{"id":144,"date":"2011-12-01T15:46:05","date_gmt":"2011-12-01T15:46:05","guid":{"rendered":"https:\/\/araucaria.camk.edu.pl\/?p=144"},"modified":"2021-10-04T16:01:07","modified_gmt":"2021-10-04T16:01:07","slug":"dynamical-mass-of-a-cepheid-again","status":"publish","type":"post","link":"https:\/\/araucaria.camk.edu.pl\/index.php\/2011\/12\/01\/dynamical-mass-of-a-cepheid-again\/","title":{"rendered":"Dynamical mass of a Cepheid again"},"content":{"rendered":"\n

Very precise mass determination of the Cepheid OGLE-LMC-CEP-1812 in an eclipsing binary system.<\/p>\n\n\n\n

\n\n\n\n

The Araucaria Project: Accurate Determination of the Dynamical Mass of the Classical Cepheid in the Eclipsing System OGLE-LMC-CEP-1812<\/h3>\n\n\n\n

G. Pietrzy\u0144ski, I. Thompson, D. Graczyk, W. Gieren, B. Pilecki, A. Udalski, I. Soszynski, G. Bono, P. Konorski, N. Nardetto, J. Storm<\/em><\/p>\n\n\n\n

2011, ApJ, 742, L20<\/a><\/p>\n\n\n\n

\"\"
Radial velocity curve of the system OGLE-LM-CEP-1812<\/figcaption><\/figure><\/div>\n\n\n\n

After the first dynamical mass determination of the Cepheid in eclipsing binary OGLE-LMC-CEP-0227<\/a>, the second successful mass determination has been made. An eclipsing binary system OGLE-LMC-CEP-1812 consists of a classical fundamental mode Cepheid pulsating with a period of 1.31 days and a mass of 3.74 \u00b1 0.06 M\u2609<\/sub>, and a stable giant with a mass of 2.64 \u00b1 0.04 M\u2609<\/sub>. The dynamical masses for both stars were derived with an accuracy of 1.5% and agree very well with that predicted by pulsation models. This new, very accurate dynamical mass for a classical Cepheid will greatly contribute to the solution of the Cepheid mass discrepancy problem, and to our understanding of the structure and evolution of classical Cepheids.<\/p>\n","protected":false},"excerpt":{"rendered":"

Very precise mass determination of the Cepheid OGLE-LMC-CEP-1812 in an eclipsing binary system.<\/p>\n","protected":false},"author":1,"featured_media":145,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[13,11,12,19],"class_list":["post-144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-highlights","tag-binary","tag-cepheid","tag-eclipsing","tag-lmc"],"_links":{"self":[{"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/posts\/144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/comments?post=144"}],"version-history":[{"count":3,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/posts\/144\/revisions"}],"predecessor-version":[{"id":1962,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/posts\/144\/revisions\/1962"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/media\/145"}],"wp:attachment":[{"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/media?parent=144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/categories?post=144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/araucaria.camk.edu.pl\/index.php\/wp-json\/wp\/v2\/tags?post=144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}