{"id":21067,"date":"2020-02-05T06:05:17","date_gmt":"2020-02-05T11:05:17","guid":{"rendered":"https:\/\/hobbyspace.com\/Blog\/?p=21067"},"modified":"2020-02-04T21:23:09","modified_gmt":"2020-02-05T02:23:09","slug":"eso-alma-spots-red-giant-engulfing-companion-star","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=21067","title":{"rendered":"ESO: ALMA spots red giant engulfing companion star"},"content":{"rendered":"<p>The latest report from the European Southern Observatory (<a href=\"https:\/\/www.eso.org\/public\/news\/eso2002\/?lang\">ESO<\/a>):<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"https:\/\/www.eso.org\/public\/news\/eso2002\/?lang\">ALMA catches beautiful outcome of stellar fight<\/a><\/strong><\/p>\n<figure id=\"attachment_21068\" aria-describedby=\"caption-attachment-21068\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.eso.org\/public\/images\/eso2002a\/\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"21068\" data-permalink=\"https:\/\/hobbyspace.com\/Blog\/?attachment_id=21068\" data-orig-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/02\/eso2002a1.jpg\" data-orig-size=\"700,504\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;ALMA (ESO\/NAOJ\/NRAO), Olofsson e&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;This new ALMA image shows the outcome of a stellar fight: a complex and stunning gas environment surrounding the binary HD101584. The colours represent speed, going from blue \\u2014 gas moving the fastest towards us \\u2014 to red \\u2014 gas moving the fastest away from us. Jets, almost along the line of sight, propel the material in blue and red. The stars in the binary are located at the single bright dot at the centre of the ring-like structure shown in green, which is moving with the same velocity as the system as a whole along the line of sight. Astronomers believe this ring has its origin in the material ejected as the lower mass star in the binary spiralled towards its red-giant partner.&quot;,&quot;created_timestamp&quot;:&quot;1580904000&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;ALMA image of HD101584&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"ALMA image of HD101584\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;This new ALMA image shows the outcome of a stellar fight: a complex and stunning gas environment surrounding the binary HD101584. The colours represent speed, going from blue \u2014 gas moving the fastest towards us \u2014 to red \u2014 gas moving the fastest away from us. Jets, almost along the line of sight, propel the material in blue and red. The stars in the binary are located at the single bright dot at the centre of the ring-like structure shown in green, which is moving with the same velocity as the system as a whole along the line of sight. Astronomers believe this ring has its origin in the material ejected as the lower mass star in the binary spiralled towards its red-giant partner.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/02\/eso2002a1.jpg\" class=\"size-medium wp-image-21068\" src=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/02\/eso2002a1-500x360.jpg\" alt=\"\" width=\"500\" height=\"360\" srcset=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/02\/eso2002a1-500x360.jpg 500w, https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/02\/eso2002a1.jpg 700w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><figcaption id=\"caption-attachment-21068\" class=\"wp-caption-text\">This new ALMA image shows the outcome of a stellar fight: a complex and stunning gas environment surrounding the binary HD101584. The colours represent speed, going from blue \u2014 gas moving the fastest towards us \u2014 to red \u2014 gas moving the fastest away from us. Jets, almost along the line of sight, propel the material in blue and red. The stars in the binary are located at the single bright dot at the centre of the ring-like structure shown in green, which is moving with the same velocity as the system as a whole along the line of sight. Astronomers believe this ring has its origin in the material ejected as the lower mass star in the binary spiralled towards its red-giant partner. <a href=\"https:\/\/www.eso.org\/public\/images\/eso2002a\/\">Click for larger images<\/a><\/figcaption><\/figure>\n<p>Astronomers using the <a href=\"https:\/\/www.almaobservatory.org\/en\/home\/\">Atacama Large Millimeter\/submillimeter Array<\/a> (ALMA), in which ESO is a partner, have spotted a peculiar gas cloud that resulted from a confrontation between two stars. One star grew so large it engulfed the other which, in turn, spiralled towards its partner provoking it into shedding its outer layers.<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"1600\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/bfI-3Uwq0HA?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p dir=\"ltr\">Like humans, stars change with age and ultimately die. For the Sun and stars like it, this change will take it through a phase where, having burned all the hydrogen in its core, it swells up into a large and bright <a href=\"https:\/\/en.wikipedia.org\/wiki\/Red_giant\">red-giant star<\/a>. Eventually, the dying Sun will lose its outer layers, leaving behind its core: a hot and dense star called a white dwarf.<\/p>\n<p dir=\"ltr\" style=\"padding-left: 40px;\"><em>\u201cThe star system HD101584 is special in the sense that this \u2018death process\u2019 was terminated prematurely and dramatically as a nearby low-mass companion star was engulfed by the giant,\u201d<\/em><\/p>\n<p dir=\"ltr\">said Hans Olofsson of the Chalmers University of Technology, Sweden, who led a recent study, published in Astronomy &amp; Astrophysics, of this intriguing object.<\/p>\n<p dir=\"ltr\">Thanks to new observations with <a href=\"https:\/\/www.eso.org\/public\/teles-instr\/alma\/\">ALMA<\/a>, complemented by data from the ESO-operated Atacama Pathfinder EXperiment (<a href=\"https:\/\/www.eso.org\/public\/teles-instr\/apex\/\">APEX<\/a>), Olofsson and his team now know that what happened in the double-star system HD101584 was akin to a stellar fight. As the main star puffed up into a red giant, it grew large enough to swallow its lower-mass partner. In response, the smaller star spiralled in towards the giant\u2019s core but didn\u2019t collide with it. Rather, this manoeuvre triggered the larger star into an outburst, leaving its gas layers dramatically scattered and its core exposed.<\/p>\n<p dir=\"ltr\">The team says the complex structure of the gas in the HD101584 nebula is due to the smaller star\u2019s spiralling towards the red giant, as well as to the jets of gas that formed in this process. As a deadly blow to the already defeated gas layers, these jets blasted through the previously ejected material, forming the rings of gas and the bright bluish and reddish blobs seen in the nebula.<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"1600\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/zQvyaULO3YY?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p dir=\"ltr\">A silver lining of a stellar fight is that it helps astronomers to better understand the final evolution of stars like the Sun.<\/p>\n<p dir=\"ltr\" style=\"padding-left: 40px;\"><em>\u201cCurrently, we can describe the death processes common to many Sun-like stars, but we cannot explain why or exactly how they happen. HD101584 gives us important clues to solve this puzzle since it is currently in a short transitional phase between better studied evolutionary stages. With detailed images of the environment of HD101584 we can make the connection between the giant star it was before, and the stellar remnant it will soon become,\u201d<\/em><\/p>\n<p dir=\"ltr\">says co-author Sofia Ramstedt from Uppsala University, Sweden.<\/p>\n<p dir=\"ltr\">Co-author Elizabeth Humphreys from ESO in Chile highlighted that ALMA and APEX, located in the country\u2019s Atacama region, were crucial to enabling the team to probe \u201cboth the physics and chemistry in action\u201d in the gas cloud. She added:<\/p>\n<p dir=\"ltr\" style=\"padding-left: 40px;\"><em>\u201cThis stunning image of the circumstellar environment of HD101584 would not have been possible without the exquisite sensitivity and angular resolution provided by ALMA.\u201d<\/em><\/p>\n<p dir=\"ltr\">While current telescopes allow astronomers to study the gas around the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Binary_star\">binary<\/a>, the two stars at the centre of the complex nebula are too close together and too far away to be resolved. ESO\u2019s Extremely Large Telescope, under construction in Chile\u2019s Atacama Desert,<\/p>\n<p dir=\"ltr\" style=\"padding-left: 40px;\"><em>\u201cwill provide information on the \u2018heart\u2019 of the object,\u201d<\/em><\/p>\n<p dir=\"ltr\">says Olofsson, allowing astronomers a closer look at the fighting pair.<\/p>\n<p><strong>Links<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.eso.org\/public\/archives\/releases\/sciencepapers\/eso2002\/eso2002a.pdf\">Research paper<\/a><\/li>\n<li><a href=\"https:\/\/www.eso.org\/public\/images\/archive\/search\/?adv=&amp;subject_name=Atacama%20Large%20Millimeter\/submillimeter%20Array\">Photos of ALMA<\/a><\/li>\n<\/ul>\n<p style=\"text-align: center;\"><em>===<\/em><strong><em> Amazon Ad <\/em><\/strong><em>===<\/em><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.amazon.com\/gp\/product\/1588346641\/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1588346641&amp;linkCode=as2&amp;tag=hobbyspace&amp;linkId=156a819766f963a2c908a54630a5ccfb\" target=\"_blank\" rel=\"noopener noreferrer\">Imagined Life: A Speculative Scientific Journey among the Exoplanets<br \/>\nin Search of Intelligent Aliens, Ice Creatures, and Supergravity Animals<\/a><img loading=\"lazy\" decoding=\"async\" style=\"border: none !important; margin: 0px !important;\" src=\"\/\/ir-na.amazon-adsystem.com\/e\/ir?t=hobbyspace&amp;l=am2&amp;o=1&amp;a=1588346641\" alt=\"\" width=\"1\" height=\"1\" border=\"0\" \/><\/p>\n<p style=\"text-align: center;\"><iframe style=\"width: 120px; height: 240px;\" src=\"\/\/ws-na.amazon-adsystem.com\/widgets\/q?ServiceVersion=20070822&amp;OneJS=1&amp;Operation=GetAdHtml&amp;MarketPlace=US&amp;source=ac&amp;ref=tf_til&amp;ad_type=product_link&amp;tracking_id=hobbyspace&amp;marketplace=amazon&amp;region=US&amp;placement=1588346641&amp;asins=1588346641&amp;linkId=de9745f08d6a5f6d3c25ce0702be3f3a&amp;show_border=true&amp;link_opens_in_new_window=true&amp;price_color=333333&amp;title_color=0066c0&amp;bg_color=ffffff\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The latest report from the European Southern Observatory (ESO): ALMA catches beautiful outcome of stellar fight Astronomers using the Atacama Large Millimeter\/submillimeter Array (ALMA), in which ESO is a partner, have spotted a peculiar gas cloud that resulted from a confrontation between two stars. One star grew so large it engulfed the other which, in &hellip; <a href=\"https:\/\/hobbyspace.com\/Blog\/?p=21067\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">ESO: ALMA spots red giant engulfing companion star<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[12],"tags":[],"class_list":["post-21067","post","type-post","status-publish","format-standard","hentry","category-astronomy"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-5tN","jetpack-related-posts":[{"id":9121,"url":"https:\/\/hobbyspace.com\/Blog\/?p=9121","url_meta":{"origin":21067,"position":0},"title":"ESO: Planet-forming mass-flow process seen in binary star system","author":"TopSpacer","date":"October 29, 2014","format":false,"excerpt":"The latest finding from the European Southern Observatory (ESO): Planet-forming Lifeline Discovered in a Binary Star System ALMA Examines Ezekiel-like \u201cWheel in a Wheel\u201d of Dust and Gas For the first time, researchers using ALMA have detected a streamer of gas flowing from a massive outer disc toward the inner\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"Artist\u2019s impression of the double-star system GG Tauri-A","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2014\/10\/eso1434a-1024x640.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":24144,"url":"https:\/\/hobbyspace.com\/Blog\/?p=24144","url_meta":{"origin":21067,"position":1},"title":"ESO: Galactic star formation seen vividly in VLT\/ALMA images","author":"TopSpacer","date":"July 16, 2021","format":false,"excerpt":"A new report from the European Southern Observatory (ESO): Galactic fireworks: new ESO images reveal stunning features of nearby galaxies A team of astronomers has released new observations of nearby galaxies that resemble colourful cosmic fireworks. 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