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2013.11.11-11.17

11月11日(月)13:30~15:00  太陽系小天体セミナー   南棟2階会議室
Nov 11 Mon  Solar System Minor Body Seminar   Conference Room, South Bldg. 2F

11月13日(水)10:30~12:00  総研大コロキウム   中央棟(北)1F講義室
Nov 13 Wed  SOKENDAI colloquium       Lecture Room

11月15日(金)16:00~17:00  国立天文台談話会   大セミナー室
Nov 15 Fri  NAOJ Seminar           Large Seminar Room

詳細は以下をご覧下さい。

11月11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
11月11日(月曜日)13:30~15:00
場所
南棟2階会議室
講演者
榎本孝之
所属
総研大
タイトル
2012年のふたご座流星群に属する微光流星の自動検出手法の紹介
Abstract
2012年のふたご座流星群を、木曽観測所シュミット望遠鏡+広視野高感度CMOSセンサーで観測したデータの解析を行った。微光流星は背景の明るさと大差が無いため、効率のよい自動検出を行うには工夫をする必要があった。本発表では、私が考案した自動検出の手法をメインに成果を報告する。
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

11月13日(水)

Campus
Mitaka
Seminar Name
SOKENDAI colloquium
Regular/Irregular
Regular
Date
10:30-12:00, Nov 13, 2013
Place
Lecture Room
Speaker 1
Pan Hsi-An
   D3, SOKENDAI, Nobeyama(supervisor : Nario Kuno)
Title
Environmental Dependence of Star Formation in Nearby Barred Spiral Galaxies
Abstract
I will introduce environmental dependence of star formation in terms of two aspects: amount of gas and the possible dynamical influence from galactic bar.
Speaker 2
Jun Toshikawa
   D2, SOKENDAI, Mitaka(supervisor : Nobunari Kashikawa)

Title
Complete Follow-up Spectroscopy of a Protocluster at z~6
Abstract
In the local universe, galaxy clusters play central roles in the large-scale structure
of the universe, and such high-density environments have large effects on galaxy
properties. For understanding the structure formation and galaxy evolution, it is
crucial to directly investigate the progenitors of galaxy clusters. Galaxy protoclusters
are overdense regions in the early universe and considered to grow into rich clusters
seen in the present-day universe. Therefore, protoclusters provide a great deal of
information of early stage of cluster formation for large-scale structure and
environmental effects.
We showed our discovery of a z~6 protocluster in the Subaru Deep Field in the
previous colloquium (Toshikawa et al. 2012, ApJ, 750, 137). And then, we have
carried out deeper and wider follow-up spectroscopy of this protocluster than
previous ones. All candidates of protocluster galaxies were observed with long
exposures, and spectroscopic survey was extended to surrounding region to seek
the large-scale structure. In the colloquium, we present the results of the follow-up
spectroscopy of the protocluster and discuss galaxy distribution and properties at
this first site of galaxy cluster formation.
Organizer
Name : Ayumu Matsuzawa
Comment
TV conference system is available connecting from Nobeyama, Hawaii,
Mizusawa, and Okayama

11月15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
11月15日(金) 16:00-17:00
場所
大セミナー室
講演者
Grant J. Mathews
所属
University of Notre Dame
タイトル
“The Case for Dark Flow: Theory and Observational evidence for and against cosmic flow, quantum entanglement and parallel universes”
Abstract
In this talk we will review the case for and against a bulk cosmic motion resulting from the quantum entanglement of our universe with the multiverse beyond our horizon. Within the current theory for the selection of the initial state of the universe from the landscape multiverse there is a generic prediction that pre-inflation quantum entanglement with other universes should give rise to a cosmic bulk flow with a correlation length of order horizon size and a velocity field relative to the expansion frame of the universe. Indeed, the parameters of this motion are are tightly constrained. A robust prediction can be deduced indicating that there should be an overall motion of of about 800 km/s relative to the background space time as defined by the cosmic microwave background (CMB). This talk will summarize the underlying theoretical motivation for this hypothesis. Of course our motion relative to the background space time (CMB dipole) has been known for decades and is generally attributed to the gravitational pull of the local super cluster. However, this cosmic peculiar velocity field has been recently deduced out to very large distances well beyond that of the local super cluster by using X-ray galaxy clusters as tracers of matter motion. This is achieved via the kinematic component of the Sunyaev-Zeldovich (KSZ) effect produced by Compton scattering of cosmic microwave background photons from the local hot intracluster gas. As such, this method measures peculiar velocity directly in the frame of the cluster. Similar attempts by our group and others have attempted to independently assess this bulk flow via Type Ia supernova redshifts. In this talk we will review the observation case for and against the existence of this bulk flow based upon the observations and predictions of the theory. If this interpretation is correct it has profound implications in that we may be observing for the first time both the physics that occurred before the big bang and the existence of the multiverse beyond our horizon.
連絡先
名前:田中雅臣

以上

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