12月5日（月）13：30～15：00 太陽系小天体セミナー 南棟２階会議室
Dec 5 mon Solar System Minor Body Seminar Conference Room, South Bldg.2F
12月7日（水）10：30～12：00 総研大コロキウム 中央棟（北）1F講義室
Dec 7 wed SOKENDAI Colloquium Lecture room
12月8日（木）15：00～16：00 VLBIコロキウム 中央棟(南)2階VLBIセミナー室
Dec 8 thu VLBI Colloquium VLBI Seminar Room, Main Bldg. (South) 2F
12月9日（金）13：30～14：30 理論コロキウム コスモス会館会議室
Dec 9 fri DTA colloquium Conference Room, Cosmos Lodge
12月9日（金）16：00～17：00 国立天文台談話会 大セミナー室
Dec 9 fri NAOJ Seminar Large Seminar Room
詳細は以下をご覧下さい。
12月5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
- 12月5日（月曜日）13時30分～15時
- 場所
- 南棟２階会議室
- 講演者
- 新中善晴
- 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
12月7日（水）
- Campus
- Mitaka
- Seminar
- SOKENDAI colloquium
- Regularly Scheduled/Sporadic
- Regular
- Date and time
- 10:30-12:00, December 7, 2016
- Place
- Lecture room
- Speaker
- Speaker1 Yi Yang
- Affiliation
- SOKENDAI (D3) (Supervisor; Saeko Hayashi)
- Title
- A polarimetry look of T Tau Circumstellar Environment
- Speaker
- Speaker2 Moegi Yamamoto
- Affiliation
- SOKENDAI
- Title
- TBD
- Facilitator
- -Name：Kotomi Taniguchi
- Comment
- TV conference system is available connecting from Nobeyama, Hawaii, Mizusawa, and Okayama.
12月8日（木）
- キャンパス
- 三鷹
- セミナー名
- VLBIコロキウム
- 定例・臨時の別
- 定例
- 日時
- 12月8日（木曜日）15時～16時
- 場所
- 中央棟(南)2階VLBIセミナー室
- 講演者
- Fumie Tazaki
- 所属
- Mizusawa VLBI Observatory
- タイトル
- Highly resolved images at 43/86 GHz of the M87 jet base reconstructed with sparse modeling
- Abstract
- Sparse modeling is a new imaging technique with radio interferometry, which solves underdetermined
problem directly by assuming “sparsity” of the images. Using this new technique, we successfully
reconstructed M87 jet base observed with VLBA and VLBA+GBT at 43 and 86 GHz, respectively. The
43/86 GHz images represent the ridge structures of jets that start at 0.1/0.09 mas from the core,
which are closer to the core than those detected with CLEAN technique (0.6/0.13 mas from the core).
Measuring the core size, we found that the size is consistent with that of the CLEAN images. This
result shows that the core has been already resolved with CLEAN technique.
In the seminar, I will introduce the technique of sparse modeling briefly, and report the results
of M87 jet base imaging. - 連絡先
- -名前：倉持一輝
- 備考
- 英語、テレビ参加可
12月9日（金）
- Campus
- Mitaka
- Seminar
- DTA colloquium
- Regularly Scheduled/Sporadic
- Regularly Scheduled Date and time：09 December 2016, 13:30-14:30
- Place
- Conference Room, Cosmos Lodge
- Speaker
- Manos Chatzopoulos
- Affiliation
- Louisiana State University
- Title
- Pre-supernova Convection in Massive Stars
- Abstract
- The interior of a massive star in the final years prior to core-collapse supernova is in a state of violent unrest. Vigorous convective shell burning of silicon, oxygen and carbon drives large scale plume motions that can interact with each other and significantly alter the structure of the progenitor star. Under such conditions the star departs from perfect hydrostatic equilibrium and spherical symmetry and may experience dynamical pulses that, in some cases, can lead to episodic mass-loss. I will present preliminary results from multidimensional simulations of convection in massive stars in the few seconds to hours preceding the supernova explosion. The proper, dynamical multidimensional treatment of convection will be bench-marked against parametrized one-dimensional mixing length theory predictions and the implications for realistic core-collapse supernova progenitor models will be discussed. I will also present a new method to characterize pre-supernova convection, the method of Vector Spherical Harmonics decomposition, and discuss how it can be used to make realizations of core-collapse models in future simulations.
- Facilitator
- -Name：Tomoya Takiwaki
- Comment
- in English
12月9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
- 12月9日（金） 16:00-17:00
- 場所
- 大セミナー室
- 講演者
- Timo Prusti
- 所属
- ESA Scientific Support Office, ESTEC
- タイトル
- Gaia between the first and second data releases
- Abstract
- Gaia mission is underway conducting its nominal 5-year survey of the sky. The first Gaia data release (Gaia DR1) took place 14 September 2016. Exploitation is at full speed with preprints appearing on a regular basis. At the moment two and half years of routine phase has been completed and preparations for the second data release (Gaia DR2) are in full swing. In the presentation the status of the mission is outlined with a short explanation of some operational aspects and their impact on the mission. A selection of early results from Gaia DR1 is presented. With a few examples extracted from the early mission data the further potential of Gaia is demonstrated. An outline of the contents for Gaia DR2 is provided.
- 連絡先
- -名前：松田 有一
以上