{"id":969,"date":"2023-06-24T17:24:20","date_gmt":"2023-06-24T15:24:20","guid":{"rendered":"http:\/\/matlas.astro.unistra.fr\/WP\/?p=969"},"modified":"2024-08-22T11:39:34","modified_gmt":"2024-08-22T09:39:34","slug":"sdss-j022732-88-011349-3-a-nucleus-of-a-disrupted-dwarf-galaxy-next-to-ngc936","status":"publish","type":"post","link":"https:\/\/matlas.astro.unistra.fr\/WP\/?p=969","title":{"rendered":"The creation of a massive UCD by tidal threshing from NGC 936"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" width=\"617\" height=\"314\" src=\"http:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2024\/08\/Capture-de\u0301cran-2024-08-22-a\u0300-09.54.39.png\" alt=\"\" class=\"wp-image-979\" srcset=\"https:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2024\/08\/Capture-de\u0301cran-2024-08-22-a\u0300-09.54.39.png 617w, https:\/\/matlas.astro.unistra.fr\/WP\/wp-content\/uploads\/2024\/08\/Capture-de\u0301cran-2024-08-22-a\u0300-09.54.39-300x153.png 300w\" sizes=\"(max-width: 617px) 100vw, 617px\" \/><figcaption>The tidally disrupted dwarf galaxy MATLAS-167<\/figcaption><\/figure>\n\n\n\n<p>We study a compact nucleus embedded in an early-type dwarf galaxy, MATLAS-167, which is in the process of disruption by the tidal force of the neighbouring giant S0 galaxy, NGC 936, in a group environment. Using the imaging data of the MATLAS survey, we analyse the stellar tidal tail of MATLAS-167 and its central compact nucleus, designated as NGC 936_UCD. We find that NGC 936_UCD has a luminosity of M<sub>g<\/sub>\u00a0= -11.43 \u00b1 0.01 mag and a size of 66.5 \u00b1 17 pc, sharing the global properties of ultra-compact dwarf galaxies (UCDs) but significantly larger and brighter compared to the typical UCD populations observed in the Virgo cluster. <\/p>\n\n\n\n<!--more-->\n\n\n\n<p>By integrating the total luminosity of both the tidal stream and MATLAS-167, we estimate that the disrupted dwarf progenitor possesses a luminosity of M<sub>g<\/sub>\u00a0= -15.92 \u00b1 0.06 mag, a typical bright early-type dwarf galaxy luminosity. With the help of the optical spectrum observed by the SDSS survey, we derive the simple stellar population properties of NGC 936_UCD: a light-weighted age of 5.6 \u00b1 0.7 Gyr and metallicity of [Z\/H] = -0.83 \u00b1 0.3 dex. Our findings suggest that tidal threshing is a possible formation mechanism of bright UCD populations in close proximity to giant galaxies.<\/p>\n\n\n\n<p>Paudel et al., 2023, <a href=\"https:\/\/ui.adsabs.harvard.edu\/abs\/2023MNRAS.526L.136P\/abstract\" data-type=\"URL\" data-id=\"https:\/\/ui.adsabs.harvard.edu\/abs\/2023MNRAS.526L.136P\/abstract\">MNRAS 526L,136<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We study a compact nucleus embedded in an early-type dwarf galaxy, MATLAS-167, which is in the process of disruption by the tidal force of the neighbouring giant S0 galaxy, NGC 936, in a group environment. Using the imaging data of the MATLAS survey, we analyse the stellar tidal tail of MATLAS-167 and its central compact &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/matlas.astro.unistra.fr\/WP\/?p=969\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;The creation of a massive UCD by tidal threshing from NGC 936&#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\/969"}],"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=969"}],"version-history":[{"count":4,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/posts\/969\/revisions"}],"predecessor-version":[{"id":997,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=\/wp\/v2\/posts\/969\/revisions\/997"}],"wp:attachment":[{"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/matlas.astro.unistra.fr\/WP\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}