{"id":107,"date":"2017-02-01T09:45:46","date_gmt":"2017-02-01T08:45:46","guid":{"rendered":"https:\/\/obas-matlas.u-strasbg.fr\/WP\/?p=107"},"modified":"2019-01-31T16:37:29","modified_gmt":"2019-01-31T15:37:29","slug":"globular-clusters-as-tracers-of-fine-structure-in-the-dramatic-shell-galaxy-ngc-474","status":"publish","type":"post","link":"https:\/\/matlas.astro.unistra.fr\/WP\/?p=107","title":{"rendered":"Globular Clusters as Tracers of Fine Structure in the Dramatic Shell Galaxy NGC 474"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><a href=\"http:\/\/obas-matlas.u-strasbg.fr\/WP\/?attachment_id=118\"><img loading=\"lazy\" width=\"1024\" height=\"926\" src=\"http:\/\/obas-matlas.u-strasbg.fr\/WP\/wp-content\/uploads\/2017\/02\/Capture-d\u2019e\u0301cran-2019-01-05-a\u0300-09.59.19-1024x926.png\" alt=\"\" class=\"wp-image-118\" srcset=\"https:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2017\/02\/Capture-d\u2019e\u0301cran-2019-01-05-a\u0300-09.59.19-1024x926.png 1024w, https:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2017\/02\/Capture-d\u2019e\u0301cran-2019-01-05-a\u0300-09.59.19-300x271.png 300w, https:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2017\/02\/Capture-d\u2019e\u0301cran-2019-01-05-a\u0300-09.59.19-768x694.png 768w, https:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2017\/02\/Capture-d\u2019e\u0301cran-2019-01-05-a\u0300-09.59.19.png 1168w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><figcaption>Lim et al., 2017<\/figcaption><\/figure>\n\n\n\n<p>Globular clusters (GCs) are some of the most visible tracers of the merging and accretion histories of galaxy halos. Metal-poor GCs, in particular, are thought to arrive in massive galaxies largely through dry, minor merging events, but it is rare to see a direct connection between GCs and visible stellar streams. NGC 474 is a post-merger early-type galaxy with dramatic fine structures made of concentric shells and radial streams that have been more clearly revealed by deep imaging. We present a study of GCs in NGC 474 to better establish the relationship between merger-induced fine structure and the GC system. <\/p>\n\n\n\n<!--more-->\n\n\n\n<p>We find that many GCs are superimposed on visible streams and shells, and about 35% of GCs outside 3{R}<sub>{{e<\/sub>},{galaxy}} are located in regions of fine structure. The spatial correlation between GCs and fine structure is significant at the 99.9% level, which shows that this correlation is not coincidental. The colors of GCs on fine structures are mostly blue, and we also find an intermediate-color population that is dominant in the central region and that will likely passively evolve to have colors consistent with a traditional metal-rich GC population. The association of the blue GCs with fine structures is direct confirmation that many metal-poor GCs are accreted onto massive galaxy halos through merging events and that the progenitors of these mergers are sub-{L}<sup>\\star&nbsp;<\/sup>galaxies.<\/p>\n\n\n\n<p>Published in <a href=\"http:\/\/adsabs.harvard.edu\/abs\/2017ApJ...835..123L\">Lim et al. (2017), ApJ 835, 123<\/a><br>See also image release of <a href=\"https:\/\/obas-matlas.u-strasbg.fr\/WP\/?p=105\">NGC 474<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Globular clusters (GCs) are some of the most visible tracers of the merging and accretion histories of galaxy halos. Metal-poor GCs, in particular, are thought to arrive in massive galaxies largely through dry, minor merging events, but it is rare to see a direct connection between GCs and visible stellar streams. NGC 474 is a &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/matlas.astro.unistra.fr\/WP\/?p=107\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Globular Clusters as Tracers of Fine Structure in the Dramatic Shell Galaxy NGC 474&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/posts\/107"}],"collection":[{"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=107"}],"version-history":[{"count":6,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/posts\/107\/revisions"}],"predecessor-version":[{"id":328,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/posts\/107\/revisions\/328"}],"wp:attachment":[{"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}