메뉴 건너뛰기

제목 Galaxy Evolution in Dense Environments at z~2

연사 : Dr. Raphael Gobat (고등과학원)

언어 : 영어


요약

     The gradual infall of small dark matter halos onto larger ones has become a relatively straightforward aspect of the standard hierarchical formation paradigm. What happens to the baryons they contain, however, is less well understood. Of special relevance are the processes that regulate and ultimately suppress star formation in galaxies in the early universe and give rise to the quiescent galaxy population. The z=1.5-2.5 epoch is then particularly interesting as a transition period when global star formation in the universe peaks but also where the first ostensibly collapsed and virialized galaxy clusters appear, along with segregated galaxy populations. From a theoretical point of view, the mode of gas accretion in massive halos is also expected to change around this time, switching from a cold to a hot phase and affecting the build-up and evolution of the galaxies they host.

     A lot of effort has thus been devoted to the search for high-redshift structures, in particular galaxy clusters, through a variety of methods. However, as the limited area for which deep datasets are available remains relatively limited, only few massive z>1.5 structures have been found so far. Here I will focus on the regulation of star-formation in medium- and low-mass, X-ray detected halos at z~2 and its implication for galaxy quenching at high redshift. In particular, group-size halos, which are vastly more abundant than massive clusters, allow for true statistical studies and offer a novel way to probe environmental effects in this transitional epoch.





번호 제목 글쓴이 날짜 조회 수
공지 [09/8] Magnetizing the Universe during the Epoch of Reionization [17] webmaster 2017.09.03 205
51 [3/13] The effects of the cluster environment on dwarf galaxies - ram pressure and harassment webmaster 2015.03.07 6964
50 [4/3] GPS 교란상황에서의 항법기술 (Navigation in GPS-denied Environments) webmaster 2015.03.30 6494
49 [9/11] Compact binaries as gravitational-wave sources [61] webmaster 2015.09.10 6156
48 [5/1] 고해상도 SAR 위성 시스템 및 궤도상 성능 검증 결과 webmaster 2015.04.27 5834
47 [5/8] KMTNet 망원경을 이용한 초신성 연구 webmaster 2015.06.03 5675
» [3/25] Galaxy Evolution in Dense Environments at z~2 [30] webmaster 2016.03.21 4804
45 [5/27] 인공위성 자세제어 테스트베드 글로벌 연구 동향 및 CMG 기반 스마트 자세제어 기술 webmaster 2016.05.26 4528
44 [3/24] National Space Situational Awareness Initiative webmaster 2017.03.20 4265
43 [3/20] Evolution of Late-Type Galaxies in Galaxy Clusters: Cold gas webmaster 2015.03.16 3341
42 [5/13] Mid-infrared excess emission of galaxies and implications for the star formation history webmaster 2016.05.10 3072
41 [5/22] 인공위성 관제시스템 개발 및 운용 webmaster 2015.06.03 2918
40 [6/5] Carbon-Enhanced Metal-Poor (CEMP) Stars in the Milky Way webmaster 2015.06.03 2864
39 [12/13] Galaxy Transformation in the local Universe webmaster 2016.12.05 2506
38 [4/10] Chemical Composition of Components of Eclipsing Binaries webmaster 2015.04.27 2444
37 [5/29] Mapping the Large-Scale Structure around Galaxy Clusters webmaster 2015.06.03 2421
36 [4/24] Frontiers of Semi-Analytic Models: from ICL modelling to the galaxy population in proto-clusters webmaster 2015.04.27 2366
35 [4/8] 영상센서를 이용한 저궤도 행성위성 궤도결정 기법 webmaster 2016.04.05 2353
34 [3/4] Active Electro-Optical Systems for Space Applications (SLR and Laser Altimeter) webmaster 2016.03.04 2324
33 [4/1] Growth of Seed Black Holes webmaster 2016.03.28 2265
32 [3/17] A New Paradigm for Star Formation: Episodic Accretion webmaster 2017.03.15 2259