeter’s slit and IV) the unprecedented polarization calibration of the spectro-polarimeter performed under vacuum at Lyman-Alpha. The methodology and the results from the previously cited experiments are described in this presentation, stressing the uniqueness of the techniques developed.

The pre-flight preparation of the instrument satisfied all the scientific requirements and the payload was successfully launched on September 3rd 2015. The preliminary results from the flight confirmed the scattering polarization in the Lyman-alpha line for the first time.
The disc center observation were analyzed to provide an in-flight calibration of the spurious polarization, revealing a spurious polarization level smaller than as expected from the pre-flight calibration. The origin of the discrepancy was pinpointed to the influence of the cross-talks from the incoming linear polarization to the measured intensity, underestimated during the pre-flight calibration. A new method was developed to estimate a complete response matrix including these additional cross-talk terms and was applied on the pre-flight polarization calibration measurements. The results indicated a spurious polarization level consistent with the in-flight calibration. The combined results of the pre-flight polarization calibration response matrix and the spurious polarization derived during the in-flight polarization calibration provided a complete response matrix of the instrument, which ensured its 0.1% polarization accuracy.
These results are also shown during this presentation.

Facilitator
-Name:Shin Toriumi

1月22日(金)

キャンパス
三鷹
セミナー名
国立天文台談話会
定例・臨時の別
定例
日時
1月22日 (金) 16:00-17:00
場所
大セミナー室
講演者
保坂 直紀
所属
東京大学海洋アライアンス
タイトル
科学の本を書くのは、苦しくて楽しい
Abstract
 科学に関する一般向けの本を書くのは、充実感があるし、きっと価値のあることだ。科学という人類の英知を、みんなで共有し、味わおうというのだから。他の動物にはない、人間だけが持つ楽しみのひとつだ。

 そんなわけで、「科学をわかりやすく紹介する」ことになる。そして、この文言は、いまや当たり前になりすぎて、なにも考えなくても自動的に口をついて出てきてしまうほどだ。だが、これは、じつはけっこう意味深な言葉だ。専門用語を使う使わないといった小手先の問題ではなく、ときには科学のコミュニティーから白眼視されても、孤独に耐えて自分の信念を貫くことができるかという、精神論をも含んでいるからだ。

 サイエンスライターがなにを考えて科学の本を書いているのか、その苦しみと楽しみをお話ししたいと思います。「それなら私も書こうではないか」と奮起する科学者が増えることを願いつつ・・・。

連絡先
名前:田中 雅臣

以上

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