IoA Seminar 2013 / 2013年度・東京大学・天文学教育研究センター・談話会†
次回以降の談話会†
第230回: 2013/09/06(Fri) 13:30-14:30†
Speaker: Alain Omont (Institut d'Astrophysique de Paris, CNRS and UPMC)†
Title: Herschel high-z sub-millimeter galaxies and gravitational lenses: H2O, a new diagnosis of their starburst†
Abstract: Herschel extragalactic wide surveys which have observed about 1000 deg2,
are discovering hundreds of thousands of high-z dusty sub-millimetrer galaxies,
and hundreds of high-z sub-millimeter strongly lensed galaxies. Gravitational magnification
there allows a gain by an order of magnitude in sensitivity in studying sub-millimeter galaxies
at high redshift (z~1-5). I will first summarize the main results of these submm surveys,
and the strategy for identifying, characterizing and following up these sources. I will mainly
highlight strongest lenses, highest redshift sources ( z~ 4-6) , and possible proto-clusters
detected by Planck and Herschel.
The easy detection of H2O lines redshifted into millimetre atmospheric windows is a good illustration.
I will first evoke Herschel results on H2O emission in local Ultra-Luminous Infrared Galaxies
(ULIRGs, SFR > 100 Mo/yr). Then millimetre detections of H2O lines will be presented
in similar objects at high-z. Observing a dozen of strong lenses from the H-ATLAS survey
with IRAM interferometer, we have shown that H2O is easily detectable at all high redshifts.
We show that the J=2 H2O line luminosity increases as LIR1.1-1.2. H2O lines provide thus
an important diagnosis in extreme starburst and possibly AGN conditions of warm gas
of these galaxies, especially those with LIR ~10^13 Lo (SFR>1000 Mo/yr), which have
no local equivalents but are abundant at z ~ 2-4. The weaker emission obtained
from the first results of the extension of the observations at J=3 levels might indicate that
the J=2 emitting medium is more extended than the cores of local ULIRGs. However,
modelling H2O emission remains difficult since complex processes take place such as
IR radiation transfer, shocks, cosmic rays, AGN feedback and XDR chemistry, outflows, etc.
Finally, I will evoke the rich prospects with ALMA for various possible extensions of such studies.
東京大学・天文学教育研究センターでは2003年4月から, 院生コロキウムに引き続き, 談話会を開いています.
第一線で活躍されている研究者の方々を講師にお招きし, 最先端の研究成果をお話しいただきます.
講師の方には, 大学院生の参加者のことも考慮し, レビュー的な側面も含めた上で, ご自身の研究紹介をお願いしています.
標準タイムテーブル†
| 13:30-14:30 | 院生コロキウム | 講義室 |
| 15:30-16:30 | 談話会 | 講義室 |
| 16:30- | お茶の時間 | 講義室横のお茶部屋~講師の方を交えて~ |
世話人†
- 河野 孝太郎: kkohno_at_ioa.s.u-tokyo.ac.jp (_at_を@に置き換えてください)
- 田辺 俊彦: ttanabe_at_ioa.s.u-tokyo.ac.jp (_at_を@に置き換えてください)
- 小西 真広: konishi_at_ioa.s.u-tokyo.ac.jp (_at_を@に置き換えてください)
| # | 日付 | 講演者 (所属) | タイトル |
| 230 | 2013/09/06(Fri) 13:30-14:30 | Alain Omont (Institut d'Astrophysique de Paris, CNRS and UPMC) | Herschel high-z sub-millimeter galaxies and gravitational lenses: H2O, a new diagnosis of their starburst |
| 231 | 2013/10/02(Wed) 11:00-12:00 | 岸本 真(MPI) | |
| 232 | 2013/10/03(Thu) | 紀 基樹(宇宙研) | |
| 2013/10/24(Thu) | 須田拓馬(国立天文台) | |
| 2013/11/14(Thu) | 鶴剛(京都大) | |
| 2013/11/21(Thu) | 岡朋治(慶應大) | |
| 2013/11/28(Thu) | 小山佑世(国立天文台) | |
| 2013/12/20(Fri) 13:30-14:30 | 松岡良樹(国立天文台/プリンストン大) | |
終了した談話会(今年度)†
詳細はこちら: 平成25 (2013) 年度談話会
| # | 日付 | 講演者 (所属) | タイトル |
| 229 | 2013/07/18(Thu) | 川中宣太(東大) | 天体起源の宇宙線電子・陽電子について |
| 228 | 2013/06/28(Fri) 13:30-14:30 | 井上開輝(近畿大) | ミニ重力レンズで探るダークマターの起源 |
| 227 | 2013/06/27(Thu) | 戸谷友則(東大) | すばるFMOSによる銀河赤方偏移サーベイで迫る宇宙の加速膨張：Fast Sound プロジェクトの進展状況 |
| 226 | 2013/06/13(Thu) | 新永浩子(国立天文台/チリ観測所) | Submillimeter Astronomy at Mauna Kea |
| 225 | 2013/06/06(Thu) | 高橋智子(国立天文台/チリ観測所) | Millimeter and Sbumillimeter studies of the Orion Molecular Filaments |
| 224 | 2013/05/30(Thu) | 田中賢幸(国立天文台) | On the formation time scale of massive cluster ellipticals based on deep near-IR spectroscopy at z~2 |
| 223 | 2013/05/23(Thu) | 南谷哲宏(東大/IoA) | Physical Properties of Dense Molecular Clumps in the Small Magellanic Cloud |
| 222 | 2013/05/16(Thu) | Gu Liyi(Univ. Tokyo/RESCEU) | Multi-wavelength Probe of Galaxy-Hot Plasma Interaction in Rich Clusters of Galaxies |
| 221 | 2013/05/09(Thu) | 遠藤 光(Delft University of Technology) | アストロフォトニクス：オンチップ超伝導分光計DESHIMAの研究開発 |
| 220 | 2013/04/26(Fri) 13:30-14:30 | Malte Schramm(IPMU) | The co-evolution between black hole and galaxy over the past 12 billion years. |
| 219 | 2013/04/18(Thu) | 真喜屋 龍(東大/IoA) | 宇宙論的銀河形成モデルへの新たなフィードバック機構の導入 |
| 218 | 2013/04/11(Thu) | 小麦真也(国立天文台ALMA東アジアセンター) | 星形成則の多変数化：星間物質の基本平面の発見 |
昨年度までの談話会†
![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
