{"id":110924,"date":"2024-10-06T04:25:47","date_gmt":"2024-10-05T21:25:47","guid":{"rendered":"https:\/\/hotvideos24.online\/?p=110924"},"modified":"2024-10-06T04:25:47","modified_gmt":"2024-10-05T21:25:47","slug":"large-radio-bubble-detected-in-galaxy-ngc-4217","status":"publish","type":"post","link":"https:\/\/hotvideos24.online\/?p=110924","title":{"rendered":"Large radio bubble detected in galaxy NGC 4217"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<\/p>\n<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2024\/large-radio-bubble-det.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2024\/large-radio-bubble-det.jpg\" data-sub-html=\"The gray-scale background map shows the JVLA 3 GHz radio continuum emission in the halo of NGC 4217 at 7\u2032\u2032 angular resolution. Credit: Heesen et al., 2024.\">\n<figure class=\"article-img\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2024\/large-radio-bubble-det.jpg\" alt=\"Large radio bubble detected in galaxy NGC 4217\" title=\"The gray-scale background map shows the JVLA 3 GHz radio continuum emission in the halo of NGC 4217 at 7\u2032\u2032 angular resolution. Credit: Heesen et al., 2024.\" width=\"800\" height=\"530\"\/><figcaption class=\"text-darken text-low-up text-truncate-js text-truncate mt-3\">\n                The gray-scale background map shows the JVLA 3 GHz radio continuum emission in the halo of NGC 4217 at 7\u2032\u2032 angular resolution. Credit: Heesen et al., 2024.<br \/>\n            <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n<p>An international team of astronomers has performed radio observations of a star-forming galaxy known as NGC 4217. The observational campaign detected a large radio bubble in the galaxy&#8217;s halo. The finding was reported in a paper <a href=\"https:\/\/arxiv.org\/abs\/2409.15449\" target=\"_blank\" rel=\"noopener\">published<\/a> September 23 on the pre-print server <i>arXiv<\/i>.<\/p>\n<p>Located some 61.6 million light years away, NGC 4217 is a nearby edge-on star-forming <a href=\"https:\/\/phys.org\/tags\/spiral+galaxy\/\" rel=\"tag\" class=\"textTag\">spiral galaxy<\/a>. Previous observations of this galaxy have found that it contains dozens of absorbing dust structures with various morphologies. Moreover, a radio halo extending to about 16,000 light years from the galaxy&#8217;s star-forming disk has been identified.<\/p>\n<p>Recently, a group of astronomers led by Volker Heesen of Hamburg University in Germany, has employed the Jansky Very Large Array (JVLA) and with LOw Frequency ARray (LOFAR), to take a closer look at NGC 4217 in radio band.<\/p>\n<p>&#8220;We present new observations of the CHANG-ES [Continuum HAloes in Nearby Galaxies\u2014an EVLA Survey] galaxy NGC 4217 in S-band (2\u20134 GHz) which we combine with archival LoTSS-DR2 [LOFAR Two-metre Sky Survey data release 2] data at 144 MHz,&#8221; the researchers wrote in the paper.<\/p>\n<p>The observations detected a conspicuous extension of radio continuum emission in the north-western halo of NGC 4217. Further inspection of this emission allowed Heesen&#8217;s team to identify a very extended faint component that had previously evaded detection.<\/p>\n<p>The images show that this component has the morphology of an edge-brightened bubble extending out to a distance of 65,000 light years from the star-forming disk.<\/p>\n<p>According to the paper, the emission is boosted along the walls of NGC 4217&#8217;s radio bubble with a slight depression in the center of the bubble. The northeastern edge of the bubble is in particular prominent and the collected images suggest the potential presence of a shell on this side.<\/p>\n<p>The study found that the scale heights of the radio bubble are 19,200 and 9,400 light years, at 144 MHz and 3 GHz, respectively. Therefore, they are a few times larger than the typical scale heights of <a href=\"https:\/\/phys.org\/tags\/radio\/\" rel=\"tag\" class=\"textTag\">radio<\/a> bubbles in edge-on <a href=\"https:\/\/phys.org\/tags\/galaxies\/\" rel=\"tag\" class=\"textTag\">galaxies<\/a>. The total magnetic field strength of the bubble in NGC 4217 was measured to be about 11 \u00b5G.<\/p>\n<p>Furthermore, the astronomers estimated that at the edge of the bubble, the wind speed rises from approximately 300 to 600 km\/s, which is approximately at a level of the escape velocity of NGC 4217.<\/p>\n<p>This result suggests that the bubble can be inflated by about 10% of the kinetic energy injected by supernovae over its dynamical time-scale of 35,000 years. However, the researchers note that not all the <a href=\"https:\/\/phys.org\/tags\/kinetic+energy\/\" rel=\"tag\" class=\"textTag\">kinetic energy<\/a> can be used to inflate the bubble as large fractions may be radiated away.<\/p>\n<div class=\"article-main__more p-4\">\n<p><strong>More information:<\/strong><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\tV. Heesen et al, CHANG-ES XXXIV: a 20 kpc radio bubble in the halo of the star-forming galaxy NGC 4217, <i>arXiv<\/i> (2024). <a data-doi=\"1\" href=\"https:\/\/dx.doi.org\/10.48550\/arxiv.2409.15449\" target=\"_blank\" rel=\"noopener\">DOI: 10.48550\/arxiv.2409.15449<\/a><\/p>\n<div class=\"mt-3\">\n<p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<strong>Journal information:<\/strong><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/phys.org\/journals\/arxiv\/\"><cite>arXiv<\/cite><\/a><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"icon_open\" href=\"http:\/\/arxiv.org\/\" target=\"_blank\" rel=\"nofollow noopener\"><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<svg>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<use href=\"https:\/\/phys.b-cdn.net\/tmpl\/v6\/img\/svg\/sprite.svg#icon_open\" x=\"0\" y=\"0\"\/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/svg><br \/>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<p class=\"article-main__note mt-4\">\n\t\t\t\t\t\t\t\t\t\t\t\t  \u00a9 2024 Science X Network\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n<p>\t\t\t\t\t\t\t\t\t\t<!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>\n\t\t\t\t\t\t\t\t\t\t\t\t<strong>Citation<\/strong>:<br \/>\n\t\t\t\t\t\t\t\t\t\t\t\tLarge radio bubble detected in galaxy NGC 4217 (2024, October 5)<br \/>\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 5 October 2024<br \/>\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news\/2024-10-large-radio-galaxy-ngc.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n<p>\n\t\t\t\t\t\t\t\t\t\t\t This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no<br \/>\n\t\t\t\t\t\t\t\t\t\t\t part may be reproduced without the written permission. The content is provided for information purposes only.\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n<\/p><\/div>\n<\/p><\/div>\n<p><script id=\"facebook-jssdk\" async=\"\" src=\"https:\/\/connect.facebook.net\/en_US\/sdk.js\"><\/script><br \/>\n<br \/><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<br \/><div data-type=\"_mgwidget\" data-widget-id=\"1660802\">\r\n<\/div>\r\n<script>(function(w,q){w[q]=w[q]||[];w[q].push([\"_mgc.load\"])})(window,\"_mgq\");\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/phys.org\/news\/2024-10-large-radio-galaxy-ngc.html\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The gray-scale background map shows the JVLA 3 GHz radio continuum emission in the halo of NGC 4217 at 7\u2032\u2032 angular resolution. Credit: Heesen et al., 2024. An international team &hellip; <a href=\"https:\/\/hotvideos24.online\/?p=110924\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8628],"tags":[],"class_list":["post-110924","post","type-post","status-publish","format-standard","hentry","category-science","entry"],"_links":{"self":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/110924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=110924"}],"version-history":[{"count":0,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/110924\/revisions"}],"wp:attachment":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=110924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=110924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=110924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}