Constraints from Gamma-ray Burst Phenomenology on the Hypothesis of Quark Star as the central engines of Gamma-ray Bursts

Abstract

The existence of a strange quark star (QS) predicted in the Bodmer-Witten hypothesis has been a matter of debate. The combustion from a neutron star to a strange QS in its accreted process in a low-mass X-ray binary is proposed to be a scenario that generates gamma-ray bursts (GRBs); the baryon contamination of the outflow is very low and mainly from the masses of crusts ($M_{\mathrm{crust}}$) of QSs. A special subset of GRBs detected in the past 16 years are collected and used to estimate $M_{\mathrm{crust}}$ under this assumption of QSs as central engines. Correspondingly, $M_{\mathrm{crust}}$ is calculated in the frameworks of several models for cold dense quark matter (MIT bag model and Nambu-Jona-Lasino model with or without the impacts from the formation of color superconducting condensates being considered), for comparison with the observation. In conclusion, we find that the GRB samples have so far failed to provide positive support for this hypothesis, and the NJL model in which the existence of hybrid stars is allowed might be more consistent with the observation.

Phys. Rev. D 111, 063040, Published 14 March, 2025

References in corpus (15)

• The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
• GRB Radiative Efficiencies Derived from the Swift Data: GRBs vs. XRFs, Long vs. Short
• A new method of determining the initial size and Lorentz factor of gamma-ray burst fireballs using a thermal emission component
• Hyper-accreting black hole as GRB central engine. I: Baryon loading in GRB jets
• Photosphere emission from a hybrid relativistic outflow with arbitrary dimensionless entropy and magnetization in GRBs
• Numerical Simulation of the Hydrodynamical Combustion to Strange Quark Matter
• Evidence for jet launching close to the black hole in GRB 101219B - a Fermi GRB dominated by thermal emission
• High-Energy Non-Thermal and Thermal Emission from GRB141207A detected by Fermi
• Evolution of equal mass binary bare quark stars in full general relativity: could a supramassive merger remnant experience prompt collapse?
• Two-flavor color superconducting quark stars may not exist
• Thermal Relaxation and Cooling of Quark Stars with a Strangelet Crust
• The Origin of the Photospheric Emission of GRB 220426A
• Spectral and Jet Properties of the Quasi-thermal Dominated GRB 210121A, GRB 210610B and GRB 221022B
• GRB 210121A: Observation of photospheric emissions from different regimes and the evolution of the outflow
• Compact Stars as Hideouts For Color-spin-locked Quark Matter: Implications for Powering High-energy Electromagnetic Emissions

Cited by in corpus (1)

• Pair luminosity and cooling of newborn strange star: unpaired quarks