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: Valentina Cesare email: vcesare@unito.it ciclo: XXXIII year completed (1,2 or 3): 3 supervisor: Antonaldo Diaferio ------------------------------------------- GRADUATE SCHOOL COURSES (only completed courses, with examination passed in the year) code: 10 title: Big Data Science and Machine Learning teacher: Federica Legger hours: 10 code: 11 title: Introduction to Parallel Programming with MPI teacher: Andrea Mignone hours: 12 ------------------------------------------- UNDERGRADUATE COURSES (Laurea Magistrale) (only completed courses, with examination passed in the year) title: Sistemi di Calcolo Distribuiti e Paralleli teacher: Marco Aldinucci hours: 48 ------------------------------------------- SUMMER SCHOOLS, INTERNATIONAL SCHOOLS (only those attended in the current year) title: Introduction to Python Programming place: Roma (Italy) webpage: https://eventi.cineca.it/en/hpc/introduction-python-programming/roma-20191001 days: October 1 – 3, 2019 talk or poster (Y/N): N ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: 28th Euromicro International Conference on Parallel, Distributed and Network-Based Processing (PDP 2020) place: Västerås, Sweden (turned in a virtual conference due to the sanitary emergency) webpage: http://www.pdp2020.com days: March 11 – 13, 2020 talk (Y/N): Y poster (Y/N): N title: Cosmology from Home 2020 place: virtual conference webpage: https://www.cosmologyfromhome.com days: August 24 – September 4, 2020 talk (Y/N): Y poster (Y/N): N --------------------------------------------------- Research activity/Publications in the current year (max characters 2500) I investigated the dynamics of 30 DiskMass Survey (DMS, Martinsson et al. 2013) galaxies in Refracted Gravity (RG), a novel modified gravity theory inspired to electrodynamics in matter, not resorting to dark matter (Matsakos & Diaferio 2016). RG properly models the kinematic profiles of these galaxies with mass-to-light ratios consistent with stellar population synthesis models, disk scale heights in agreement with observations, and the three RG parameters from different galaxies consistent between each other, suggesting their universality. As expected, RG models the dynamics of the entire sample with a unique combination of RG parameters, consistent within 2 sigma with those found for individual galaxies. To model all the galaxies at the same time, I wrote a parallel code with OpenMP, that is publicly available on GitHub (https://github.com/alpha-unito/astroMP) and described in Cesare et al. (2020a). RG also reproduces the radial acceleration relation (McGaugh et al. 2016) of DMS galaxies, albeit with a too large intrinsic scatter and with residuals correlating with some galaxy properties, apparently at odds with observations (Lelli et al. 2017). Further study is required to assess if this issue is due to the sample or to a failure of RG. These results are presented in a paper published in A&A (Cesare et al 2020b). I also collaborated to a review about the small scale problems of CDM model (de Martino et al. 2020). At last, I started two new projects. The former, in preparation for A&A, consists in further testing RG with the dynamics of three E0 galaxies in the SLUGGS survey (Pota et al. 2013). Preliminary results might support RG. The latter, in preparation for the Journal of Parallel and Distributed Computing, extends the work of Cesare et al. (2020a). Bibliography: 1) Cesare V., Colonnelli I., & Aldinucci M., 2020a, in Proc. of 28th Euromicro Intl. Conference on Parallel, Distributed and Network-Based Processing (PDP) (Västerås, Sweden: IEEE), 376-384 2) Cesare V., Diaferio A., Matsakos T., & Angus G., 2020b, A&A, 637, A70 3) de Martino I., Chakrabarty S. S., Cesare V., Gallo A., Ostorero L., & Diaferio A., 2020, Universe, 6, 107 4) Lelli F., McGaugh S. S., et al., 2017, ApJ, 836, 152 5) Martinsson T. P. K., Verheijen M. A. W., et al., 2013, A&A, 557, A130 6) Matsakos T., & Diaferio A., 2016, arXiv:1603.04943 7) McGaugh S. S., Lelli F., & Schombert J. M., 2016, Phys. Rev. Lett., 117, 201101 8) Pota V., Forbes D. A., et al., 2013, MNRAS, 428, 389 BE AWARE: visits and stages,research activity and pubs are not evaluated as didactic credits, but are requested to trace the PhD students' career