{"id":517269,"date":"2022-11-28T13:32:33","date_gmt":"2022-11-28T10:32:33","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/astrophysicists-hunt-for-second-closest-supermassive-black-hole\/"},"modified":"2022-11-28T13:32:33","modified_gmt":"2022-11-28T10:32:33","slug":"astrophysicists-hunt-for-second-closest-supermassive-black-hole","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/astrophysicists-hunt-for-second-closest-supermassive-black-hole\/","title":{"rendered":"#Astrophysicists hunt for second-closest supermassive black hole"},"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-6a36ce182a9ab\" 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-6a36ce182a9ab\" 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\/astrophysicists-hunt-for-second-closest-supermassive-black-hole\/#%E2%80%9CAstrophysicists_hunt_for_second-closest_supermassive_black_hole%E2%80%9D\" >&#8220;Astrophysicists hunt for second-closest supermassive black hole&#8221;<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E2%80%9CAstrophysicists_hunt_for_second-closest_supermassive_black_hole%E2%80%9D\"><\/span>&#8220;Astrophysicists hunt for second-closest supermassive black hole&#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\/astrophysicists-hunt-f.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/astrophysicists-hunt-f.jpg\" data-sub-html=\"The ultra-faint Milky Way companion galaxy Leo I appears as a faint patch to the right of the bright star, Regulus. Credit: Scott Anttila Anttler\">\n<figure class=\"article-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2022\/astrophysicists-hunt-f.jpg\" alt=\"Astrophysicists hunt for second-closest supermassive black hole\" title=\"The ultra-faint Milky Way companion galaxy Leo I appears as a faint patch to the right of the bright star, Regulus. Credit: Scott Anttila Anttler\" width=\"800\" height=\"530\"\/><figcaption class=\"text-darken text-low-up text-truncate-js text-truncate mt-3\">\n                The ultra-faint Milky Way companion galaxy Leo I <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 as a faint patch to the right of the bright star, Regulus. Credit: Scott Anttila Anttler<br \/>\n            <\/figcaption><\/figure>\n<\/div>\n<\/div>\n<p>Two astrophysicists at the Harvard-Smithsonian Center for Astrophysics have suggested a way to observe what could be the second-closest supermassive black hole to Earth: a behemoth 3 million times the mass of the Sun, hosted by the dwarf galaxy Leo I.<\/p>\n<section class=\"article-banner first-banner ads-336x280\"><!-- \/4988204\/Phys_Story_InText_Box --><br \/>\n      <\/section>\n<p>The supermassive black hole, labeled Leo I*, was first <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/arxiv.org\/pdf\/2111.04770.pdf\">proposed<\/a> by an independent team of astronomers in late 2021. The team noticed stars picking up speed as they approached the center of the galaxy\u2014evidence for a black hole\u2014but directly imaging emission from the black hole was not possible.<\/p>\n<p>Now, CfA astrophysicists Fabio Pacucci and Avi Loeb suggest a new way to verify the supermassive black hole&#8217;s existence; their work is described in a study published today in the <i>Astrophysical Journal Letters<\/i>.<\/p>\n<p>&#8220;Black holes are very elusive objects, and sometimes they enjoy playing hide-and-seek with us,&#8221; says Fabio Pacucci, lead author of the <i>ApJ Letters<\/i> <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/doi.org\/10.3847\/2041-8213\/ac9b21\">study<\/a>. &#8220;Rays of light cannot escape their event horizons, but the environment around them can be extremely bright\u2014if enough material falls into their gravitational well. But if a black hole is not accreting mass, instead, it emits no light and becomes impossible to find with our telescopes.&#8221;<\/p>\n<p>This is the challenge with Leo I\u2014a dwarf galaxy so devoid of gas available to accrete that it is often described as a &#8220;fossil.&#8221; So, shall we relinquish any hope of observing it? Perhaps not, the astronomers say.<\/p>\n<p>&#8220;In our study, we suggested that a small amount of mass lost from stars wandering around the black hole could provide the accretion rate needed to observe it,&#8221; Pacucci explains. &#8220;Old stars become very big and red\u2014we call them red giant stars. Red giants typically have strong winds that carry a fraction of their mass to the environment. The space around Leo I* seems to contain enough of these ancient stars to make it observable.&#8221;<\/p>\n<p>&#8220;Observing Leo I* could be groundbreaking,&#8221; says Avi Loeb, the co-author of the study. &#8220;It would be the second-closest supermassive black hole after the one at the center of our galaxy, with a very similar mass but hosted by a galaxy that is a thousand times less massive than the Milky Way. This fact challenges everything we know about how galaxies and their central supermassive black holes co-evolve. How did such an oversized baby end up being born from a slim parent?&#8221;<\/p>\n<p>Decades of studies show that most massive galaxies host a supermassive black hole at their center, and the mass of the black hole is a tenth of a percent of the total mass of the spheroid of stars surrounding it. <\/p>\n<p>&#8220;In the case of Leo I,&#8221; Loeb continues, &#8220;we would expect a much smaller black hole. Instead, Leo I appears to contain a black hole a few million times the mass of the Sun, similar to that hosted by the Milky Way. This is exciting because <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/sciencee\/\" data-internallinksmanager029f6b8e52c=\"5\" title=\"Science\" target=\"_blank\" rel=\"noopener\">science<\/a> usually advances the most when the unexpected happens.&#8221;<\/p>\n<p>So, when can we expect an image of the black hole? <\/p>\n<p>&#8220;We are not there yet,&#8221; Pacucci says. <\/p>\n<p>The team has obtained telescope time on the space-borne Chandra X-ray Observatory and the Very Large Array radio telescope in New Mexico and is currently analyzing the new data. <\/p>\n<p>Pacucci says, &#8220;Leo I* is playing hide-and-seek, but it emits too much radiation to remain undetected for long.&#8221;<\/p>\n<div class=\"article-main__more p-4\">\n                                                                                        <strong>More information:<\/strong><br \/>\n                                                Accretion from Winds of RGB Stars May Reveal the Supermassive Black Hole in Leo I, <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\/ac9b21\">DOI: 10.3847\/2041-8213\/ac9b21<\/a><\/p><\/div>\n<div class=\"d-inline-block text-medium mt-4\">\n<p>                                                    Provided by<br \/>\n                                                                                                            Harvard-Smithsonian Center for Astrophysics<br \/>\n                                                                                                                <a rel=\"nofollow noopener\" target=\"_blank\" class=\"icon_open\" href=\"http:\/\/www.cfa.harvard.edu\/\"><br \/>\n                                                            <svg><use href=\"https:\/\/phys.b-cdn.net\/tmpl\/v6\/img\/svg\/sprite.svg#icon_open\" x=\"0\" y=\"0\"\/><\/svg><\/a><\/p><\/div>\n<p>                                        <!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>                                                    <strong>Citation<\/strong>:<br \/>\n                                                    Astrophysicists hunt for second-closest supermassive black hole (2022, November 28)<br \/>\n                                                    retrieved 28 November 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>\/2022-11-astrophysicists-second-closest-supermassive-black-hole.html<\/p>\n<p>                                             This document is subject to copyright. 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Credit: Scott Anttila Anttler Two astrophysicists at the Harvard-Smithsonian Center for Astrophysics have suggested a way to observe what could be the second-closest supermassive black hole to&#8230;<\/p>\n","protected":false},"author":1,"featured_media":517270,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/astrophysicists-hunt-f.jpg","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[],"class_list":["post-517269","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\/517269","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=517269"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/517269\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/517270"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=517269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=517269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=517269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}