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High-mass X-ray Binaries in Milky Way/Andromeda-like Galaxies

2024; Société royale des sciences de Liège; Linguagem: Inglês

10.25518/0037-9565.12401

1783-5720

F. Vivanco Cádiz, M. Celeste Artale, N. Masetti, Gastón Escobar, Giuliano Iorio,

Gamma-ray bursts and supernovae

High-Mass X-ray Binaries (HMXBs) are important for the study of the evolution of massive stars, the formation of compact objects such as black holes (BH) and neutron stars (NS), and the binary evolution processes that govern these systems. Moreover, HMXBs are crucial for understanding the accretion processes responsible for X-ray emission and are also potential progenitors of gravitational wave (GW) sources. In this study, we explore the population of HMXBs within simulated MW/M31-like galaxies by employing the IllustrisTNG50 hydrodynamical simulation in combination with the SEVN population synthesis code. We populate these galaxies with HMXBs by selecting stellar particles based on spatial location, metallicity, and age, accounting for the effects of varying metallicities and binary evolution processes. Our results indicate that the number and luminosity of HMXBs are significantly influenced by metallicity, confirming previous findings. Furthermore, we reproduce the expected slopes of the X-ray luminosity function (XLF), as well as the orbital parameters and masses of these systems, finding that the power-law slope α of the XLF is within the observed range and consistent with Galactic observational data.