9月11日(火)13:30~15:00 太陽系小天体セミナー 南棟2階会議室
Sep 11 Tue Solar System Minor Body Seminar Conference Room, South Bldg.2F
9月14日(金)16:00~17:00 国立天文台談話会 すばる棟 大セミナー室
Sep 14 Fri NAOJ Seminar Large Seminar Room
詳細は以下をご覧下さい。
9月11日(火)
- 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
- 9月11日(火曜日)13時30分~15時
- 場所
- 南棟2階会議室
- 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
9月14日(金)
- Campus
- Mitaka
- Seminar
- NAOJ seminar
- Regularly Scheduled/Sporadic
- Scheduled
- Date and time
- Fri 14 Sep. 16:00~17:00
- Place
- Large Seminar Room
- Speaker
- Stephen Eales
- Affiliation
- Cardiff University
- Title
- A New Paradigm for Galaxy Evolution and Wide-Field Submillimetre Surveys of the Early Universe
- Abstract
-
I will present some results from the wide-area Herschel surveys. First, I will show that a submillimetre
survey of the nearby universe reveals a very different galaxy population than an optical survey. Whereas
the galaxies in an optical survey fall in a colour-absolute-magnitude diagram on a red sequence and
a blue cloud with a green valley in between, galaxies found in a submm survey form a ‘green mountain’.
I show that all of these distributions can be explained by a single Galaxy Sequence and do not separate populations
of star-forming galaxies, on a ‘Main Sequence’, and passive galaxies. The combination of the Herschel
and optical views of the nearby universe implies that galaxies form a single population, with galaxy
morphology and star-formation efficiency gradually changing along the Galaxy Sequence,
and suggests that galaxy evolution is a rather gentle process and does not require catastrophic quenching.
Second, I will show that wide-field submillimetre surveys
reveal a population of high-redshift (3<z<6) galaxies, a combination of lensed ultraluminous infrared galaxies
and unlensed hyper-luminous infrared galaxies. I will present ALMA observations of some of these objects,
which imply that these are galaxies in the process of formation.
Finally, I will describe the wide-field millimetre surveys that we intend to carry out with a new camera,
MUSCAT, that we will be using on the Large Millimetre Telescope
this winter. I will show that surveys with MUSCAT and another camera, TOLTEC, have the potential to
push the study of dusty galaxies out to 6<z<9. - Facilitator
- -Name: Matsuda, Yuichi