Cosmology with standard sirens

• Grant number: 22/13943-0
• Support Opportunities: Regular Research Grants
• Duration: March 01, 2023 - February 28, 2025
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
• Convênio/Acordo: Universidad de Antioquia (UdeA)
• Mobility Program: SPRINT - Projetos de pesquisa - Mobilidade
• Principal Investigator: Riccardo Sturani
• Grantee: Riccardo Sturani
• Principal researcher abroad: Antonio Enea Romano
• Institution abroad: Universidad de Antioquia (UdeA), Colombia
• Host Institution: Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil
• Associated research grant: 22/06350-2 - Fundamental physics and LIGO, AP.ESP

Abstract

Gravitational waves are propagating ripples in space-time geometry, pro-duced by the accelerated motion of massive astrophysical objects or by cos-mological sources, and they have been first observed by the Advanced LaserInterferometer Gravitational Observatory (LIGO) in September 2015, whenthe signal from coalescing black holes have been detected, confirming thepredictions of General Relativity (GR). Since then, during the observationrun 1, 2 and 3 which spanned overall about 2 years, a grand total of 90binary merger events have been detected, including one spectacular eventinvolving two merging neutron stars, which have also triggered detectionin all of the electro-magnetic spectrum. The next observation run O4 isplanned to start in the middle of the year 2023 and should be lasting morethan one year.The University of Antioquia is a member of the LIGO Scientific Collab-oration (LSC) through the group of Prof. Romano, and this project willdevelop within with the Cosmology sub-group of the LSC Compact BinaryCoalescence (CBC) group. Within the field of gravitational wave physics,we aim at exploiting compact binary coalescences as standard sirens, whichcan provide measurements of luminosity distance independent from electro-magnetic observations, enabling to reconstruct the cosmic expansion historyof the Universe at moderate redshift (z r 2). (AU)