PIRSA:23020029

Hypermassive neutron stars: from numerical relativity simulations to gamma-ray data

APA

Chirenti, C. (2023). Hypermassive neutron stars: from numerical relativity simulations to gamma-ray data. Perimeter Institute. https://pirsa.org/23020029

MLA

Chirenti, Cecilia. Hypermassive neutron stars: from numerical relativity simulations to gamma-ray data. Perimeter Institute, Mar. 09, 2023, https://pirsa.org/23020029

BibTex

          @misc{ pirsa_PIRSA:23020029,
            doi = {10.48660/23020029},
            url = {https://pirsa.org/23020029},
            author = {Chirenti, Cecilia},
            keywords = {Strong Gravity},
            language = {en},
            title = {Hypermassive neutron stars: from numerical relativity simulations to gamma-ray data},
            publisher = {Perimeter Institute},
            year = {2023},
            month = {mar},
            note = {PIRSA:23020029 see, \url{https://pirsa.org}}
          }
          

Cecilia Chirenti Universidade Federal do ABC

Collection
Talk Type Scientific Series
Subject

Abstract

Gamma ray bursts (GRBs) are the most luminous electromagnetic events in the universe. Short GRBs, typically lasting less than 2 seconds, have already been associated with binary neutron star (BNS) mergers, which are also sources of gravitational waves (GWs). The ultimate fate of a BNS, after coalescence, is usually expected to be a black hole (BH) with 2-3 solar masses. However, numerical relativity simulations indicate the possible formation of a short-lived hypermassive neutron star (HMNS), lasting for tens to hundreds of milliseconds after the BNS merger and before gravitational collapse forms a BH. The HMNS is expected to emit GWs with kHz frequencies that will be detectable by third generation ground-based GW detectors in the 2030s. I will present results from a recent analysis that revealed evidence for HMNSs by looking for kHz quasiperiodic oscillations in gamma-ray observations obtained in the 1990s with the Compton Gamma Ray Observatory.

Zoom link:  https://pitp.zoom.us/j/96687956901?pwd=MkgrUGlqY3IyRCs2bXJYVkhUVEpPZz09