On the Origins, Remnant, and Multimessenger Prospects of the Compact Binary Merger GW230529
Year: 2024
Type: article
Abstract: This study investigates the origins of GW230529, delving into its formation from massive stars within isolated binary systems. Utilizing population-synthesis models, we present compelling evidence that the neutron star component forms second. However, the event’s low signal-to-noise ratio introduces complexities in identifying the underlying physical mechanisms driving its formation. Augmenting our analysis with insights from numerical relativity, we estimate the final black hole mass and spin to be approximately 5.3 M ⊙ and 0.53, respectively. Furthermore, we employ the obtained posterior samples to calculate the ejecta mass and kilonova light curves resulting from r-process nucleosynthesis. We find the ejecta mass to be within 0–0.06 M ⊙, contingent on the neutron star equation of state. The peak brightness of the kilonova light curves indicates that targeted follow-up observations with a Rubin-like observatory may have detected this emission.
Source: The Astrophysical Journal
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Funders: National Science Foundation, Aspen Center for Physics, National Research Foundation, Ministry of Education, Culture, Sports, Science and Technology, Academia Sinica, Centre National de la Recherche Scientifique, Istituto Nazionale di Fisica Nucleare, Ministry of Science and ICT, South Korea, National Science and Technology Council, Science and Technology Facilities Council, European Research Council, Japan Society for the Promotion of Science
Awards: Collaborative Research: Understanding Compact Binary Formation With Gravitational Wave Observations, G3346177474, G4610384425, Exploring the Gravitational-wave Universe, Network for Neutrinos, Nuclear Astrophysics, and Symmetries, Launching the Cosmic Explorer Conceptual Design, Collaborative Research: Testing General Relativity with Gravitational-Wave Observations, Collaborative Research: A Data Challenge for the Next Generation of Ground-Based Gravitational Wave Detectors
OpenAlex ID: W4405258689