{"id":127,"date":"2012-10-04T10:30:30","date_gmt":"2012-10-04T01:30:30","guid":{"rendered":"http:\/\/guas-astronomy.jp\/weblog2\/?p=127"},"modified":"2016-06-16T11:34:59","modified_gmt":"2016-06-16T02:34:59","slug":"galactic-scale_outflow_at_z4_r","status":"publish","type":"post","link":"https:\/\/guas-astronomy.jp\/weblog\/?p=127","title":{"rendered":"Galactic-scale Outflow at z>4 revealed by Adaptive Optics \/ Spectroscopic Follow-up Observation of a High-redshift Protocluster Candidate"},"content":{"rendered":"<p>[Speaker 1]<br \/>\nTakatoshi Shibuya<br \/>\n[Title]<br \/>\nGalactic-scale Outflow at z>4 revealed by Adaptive Optics<br \/>\n[Abstract]<br \/>\nCharacterization of the large-scale galactic outflow is very important to understand many astrophysical phenomena at high-z, such as the escape of LyA photons from the galaxy, the relation between the galaxy populations, and IGM metal-enrichment history. Although galactic outflows are ubiquitously found in star-forming galaxies at 2<z<3, the outflows in very few galaxies beyond z=4 have been examined so far due to the surface brightness dimming. To overcome this difficulty, we are performing the survey for the galactic outflow at z=4-5 by utilizing an unique combination of high sensitivity of Adaptive Optics and large amplification of gravitational lensing by foreground clusters. In this colloquium, we present the results of a deep spectroscopy for a lensed galaxy at z~4 with the Adaptive Optics system AO188+IRCS on Subaru Telescope.\n------------------------------------------------------------------------------------------\n------------------------------------------------------------------------------------------\n[Speaker 2]\nJun Toshikawa\n[Title]\nSpectroscopic Follow-up Observation of a High-redshift Protocluster Candidate\n[Abstract]\nGalaxy clusters play an important role in the large-scale structure of the universe and galaxy evolution.\nProtoclusters, that are progenitors of galaxy clusters, would provide a great deal of information on the primordial condition at their birth.\nHowever, it is difficult to discover them due to very low number density in the early universe, and only a few protoclusters were discovered currently.\nIn order to approach the question of cluster formation, we have to begin with searching other protoclusters.\nWe have carried out the survey of galaxy distribution at z~6 in the very wide field of the CFHT Legacy Survey Deep fields (~4 square degree),and found two protocluster candidates.\nSubsequently, spectroscopic follow-up observation was conducted for one of the candidates with Gemini\/GMOS.\nAlthough there are some indication of a protoclsuter, we could not clearly confirm due to the small sample.\nIn the colloquium, we present the results of the follow-up observation.\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[Speaker 1] Takatoshi Shibuya [Title] Galactic-scale Outflow at z>4 revealed by Adaptive Optics [Abstract] Cha [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,5],"tags":[],"class_list":["post-127","post","type-post","status-publish","format-standard","hentry","category-6","category-5"],"_links":{"self":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts\/127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=127"}],"version-history":[{"count":0,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=\/wp\/v2\/posts\/127\/revisions"}],"wp:attachment":[{"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guas-astronomy.jp\/weblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}