<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Dear all, </div><div class=""><br class=""></div><div class="">on Thursday 19th of April at <b class="">13:15 (slightly later to avoid conflict with another meeting) </b>we will have our next EO meeting,</div><div class=""> in the usual KTH meeting room on the 5th floor.</div><div class=""><br class=""></div><div class="">The speaker is Irvin Martinez Rodriguez, who is visiting in Stockholm. Below, title and abstract of his talk.</div><div class=""><br class=""></div><div class="">cheers</div><div class=""><br class=""></div><div class="">/Francesco</div><div class=""><br class=""></div><div class="">%%%%%%%%%%%%%%%%%%</div><div class=""><br class=""></div><div class="">Title: </div><div class="">Towards the binary compact object formation as an effective field theory<br class=""><br class=""></div><div class="">Abstract: </div><div class="">To solve the dynamics of a pair of heavy and compact objects through the exchange of gravitational degrees of freedom and emitting gravitational waves we can set the problem in an effective field theory framework, in the non relativistic general relativity formulation known as effective field theory for extended objects. The two-body problem exhibits a clear separation of scales: The size of the compact objects, the orbital separation and the gravitational wavelength, all controlled by the same expansion parameter. This approach is a way of organizing systemastic expansions in powers of ratios of scales. We describe how to "integrate out" physics at each of the scales to obtain a theory with well defined rules for calculating observables. A possible extension of this idea to formulate the compact object formation in this framework is discussed.</div><div class=""><br class=""></div></body></html>