{"id":85269,"date":"2024-07-01T16:06:34","date_gmt":"2024-07-01T16:06:34","guid":{"rendered":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/07\/01\/a-stellar-explosion-may-create-a-temporary-new-star-this-summer\/"},"modified":"2024-07-01T16:06:34","modified_gmt":"2024-07-01T16:06:34","slug":"a-stellar-explosion-may-create-a-temporary-new-star-this-summer","status":"publish","type":"post","link":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/07\/01\/a-stellar-explosion-may-create-a-temporary-new-star-this-summer\/","title":{"rendered":"A stellar explosion may create a temporary \u2018new star\u2019 this summer"},"content":{"rendered":"<div style=\"text-align:center\"><\/div> \r\n<br><div data-component=\"video-embed\">\n\t\t\t\t\n\n\n\n\n<p>Keep your eyes on the night sky this summer, scanning for the constellation Corona Borealis, and if you are lucky, you may glimpse what appears to be a new star winking on in the dark.<\/p>\n\n\n\n<p>The brightening point of light will not be a new star, but a nova eruption about 3,000 light-years from Earth. There, a white dwarf star orbiting a red giant tears material from its larger companion. When enough mass collects on the white dwarf\u2019s surface, the rising pressure and temperature will trigger a blast that can be seen from Earth with the naked eye \u2014 but for only a few days to a week.<\/p>\n\n\n<aside class=\"sn-conversion rich-text rich-text--with-sidebar\">\n<style><![CDATA[\n.email-conversion {\n  border: 1px solid #ffcccb;\n  color: white;\n  margin-top: 50px;\n  background-image: url(\"\/wp-content\/themes\/sciencenews\/client\/src\/images\/cta-module@2x.jpg\");\n  padding: 20px;\n  clear: both;\n}\n\n]]><\/style>\n\n\n\n                        <style class=\"is-layout-flow 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none;\n}\n\nform.zephr-form-content {\n    opacity: .9;\n}\n\nlabel.zephr-form-checkbox-label {\n    font-size: 1.2rem;\n    font-weight: bolder;\n}\n\n.zephr-form-custom-text > h4 {\n    color: black !important;\n}\n\nbutton.zephr-form-button {\n    background: #d4441f !important;\n    font-weight: bold !important;\n    text-transform: uppercase !important;\n}\n\nlabel.zephr-payment-form-checkbox-label {\n    color: white;\n    font-size: 1.6rem;\n}\n\n.zephr-form-content {\n    background:#2f537f;\n    \n}\n\n.zephr-payment-form-custom-text {\n    margin-top: .2rem;\n}\n\n.zephr-payment-form-checkbox-label {\n    display: flex;\n    align-items: center;\n    font-family: var(--zephr-typography-body-font), var(--zephr-typography-body-fallbackFont);\n    color: white;\n    font-weight: bold;\n}]]><\/style>\n                        \n                        \n<\/aside>\n\n\n<p>\u201cThis is a once-in-a-lifetime opportunity,\u201d says Gerardo Juan Manuel Luna, an astronomer at the Universidad Nacional De Hurlingham in Argentina. \u201cWe are in the right time, in the right moment, with the right instruments.\u201d<\/p>\n\n\n\n<p>The white dwarf and red giant constitute a binary system known as T Corona Borealis, or T CrB. Astronomers believe that the nova will occur anytime between now and September. T CrB repeats its eruption about every 80 years. The <a href=\"https:\/\/www.sciencenews.org\/archive\/science-fields-714\">last time this happened was in 1946<\/a> (<em>SN: 2\/23\/46<\/em>).<\/p>\n\n\n\n<p>Novas take their name from astronomer Tycho Brahe\u2019s 1573 report of a new object in the constellation Cassiopeia titled De Nova Stella, Latin for \u201cOn the New Star.\u201d Astronomers today know that these <em>nova stella<\/em> are in fact blasts from white dwarfs, the dense leftover cores of stars that have shed their outer layers. When a white dwarf siphons material from a nearby companion star, the accreted mass can <a href=\"https:\/\/www.sciencenews.org\/article\/number-milky-way-nova-explosions-per-year-pinned-down\">trigger a nova<\/a> (<em>SN: 2\/12\/21<\/em>).<\/p>\n\n\n\n<p>T CrB experienced a sudden brightening in recent years that astronomers call <a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-4357\/ab3c62\" target=\"_blank\" rel=\"noopener\">a \u201csuper active\u201d phase<\/a> followed by an apparent dip in activity, which signals <a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/2041-8213\/abbb2c\/pdf\" target=\"_blank\" rel=\"noopener\">the nova is probably imminent<\/a>. The same pattern was observed before T CrB burst in 1946 and 1866.<\/p>\n\n\n\n<div class=\"wp-block-sciencenews-content-sidebar\">\n<h3 class=\"wp-block-heading\">Here\u2019s where to look for the new star<\/h3>\n\n\n\n<p>The constellation Corona Borealis, which is Latin for \u201cNorthern Crown,\u201d consists of seven stars in an arc resembling the letter C (toward the left in this image). Positioned between the bright stars Vega and Arcturus, it is visible high overhead during summer evenings in the Northern Hemisphere while appearing close to the northern horizon in much of the Southern Hemisphere. To find the\u00a0Northern Crown, trace an arcing line from the handle of the Big Dipper to Arcturus (bright spot bottom right), and then look for the\u00a0semicircle of stars nearby to the east. The nova will appear just outside this semicircle.\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><figcaption><span class=\"credit wp-credit-3140827\">Alan Dyer\/Stocktrek Images\/Getty Images Plus<\/span><\/figcaption><\/figure>\n<\/div>\n\n\n\n<p>This time around, scientists plan to get a better view of the nearby nova than ever before. Dozens of telescopes around the world and orbiting in space, spanning the entire electromagnetic spectrum, will fix T CrB in their sights in an effort to unravel the mysteries of these cosmic blasts.<\/p>\n\n\n\n<p>\u201cWe hope to be able to answer questions with this object that then might be relevant to all the other accreting and eruptive white dwarfs,\u201d says Jennifer Sokoloski, an astrophysicist at Columbia University.<\/p>\n\n\n\n<p>One of the main questions is whether the white dwarf in T CrB gains or loses mass following each successive nova. The eruption will eject material into space, but some of the mass ripped from the red giant may sink into the white dwarf, causing the small but dense star to gain mass over time. If this is the case, then repeating novas such as this one might ultimately lead to even bigger explosions called type 1a supernovas, which play an important role in the evolution of star systems and entire galaxies.<\/p>\n\n\n\n\n\n<p>\u201cThat\u2019s the holy grail,\u201d Luna says. \u201cAfter the eruption, say in the next five years when things are calmed down, we should be able to measure the mass again and see what happened.\u201d<\/p>\n\n\n\n<p>Additional unsolved mysteries include how shock waves from the nova will propagate through a nebula of gas surrounding the red giant and whether dust will form in this extreme environment \u2014 a key part of understanding where the dust that forms stars and planets comes from, Luna says. Astronomers will also be on <a href=\"https:\/\/www.sciencenews.org\/article\/high-energy-radiation-stellar-explosions-explained\">the lookout for high-energy gamma rays<\/a>, which were <a href=\"https:\/\/www.science.org\/doi\/10.1126\/science.1192537\" target=\"_blank\" rel=\"noopener\">first detected from a nova in the binary system V407 Cygni in 2010<\/a> (<em>SN: 10\/8\/14<\/em>).<\/p>\n\n\n\n<p>\u201cThat was a complete shock,\u201d says Justin Linford, an astrophysicist at the National Radio Astronomy Observatory in Socorro, N.M. \u201cNobody in the nova community thought these things had enough energy to reach gamma ray levels.\u201d<\/p>\n\n\n\n<p>There will be little warning before the eruption of T CrB \u2014 and scientists can\u2019t be completely sure that it will even happen in the coming months. \u201cMaybe we\u2019ll sit here holding our breath for the next 10 years,\u201d Sokoloski says.<\/p>\n\n\n\n<p>But if T CrB\u2019s past behavior repeats itself, then those who find a dark place to view Corona Borealis at the right moment could be the first to see this cosmic spectacle burst to life.<\/p>\n\n\n\n<p>\u201cMy bet,\u201d Luna says, \u201cis that this event is going to be detected by amateurs first.\u201d<\/p>\n\n\n\n\t\t\t<\/div>\r\n<br>\r\n<br><a href=\"https:\/\/www.sciencenews.org\/article\/stellar-explosion-nova-new-star-summer\">Source link <\/a>","protected":false},"excerpt":{"rendered":"<p>Keep your eyes on the night sky this summer, scanning for the constellation Corona Borealis, and if you are lucky, you may glimpse what appears to be a new star winking on in the dark. The brightening point of light will not be a new star, but a nova eruption about 3,000 light-years from Earth. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":85270,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","fifu_image_url":"https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/06\/062124_jb_nova_inline.jpg?resize=675%2C450&ssl=1","fifu_image_alt":"","footnotes":""},"categories":[606],"tags":[3816,171,964,24136,8971,11840],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/85269"}],"collection":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/comments?post=85269"}],"version-history":[{"count":1,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/85269\/revisions"}],"predecessor-version":[{"id":85271,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/85269\/revisions\/85271"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media\/85270"}],"wp:attachment":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media?parent=85269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/categories?post=85269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/tags?post=85269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}