Graduate School in Physics and Astrophysics ------------------------------------------- ANNUAL REPORT ------------------------------------------- Fill with a text editor (without TAB or formatting) Repeat fields for each course as necessary. ------------------------------------------- name: Piero Rettegno email: piero.rettegno@unito.it ciclo: XXXIV year completed (1,2 or 3): 1 supervisor: Nicolao Fornengo, Alessandro Nagar ------------------------------------------- GRADUATE SCHOOL COURSES (only completed courses, with examination passed in the year) code: T 02 title: Introduction to large-N limit teacher: Marco Panero hours: 20 code: T 05 title: Standard Model Effective Field Theory and its applications in Flavour Physics teacher: Martin Jung hours: 20 ------------------------------------------- COURSES FROM OTHER GRADUATE SCHOOLS (only completed courses, with examination passed in the year) school: Università degli Studi di Torino title: Health and Safety in the workplace training course teacher: Online course hours: 4 ------------------------------------------- SUMMER SCHOOLS, INTERNATIONAL SCHOOLS (only those attended in the current year) title: Theoretical Aspects of Astroparticle Physics, Cosmology and Gravitation place: Galileo Galilei Institute for Theoretical Physics, Arcetri (Italy) webpage: https://agenda.infn.it/event/17246/ days: 10 talk or poster (Y/N): N ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: First European Physical Society Conference on Gravitation place: Università degli Studi di Roma "La Sapienza", Roma (Italy) webpage: https://agenda.infn.it/event/15395/ days: 3 talk (Y/N): N poster (Y/N): Y title: LISA Waveform working group place: Max Planck Institute for Gravitational Physics, Potsdam (Germany) webpage: https://workshops.aei.mpg.de/lisawavwg/ days: 3 talk (Y/N): N poster (Y/N): N title: Physics & Astrophysics at the Extreme place: European Gravitational Observatory, Cascina (Italy) webpage: https://indico.ego-gw.it/event/23/ days: 3 talk (Y/N): N poster (Y/N): N ------------------------------------------- VISITS AND STAGES (only those done in the current year ) institution: Institut des Hautes E'tudes Scientifiques place: Bures-sur-Yvette (France) starting date: 27 January, 2019 days: 14 --------------------------------------------------- Research activity/Publications in the current year (max characters 2500) Thanks to the LIGO and Virgo interferometers, we are currently able to detect gravitational waves produced by compact binary systems, i.e. composed of either black holes or neutron stars. In order to correctly analyse these signals, very fast and accurate waveform models are needed. My work focuses on the modelization of gravitational waves through the effective-one-body (EOB) approach to the binary dynamics. During my first PhD year I continued the work I started with my master's thesis, contributing to the implementation of the semi-analytical model TEOBResumS [1]. I developed a faster way of computing the EOB dynamics that makes use of the post-adiabatic (PA) approximation [2], which neglects the need of surrogate models for parameter estimation purposes. Finally, I gave some contribution to two works that improved the self-spin terms [3] and the tidal gravitational potential [4] include within TEOBResumS. In the last period, I began to study the analytical differences between the two state-of-the-art EOB-based models and generalized the PA approximation so that it can be used in any of them. In parallel, I had to carry out some jobs for the LIGO-Virgo Collaboration. I was assigned the role of reviewer for the LIGO Advanced Library implementation of TEOBResumS and I was part of the rotating group of people following the analysis and parameter estimation of gravitational wave events. [1] A. Nagar et al., "Time-domain effective-one-body gravitational waveforms for coalescing compact binaries with nonprecessing spins, tides and self-spin effects", Phys. Rev. D 98 (2018) no.10, 104052. [2] A. Nagar and P. Rettegno, "Efficient effective one body time-domain gravitational waveforms", Phys. Rev. D 99 (2019) no.2, 021501 (submitted to arXiv before the starting date of the PhD, published after). [3] A. Nagar et al.,"Nonlinear-in-spin effects in effective-one-body waveform models of spin-aligned, inspiralling, neutron star binaries", Phys. Rev. D 99 (2019) no.4, 044007. [4] S. Akcay et al., "Effective-one-body multipolar waveform for tidally interacting binary neutron stars up to merger", Phys. Rev. D 99 (2019) no.4, 044051. BE AWARE: visits and stages,research activity and pubs are not evaluated as didactic credits, but are requested to trace the PhD students' career