{"id":18295,"date":"2016-12-02T15:19:06","date_gmt":"2016-12-02T15:19:06","guid":{"rendered":"http:\/\/www.jomec.co.uk\/intercardiff\/?p=18295"},"modified":"2016-12-02T15:19:06","modified_gmt":"2016-12-02T15:19:06","slug":"research-team-makes-galactic-discovery","status":"publish","type":"post","link":"https:\/\/cardiffjournalism.co.uk\/intercardiff\/science-environment\/research-team-makes-galactic-discovery","title":{"rendered":"Research Team Makes Galactic Discovery"},"content":{"rendered":"<p><strong>New research changes what we thought we knew about galaxies.<\/strong><br \/>\n<figure id=\"attachment_19229\" aria-describedby=\"caption-attachment-19229\" style=\"width: 625px\" class=\"wp-caption alignnone\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-19229 size-medium\" title=\"Andromeda-Galaxy\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/andromeda-galaxy-625-625x530.jpg\" width=\"625\" height=\"530\" \/><figcaption id=\"caption-attachment-19229\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"wp-image-19229 size-medium\" title=\"Andromeda-Galaxy\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/andromeda-galaxy-625-625x530.jpg\" width=\"625\" height=\"530\" \/><\/noscript> The Andromeda Galaxy: A spiral or early-type galaxy<\/figcaption><\/figure><br \/>\nPictured: The Andromeda galaxy, from source.edu<br \/>\nLast month, Cardiff University astronomers led a discovery on galaxy evolution.<br \/>\n<figure id=\"attachment_18298\" aria-describedby=\"caption-attachment-18298\" style=\"width: 950px\" class=\"wp-caption alignnone\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-18298\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258.jpg\" alt=\"Above: The Hubble Tunong Fork Diagram shows how galaxies are currently classified.\" width=\"950\" height=\"713\" srcset=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258.jpg 950w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-300x225.jpg 300w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-768x576.jpg 768w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-500x375.jpg 500w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-400x300.jpg 400w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-100x75.jpg 100w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><figcaption id=\"caption-attachment-18298\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-18298\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258.jpg\" alt=\"Above: The Hubble Tunong Fork Diagram shows how galaxies are currently classified.\" width=\"950\" height=\"713\" srcset=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258.jpg 950w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-300x225.jpg 300w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-768x576.jpg 768w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-500x375.jpg 500w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-400x300.jpg 400w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/Hubble_Tuning_Fork_Diagram_medium-e1480691269258-100x75.jpg 100w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/noscript> Above: The Hubble Tunong Fork Diagram shows how galaxies are currently classified.<\/figcaption><\/figure><br \/>\nFor years, astronomy has categorised galaxies into 2 distinct classes: early-type galaxies and late type galaxies. The Hubble Tuning Fork diagram is commonly used by astronomers to illustrate this.<br \/>\nEarly-type galaxies are defined by spiral arms, dominated by gaseous, star-forming regions and blue stars. Late-type galaxies are dominated by bulges and red stars, deficient of gaseous star-forming regions.<br \/>\nThey are thought to be two completely different types of galaxies. According to research led by Stephen Eales and 4 other Cardiff astronomers, this is not necessarily the case.<br \/>\nProfessor Stephen Eales calls this research that \u201cshould basically make everyone round the world realise that they\u2019ve been doing the wrong thing for 20 years.\u201d<br \/>\n<figure id=\"attachment_19241\" aria-describedby=\"caption-attachment-19241\" style=\"width: 625px\" class=\"wp-caption alignnone\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-19241\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/IMG_6856-625x417.jpg\" alt=\"Professor Stephen Eales With His Telescope\" width=\"625\" height=\"417\" \/><figcaption id=\"caption-attachment-19241\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-medium wp-image-19241\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/IMG_6856-625x417.jpg\" alt=\"Professor Stephen Eales With His Telescope\" width=\"625\" height=\"417\" \/><\/noscript> Professor Stephen Eales With His Telescope<\/figcaption><\/figure><br \/>\nIt would now seem that one type of galaxy turns into the other over time. So, this is a more a case of galaxy evolution. \u201cThe idea is you have a star-forming galaxy in one population and this turns into the red part after the quenching sequence.\u201d Stephen Eales of Cardiff University, author of the paper publishing these results tells InterCardiff.<br \/>\n<figure id=\"attachment_18296\" aria-describedby=\"caption-attachment-18296\" style=\"width: 950px\" class=\"wp-caption alignnone\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-18296\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717.jpg\" alt=\"Pictured: A quasar with jets coming out of both sides of it.\" width=\"950\" height=\"594\" srcset=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717.jpg 950w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-300x188.jpg 300w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-768x480.jpg 768w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-500x313.jpg 500w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-200x125.jpg 200w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><figcaption id=\"caption-attachment-18296\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-full wp-image-18296\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717.jpg\" alt=\"Pictured: A quasar with jets coming out of both sides of it.\" width=\"950\" height=\"594\" srcset=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717.jpg 950w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-300x188.jpg 300w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-768x480.jpg 768w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-500x313.jpg 500w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/6988808-cosmic-quasar-e1480691361717-200x125.jpg 200w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/noscript> Pictured: A quasar with jets coming out of both sides of it.<\/figcaption><\/figure><br \/>\nThere are different theories for how the evolution of galaxies from being dominated by star forming regions and Population I stars (hot, young and blue stars) into those deficient of gas dominated by Population II stars (cool, older, red stars) may occur.<br \/>\nIt may be due to a quasar, an object thought to be powered by a massive black hole, from which jets emanate. Astronomers believe this forms in the middle of the galaxy, extracting its gas, leading to less star formation.<br \/>\nAlternatively, it could be due to a merger of galaxies. As two star-forming galaxies collide, gas is used up in the process. The 100-million-years process could also lead to less star formation, as seen in late-type galaxies.<br \/>\nMoreover, it would seem elliptical galaxies (which fall under the category of late-type galaxies) aren\u2019t completely disk-less, as once believed. Instead, they just have a very faint disk.<br \/>\nThis idea is not new. These results move in the footsteps of Michele Cappelari who has been a leader in this conversation and Matt Smith of Cardiff University, who showed elliptical galaxies contain 50% more gas than others thought.<br \/>\nCardiff was very important for the research, as they have connections with Herschel \u2013 a space telescope from ESA (European Space Agency), which cost 1 billion Euros. 323 galaxies were surveyed, at optical wavelengths over 4 years and the research took a few months to put together.<br \/>\n<figure id=\"attachment_18304\" aria-describedby=\"caption-attachment-18304\" style=\"width: 950px\" class=\"wp-caption alignnone\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-18304 size-full\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293.jpg\" alt=\"Pictured: Herschel spacecraft before launch.\" width=\"950\" height=\"632\" srcset=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293.jpg 950w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293-300x200.jpg 300w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293-768x511.jpg 768w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293-500x333.jpg 500w\" sizes=\"auto, (max-width: 950px) 100vw, 950px\" \/><figcaption id=\"caption-attachment-18304\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"wp-image-18304 size-full\" src=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293.jpg\" alt=\"Pictured: Herschel spacecraft before launch.\" width=\"950\" height=\"632\" srcset=\"https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293.jpg 950w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293-300x200.jpg 300w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293-768x511.jpg 768w, https:\/\/cardiffjournalism.co.uk\/intercardiff\/wp-content\/uploads\/sites\/12\/2016\/12\/HERSCHEL-e1480691671293-500x333.jpg 500w\" sizes=\"(max-width: 950px) 100vw, 950px\" \/><\/noscript> Pictured: Herschel spacecraft before launch.<\/figcaption><\/figure><br \/>\nThe limitations of this instrumentation though is not great angular resolution. This means the portion of a galaxy being is observed can\u2019t be high. However, Professor Eales explains, \u201cThis doesn\u2019t really matter much for our work, as we\u2019re using it for measurement not images.\u201d<\/p>\n<p>Professor Eales is arguing with these findings that galaxies gradually change over time. It will be interesting where the conversation among scientists, moves from here.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>New research results, let by a team at Cardiff University changes what we thought we knew about galaxies.<\/p>\n","protected":false},"author":434,"featured_media":19230,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[16],"tags":[],"coauthors":[],"class_list":["post-18295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-environment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Research Team Makes Galactic Discovery - InterCardiff<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Research Team Makes Galactic Discovery - 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