Home > 国立天文台談話会 | 太陽系小天体セミナー > 2018.09.10-09.16

2018.09.10-09.16

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

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