{"id":490177,"date":"2022-09-03T17:30:01","date_gmt":"2022-09-03T14:30:01","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/why-do-galaxies-stop-making-stars-a-huge-collision-in-space-provides-new-clues\/"},"modified":"2022-09-03T17:30:01","modified_gmt":"2022-09-03T14:30:01","slug":"why-do-galaxies-stop-making-stars-a-huge-collision-in-space-provides-new-clues","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/why-do-galaxies-stop-making-stars-a-huge-collision-in-space-provides-new-clues\/","title":{"rendered":"#Why do galaxies stop making stars? A huge collision in space provides new clues"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a502694bf31a\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #dd3333;color:#dd3333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #dd3333;color:#dd3333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a502694bf31a\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/buradabiliyorum.com\/en\/why-do-galaxies-stop-making-stars-a-huge-collision-in-space-provides-new-clues\/#%E2%80%9CWhy_do_galaxies_stop_making_stars_A_huge_collision_in_space_provides_new_clues%E2%80%9D\" >&#8220;Why do galaxies stop making stars? A huge collision in space provides new clues&#8221;<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E2%80%9CWhy_do_galaxies_stop_making_stars_A_huge_collision_in_space_provides_new_clues%E2%80%9D\"><\/span>&#8220;Why do galaxies stop making stars? A huge collision in space provides new clues&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/galaxy.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2022\/galaxy.jpg\" data-sub-html=\"Credit: Unsplash\/CC0 Public Domain\">\n<figure class=\"article-img\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2022\/galaxy.jpg\" alt=\"galaxy\" title=\"Credit: Unsplash\/CC0 Public Domain\" width=\"800\" height=\"530\"\/><figcaption class=\"text-darken text-low-up text-truncate-js text-truncate mt-3\">\n                Credit: Unsplash\/CC0 Public Domain<br \/>\n            <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n<p>Six billion years ago, two galaxies were colliding, their combined forces hurling a stream of gas hundreds of thousands of light years away. Reported this week by a team including Pitt astronomers, that unusual feature provides a new possible explanation for why galaxies stop forming stars.<\/p>\n<section class=\"article-banner first-banner ads-336x280\">\n         <!-- \/4988204\/Phys_Story_InText_Box --><\/p>\n<\/section>\n<p>&#8220;One of the biggest questions in astronomy is why the biggest galaxies are dead,&#8221; said David Setton, a sixth-year physics and astronomy Ph.D. student in the Kenneth P. Dietrich School of Arts and <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/sciencee\/\" data-internallinksmanager029f6b8e52c=\"5\" title=\"Science\" target=\"_blank\" rel=\"noopener\">Science<\/a>s. &#8220;What we saw is that if you take two galaxies and smash them together, that can actually rip gas out of the galaxy itself.&#8221;<\/p>\n<p>In the part of space we inhabit, most large galaxies have long ago stopped making new stars. Only recently have astronomers started looking further away\u2014and thus farther back in time\u2014with the tools to find recently dead galaxies and figure out how they got that way.<\/p>\n<p>The cold gas that coalesces to form stars may escape from galaxies by several means, blown away by black holes or supernovae. And there&#8217;s an even simpler possibility, that galaxies simply quiet down when they&#8217;ve used up all the raw materials for creating stars.<\/p>\n<p>Looking for examples of galaxies that recently shut off star formation, the team of researchers used the Sloan Digital Sky Survey, which has cataloged millions of galaxies with a telescope at Apache Point Observatory in New Mexico. Along with observations from the ground-based radio astronomy network ALMA, the researchers found such a &#8220;post-starburst&#8221; galaxy seven billion light years away that still showed signs of available star-forming fuel. &#8220;So then we needed an explanation,&#8221; said Setton. &#8220;If it has gas, why is it not forming stars?&#8221;<\/p>\n<p>A second pass with the Hubble Space Telescope then revealed the distinctive &#8220;tail&#8221; of gas extending from the galaxy. From that feature, like forensic examiners working through a telescope, the researchers were able to reconstruct the galaxies&#8217; collision and the tremendous gravitational force that tore apart stars and flung a stream of gas a distance more than two Milky Ways laid end-to-end.<\/p>\n<p>&#8220;That was the smoking gun,&#8221; said Setton. &#8220;We were all so struck by it. You just don&#8217;t see this much gas this far away from the galaxy.&#8221;<\/p>\n<p>The team, including Pitt Physics and Astronomy Associate Professor Rachel Bezanson and alum Margaret Verrico (A&amp;S &#8217;21) along with colleagues at Texas A&amp;M University and several other institutions, reported their results in the <i>Astrophysical Journal Letters<\/i> on Aug. 30.<\/p>\n<p>Such an extreme meeting of galaxies is likely rare, Setton said, but because gravity pulls large objects into dense groups, such an event is more common than you might anticipate. &#8220;There are all these big voids in space, but all of the biggest galaxies live in the spaces where all of the other big galaxies live,&#8221; he said. &#8220;You expect to see these sorts of big collisions once every 10 billion years or so for a system this massive.&#8221;<\/p>\n<p>Setton&#8217;s role on the project was to determine the galaxy&#8217;s size and shape, and he discovered that other than the tail, the post-merger galaxy looked surprisingly normal. Once the tail fades in a few hundred million years, it may look just like any other dead galaxy\u2014further suggesting that the process may be more common than it <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/download-scripts-themes-apps\/\" data-internallinksmanager029f6b8e52c=\"9\" title=\"Download Scripts &amp; Themes &amp; Apps\" target=\"_blank\" rel=\"noopener\">app<\/a>ears, something the team is following up now with another survey.<\/p>\n<p>Along with providing clues for how the universe became the way it is, Setton said such collisions reflects one possibility for the future of our own galaxy.<\/p>\n<p>&#8220;If you go do a dark place and look up at the night sky, you can see the Andromeda Galaxy, which in five billion years might do exactly this to our Milky Way,&#8221; Setton said. &#8220;It&#8217;s helping answer the fundamental question of what&#8217;s going to happen to the Milky Way in the future.&#8221;<\/p>\n<hr\/>\n<div class=\"article-main__explore my-4 d-print-none\">\n<p>                                            ALMA witnesses deadly star-slinging tug-of-war between merging galaxies\n                                        <\/p><\/div>\n<hr class=\"mb-4\"\/>\n<div class=\"article-main__more p-4\">\n                                                                                                <strong>More information:<\/strong><br \/>\n                                                Justin S. Spilker et al, Star Formation Suppression by Tidal Removal of Cold Molecular Gas from an Inter<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/social-mediaa\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Social Media\" target=\"_blank\" rel=\"noopener\">media<\/a>te-redshift Massive Post-starburst Galaxy, <i>The Astrophysical Journal Letters<\/i> (2022).  <a rel=\"nofollow noopener\" target=\"_blank\" data-doi=\"1\" href=\"https:\/\/dx.doi.org\/10.3847\/2041-8213\/ac75ea\">DOI: 10.3847\/2041-8213\/ac75ea<\/a><\/p><\/div>\n<div class=\"d-inline-block text-medium my-4\">\n                                                Provided by<br \/>\n                                                                                                    University of Pittsburgh<br \/>\n                                                                                                        <a rel=\"nofollow noopener\" target=\"_blank\" class=\"icon_open\" href=\"http:\/\/www.pitt.edu\/\"><br \/>\n                                                        <svg>\n                                                            <use href=\"https:\/\/phys.b-cdn.net\/tmpl\/v6\/img\/svg\/sprite.svg#icon_open\" x=\"0\" y=\"0\"\/>\n                                                        <\/svg><br \/>\n                                                    <\/a><\/p><\/div>\n<p>                                        <!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>                                                 <strong>Citation<\/strong>:<br \/>\n                                                 Why do galaxies stop making stars? A huge collision in space provides new clues (2022, September  3)<br \/>\n                                                 retrieved  4 September 2022<br \/>\n                                                 from https:\/\/phys.org\/<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/news\/\" data-internallinksmanager029f6b8e52c=\"2\" title=\"News\" target=\"_blank\" rel=\"noopener\">news<\/a>\/2022-09-galaxies-stars-huge-collision-space.html<\/p>\n<p>                                            This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no<br \/>\n                                            part may be reproduced without the written permission. 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A huge collision in space provides new clues&#8221; Credit: Unsplash\/CC0 Public Domain Six billion years ago, two galaxies were colliding, their combined forces hurling a stream of gas hundreds of thousands of light years away. Reported this week by a team including Pitt astronomers, that unusual feature provides a&#8230;<\/p>\n","protected":false},"author":1,"featured_media":490178,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2022\/galaxy.jpg","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[],"class_list":["post-490177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciencee"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/490177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=490177"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/490177\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/490178"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=490177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=490177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=490177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}