Is PSR J0514$-$4002E in a PBH-NS binary?

Abstract

Recent pulsar timing observations using MeerKAT of the eccentric binary millisecond pulsar, PSR J0514$-$4002E, have unveiled a companion with a mass in the mass gap, ranging from $2.09M_{\odot }$ to $2.71M_{\odot }$. This challenges conventional astrophysical scenarios for black hole formation. In this paper, we present an alternative explanation: PSR J0514$-$4002E could be in a PBH-NS binary, with the companion potentially being a primordial black hole formed during the early Universe's first-order phase transition. The associated stochastic gravitational-wave background generated during this phase transition can account for the observed signal from the pulsar timing array, and the abundance of primordial black holes is consistent with constraints from LIGO-Virgo-KAGRA.

6 pages, 3 figures, version accepted for publication in Sci. China Phys. Mech. Astron. (SCPMA);

References in corpus (25)

• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
• Primordial Black Holes as Dark Matter
• The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
• The NANOGrav 15-year Data Set: Search for Signals from New Physics
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• The cosmological gravitational wave background from primordial density perturbations
• The NANOGrav 15-year Data Set: Observations and Timing of 68 Millisecond Pulsars
• The second data release from the European Pulsar Timing Array I. The dataset and timing analysis
• The Parkes Pulsar Timing Array Third Data Release
• The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities
• Impact of the PSR J0740+6620 radius constraint on the properties of high-density matter
• Primordial black hole production during first-order phase transitions
• Primordial seeds of supermassive black holes
• Implications for the non-Gaussianity of curvature perturbation from pulsar timing arrays
• A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes
• First-order Phase Transition interpretation of PTA signal produces solar-mass Black Holes
• Primordial Black Holes from Supercooled Phase Transitions
• The Need For Speed: Rapid Refitting Techniques for Bayesian Spectral Characterization of the Gravitational Wave Background Using PTAs
• Causal gravitational waves as a probe of free streaming particles and the expansion of the Universe
• Gravitational waves from colliding vacuum bubbles in gauge theories
• Does Matter Matter? Using the mass distribution to distinguish neutron stars and black holes
• Ultra-low frequency gravitational waves from cosmological and astrophysical processes
• Establishing the Non-Primordial Origin of Black Hole-Neutron Star Mergers

Cited by in corpus (1)

• Confronting primordial black holes with LIGO-Virgo-KAGRA and the Einstein Telescope