{"id":7359,"date":"2018-04-23T12:18:54","date_gmt":"2018-04-23T16:18:54","guid":{"rendered":"https:\/\/www.bu.edu\/astronomy\/?p=7359"},"modified":"2018-04-25T15:25:59","modified_gmt":"2018-04-25T19:25:59","slug":"423-lee-what-can-modeling-chemical-abundance-ratio-distributions-in-dwarf-galaxies-tell-us","status":"publish","type":"post","link":"https:\/\/www.bu.edu\/astronomy\/2018\/04\/23\/423-lee-what-can-modeling-chemical-abundance-ratio-distributions-in-dwarf-galaxies-tell-us\/","title":{"rendered":"4\/23 Lee: What Can Modeling Chemical Abundance Ratio Distributions in Dwarf Galaxies Tell Us?"},"content":{"rendered":"<p><strong>Astrophysics Seminar<\/strong><br \/>\n<em>Monday, April 23, 2018<\/em><br \/>\n<em>3:30pm, CAS 502<\/em><\/p>\n<p>What Can Modeling Chemical Abundance Ratio Distributions in Dwarf Galaxies Tell Us?<\/p>\n<p><strong>Duane Lee<\/strong><br \/>\n<em>MIT Kavli Institute<\/em><\/p>\n<p><strong>Abstract<\/strong>: The chemical abundances found in stars convey a wealth of information on stellar evolution from stellar nucleosynthesis (e.g., stellar core burning, AGB phase burning, explosive supernova phase fusion, etc.) to stellar remnant explosive nucleosynthesis (e.g., white dwarf and neutron star mergers). Their chemical abundances also convey information on their likely galactic origins, i.e., are they formed in the bulge\/disk of the Milky Way (in situ) or are they originally from an accreted dwarf galaxy or major merger (ex situ)? To make use of the information stellar chemical abundances provide I have constructed semi\u2010analytic models of the chemical abundance ratio distributions (CARDs) found in ultra\u2010faint dwarf (UFD) galaxies (Lee et al. 2013) to better constrain the relative contributions to r\u2010process element enrichment (e.g., Barium, Europium, etc.) from core\u2010collapse supernova and neutron star mergers (Lee &#038; Frebel 2018 [in prep]). These CARDs can also provide useful information for reconstructing the accretion history of Galaxy (Lee et al. 2015). In my talk, I will explain how these CARD models and statistical analysis methods can be used to gain better insights into the origins of the Galactic halo, origins of individual r\u2010process enhanced stars in the UFDs and the origin of r\u2010process elements themselves.<\/p>\n<p>\n<em><a href=\"http:\/\/www.bu.edu\/iar\/seminars\/current-seminars\/\">IAR Seminar Schedule<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Astrophysics Seminar Monday, April 23, 2018 3:30pm, CAS 502 What Can Modeling Chemical Abundance Ratio Distributions in Dwarf Galaxies Tell Us? Duane Lee MIT Kavli Institute Abstract: The chemical abundances found in stars convey a wealth of information on stellar evolution from stellar nucleosynthesis (e.g., stellar core burning, AGB phase burning, explosive supernova phase fusion, [&hellip;]<\/p>\n","protected":false},"author":14537,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1939],"tags":[],"_links":{"self":[{"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/posts\/7359"}],"collection":[{"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/users\/14537"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/comments?post=7359"}],"version-history":[{"count":1,"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/posts\/7359\/revisions"}],"predecessor-version":[{"id":7360,"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/posts\/7359\/revisions\/7360"}],"wp:attachment":[{"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/media?parent=7359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/categories?post=7359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bu.edu\/astronomy\/wp-json\/wp\/v2\/tags?post=7359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}