{"id":2830,"date":"2022-05-26T14:19:58","date_gmt":"2022-05-26T12:19:58","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/en\/?p=2830"},"modified":"2022-05-26T14:19:58","modified_gmt":"2022-05-26T12:19:58","slug":"spectroscopy-of-the-massive-interacting-binary-uu-cassiopeiae","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/en\/2022\/05\/26\/spectroscopy-of-the-massive-interacting-binary-uu-cassiopeiae\/","title":{"rendered":"Spectroscopy of the massive interacting binary UU Cassiopeiae"},"content":{"rendered":"\n<p><p style=\"text-align: justify;\">Revealing the true nature of multiple star systems can be difficult, especially when at least one of the components is hidden in a gas that is an integral part of the system. Petr Hadrava from ASU led an international team that contributed to the detail description of the <strong>UU Cas system<\/strong> configuration. Among other telescopes, also a set of spectra acquired with the <strong>Perk&#8217;s 2-meter telescope<\/strong> was used in this work.<\/p>\n\n\n\n<p><p style=\"text-align: justify;\">The object of interest was the optically indistinguishable binary star UU Cas in the constellation Cassiopeia. The star is relatively bright and provides a signal sufficient to obtain the accurate photometric and spectroscopic data needed to create a reliable binary star model. In the spectrum of this star, the spectral lines of only one component are clearly observable, but their Doppler shifts indicate an orbital movement around the other body. Because emission lines such as the Balmer series of hydrogen are also observed in the spectrum, it soon became clear that there was a large amount of gas in the system, probably in the form of an accretion disk, which is at least partially obscuring the second component. &#8230;<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"details-and-contacts\">Details and contacts<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>popular article at AI web page (M. \u0160vanda, in Czech): <a rel=\"noreferrer noopener\" href=\"https:\/\/www.asu.cas.cz\/articles\/1951\/19\/na-cem-pracujeme-zahalena-dvojhvezda-uu-cas\" target=\"_blank\">Na \u010dem pracujeme: Zahalen\u00e1 dvojhv\u011bzda UU Cas<\/a><\/li><li>P. Hadrava et al., <em>Spectroscopy of the massive interacting binary UU Cassiopeiae<\/em>, Astronomy &amp; Astrophysics, in press, preprint <a rel=\"noreferrer noopener\" href=\"https:\/\/arxiv.org\/abs\/2201.13275\" target=\"_blank\">arXiv:2201.13275<\/a><\/li><li><strong>Contact<\/strong>: doc. RNDr. Petr Hadrava, DrSc., petr.hadrava@asu.cas.cz<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Revealing the true nature of multiple star systems can be difficult, especially when at least one of the components is hidden in a gas that<\/p>\n","protected":false},"author":1,"featured_media":2833,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42,35],"tags":[],"class_list":["post-2830","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-department","category-news"],"_links":{"self":[{"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/posts\/2830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/comments?post=2830"}],"version-history":[{"count":2,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/posts\/2830\/revisions"}],"predecessor-version":[{"id":2835,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/posts\/2830\/revisions\/2835"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/media\/2833"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/media?parent=2830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/categories?post=2830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/en\/wp-json\/wp\/v2\/tags?post=2830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}