{"id":10836,"date":"2023-12-26T22:00:00","date_gmt":"2023-12-26T22:00:00","guid":{"rendered":"https:\/\/modernsciences.org\/staging\/4414\/?p=10836"},"modified":"2023-12-07T16:31:22","modified_gmt":"2023-12-07T16:31:22","slug":"astronomers-discover-four-new-eruptive-young-stellar-objects","status":"publish","type":"post","link":"https:\/\/modernsciences.org\/staging\/4414\/astronomers-discover-four-new-eruptive-young-stellar-objects\/","title":{"rendered":"Astronomers Discover Four New Eruptive Young Stellar Objects"},"content":{"rendered":"\n<div class=\"wp-block-group has-gray-200-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h1 id=\"at-a-glance\" class=\"wp-block-heading\">At a Glance<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">An international team of astronomers has discovered four new eruptive young stellar objects (YSOs) by analyzing data from the SPICY catalog and NASA\u2019s WISE spacecraft.<\/li>\n\n\n\n<li class=\"\">YSOs are stars in the early stages of evolution, and they undergo accretion-driven outbursts known as EX Lup and FU Ori outbursts.<\/li>\n\n\n\n<li class=\"\">The researchers identified four eruptive YSOs, including two bona fide FUors and one candidate FUor with an ongoing outburst.<\/li>\n\n\n\n<li class=\"\">All four newly discovered YSOs exhibit long-term, high-amplitude outbursts and display strong 12CO emission lines in their spectra.<\/li>\n\n\n\n<li class=\"\">The study provides valuable insights into the accretion processes of YSOs and highlights the need for continued monitoring and follow-up observations of these objects.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img  loading=\"lazy\"  decoding=\"async\"  width=\"1068\"  height=\"879\"  src=\"https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-80x66.png\"  alt=\"\"  class=\"wp-image-10837 pk-lqip pk-lazyload\"  data-pk-sizes=\"auto\"  data-ls-sizes=\"auto, (max-width: 1068px) 100vw, 1068px\"  data-pk-src=\"https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o.png\"  data-pk-srcset=\"https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o.png 1068w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-380x313.png 380w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-800x658.png 800w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-80x66.png 80w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-760x626.png 760w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-600x494.png 600w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-300x247.png 300w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-768x632.png 768w, https:\/\/modernsciences.org\/staging\/4414\/wp-content\/uploads\/2023\/12\/48507562636_40818a7254_o-1024x843.png 1024w\" ><figcaption class=\"wp-element-caption\">&#8220;<a href=\"https:\/\/www.flickr.com\/photos\/54209675@N00\/48507562636\" target=\"_blank\" rel=\"noreferrer noopener\">Young Stellar Object in LDN 1471<\/a>&#8221; by\u00a0<a href=\"https:\/\/www.flickr.com\/photos\/54209675@N00\" target=\"_blank\" rel=\"noreferrer noopener\">geckzilla<\/a>\u00a0is licensed under\u00a0<a href=\"https:\/\/creativecommons.org\/licenses\/by\/2.0\/?ref=openverse\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY 2.0<\/a>.<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"\">A team of international astronomers has made an exciting discovery by analyzing data from the <a href=\"https:\/\/irsa.ipac.caltech.edu\/data\/SPITZER\/SPICY\/overview.html\" target=\"_blank\" rel=\"noopener\" title=\"\">SPICY catalog<\/a> and <a href=\"https:\/\/www.nasa.gov\/\" target=\"_blank\" rel=\"noopener\" title=\"\">NASA<\/a>&#8216;s <a href=\"https:\/\/www.jpl.nasa.gov\/missions\/wide-field-infrared-survey-explorer-wise\" target=\"_blank\" rel=\"noopener\" title=\"\">WISE<\/a> spacecraft. They have identified four new eruptive <em>young stellar objects<\/em> (YSOs), stars in the early stages of evolution. The findings were published in the December issue of <a href=\"https:\/\/jkas.kas.org\/journal\/article.php?code=88006&amp;list.php\" target=\"_blank\" rel=\"noopener\" title=\"\"><em>the Journal of the Korean Astronomical Society<\/em><\/a>.<\/p>\n\n\n\n<p class=\"\">Young stellar objects (YSOs) are typically found within dense molecular clusters that contain molecular gas and interstellar particles. These objects, including protostars and pre-main sequence stars, undergo episodic accretion processes. This means they experience accretion-driven outbursts, which astronomers classify as <em>EX Lup<\/em> or <em>FU Ori<\/em> outbursts. EX Lup outbursts are smaller in magnitude and last from a few months to a couple of years, while FU Ori outbursts are more extreme, rare, and can last for decades or even centuries.<\/p>\n\n\n\n<p class=\"\">Given the rarity of eruptive young stellar objects and the limited number of known objects, a group of astronomers led by <a href=\"https:\/\/astron.snu.ac.kr\/en\/snu__professor\/carlos-eduardo-contreras-pena\/\" target=\"_blank\" rel=\"noopener\" title=\"\">Carlos Contreras Pe\u00f1a<\/a> from <a href=\"https:\/\/en.snu.ac.kr\/index.html\" target=\"_blank\" rel=\"noopener\" title=\"\">Seoul National University<\/a> searched for new outbursting YSOs. They examined data from the SPICY catalog and analyzed mid-infrared photometry from the WISE mission.<\/p>\n\n\n\n<p class=\"\">As a result of their investigation, the researchers identified four eruptive YSOs: SPICY 97855, SPICY 99341, SPICY 100587, and SPICY 109331. SPICY 99341 and SPICY 100587 were classified as bona fide FUors, while SPICY 97855 is a candidate FUor with an ongoing outburst. SPICY 109331, initially classified as an EXor, displayed a longer outburst duration than expected and was classified as a V1647 Ori-like source, exhibiting mixed characteristics between EXors and FUors.<\/p>\n\n\n\n<p class=\"\">The study revealed that all four newly discovered eruptive YSOs exhibit long-term, high-amplitude outbursts lasting more than a year and with magnitudes exceeding 2.5. Their spectra also display strong 12CO emission lines, indicating significant changes in the accretion rate.<\/p>\n\n\n\n<p class=\"\">The distance to SPICY 99341 and SPICY 109331 was determined to be approximately 9,800 and 12,500 light-years, respectively. However, further observations are required to determine the distance to the other two YSOs accurately.<\/p>\n\n\n\n<p class=\"\">This discovery of four new eruptive YSOs provides valuable insights into young stellar objects&#8217; accretion processes and behavior. Continued monitoring and follow-up observations of these objects will contribute to a better understanding of their accretion mechanisms.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 id=\"references\" class=\"wp-block-heading\">References<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">Contreras Pe\u00f1a, C., Ashraf, M., Lee, J.-E., Herczeg, G., Lucas, P., Guo, Z., Johnstone, D., Lee, H.-G., &amp; Jose, J. (2023). New Eruptive YSOs from SPICY and WISE. <em>Journal of The Korean Astronomical Society<\/em>, <em>56<\/em>(2), 253\u2013262. <a href=\"https:\/\/doi.org\/10.5303\/JKAS.2023.56.2.253\" target=\"_blank\" rel=\"noopener\" title=\"\">https:\/\/doi.org\/10.5303\/JKAS.2023.56.2.253<\/a><\/li>\n\n\n\n<li class=\"\">Nowakowski, T. &amp; Phys.org. (2023, December 7). <em>Four eruptive young stellar objects discovered<\/em>. Phys.Org; Phys.org. <a href=\"https:\/\/phys.org\/news\/2023-12-eruptive-young-stellar.html\" target=\"_blank\" rel=\"noopener\" title=\"\">https:\/\/phys.org\/news\/2023-12-eruptive-young-stellar.html<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"At a Glance A team of international astronomers has made an exciting discovery by analyzing data from the&hellip;\n","protected":false},"author":2,"featured_media":10819,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[14],"tags":[44,75],"class_list":{"0":"post-10836","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-space","8":"tag-nasa","9":"tag-star","10":"cs-entry","11":"cs-video-wrap"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/10836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/comments?post=10836"}],"version-history":[{"count":1,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/10836\/revisions"}],"predecessor-version":[{"id":10838,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/10836\/revisions\/10838"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media\/10819"}],"wp:attachment":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media?parent=10836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/categories?post=10836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/tags?post=10836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}