38 citations · 278 across the 20 of their papers we have counts for
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Sensitivity of the Neutron Star Equation of State Inferences to Mass and Radius Measurements
Dmitry D. Ofengeim, Peter S. Shternin, Tsvi Piran
We examine how inferences of the neutron-star equation of state depend on mass and radius observations. We update previous results with recent measurements combined with theoretica…
The 300 TeV photon from GRB 221009A: a Hint at Non-linear Lorentz Invariance Violation?
Dmitry D. Ofengeim, Tsvi Piran
The air shower array Carpet-3 detected a 300 TeV photon from the direction of GRB 221009A at 4536 s after the Fermi-GBM trigger for this event. If the association with this gamma-r…
Magnetothermal evolution of neutron star cores in the `weak-coupling' regime: implications of ambipolar diffusion for the quiescent X-ray luminosity of magnetars
N. A. Moraga, F. Castillo, D. D. Ofengeim +5
The high quiescent X-ray luminosity observed in some magnetars is widely attributed to the decay and evolution of their ultra-strong magnetic fields. Several dissipation mechanisms…
A three-parameter characterization of neutron stars' mass-radius relation and equation of state
Dmitry D. Ofengeim, Peter S. Shternin, Tsvi Piran
Numerous models of neutron star (NS) equation of state (EoS) exist based on different superdense-matter physics approaches. Nevertheless, some NS properties show universal (EoS-ind…
Maximal Mass Neutron Star as a Key to Superdense Matter Physics
D. D. Ofengeim, P. S. Shternin, T. Piran
We propose a universal approximation of the equation of state of superdense matter in neutron star (NS) interiors. It contains only two parameters, the pressure and the density at…
Lorentz Invariance Violation Limits from GRB 221009A
Tsvi Piran, Dmitry D. Ofengeim
It has been long conjectured that a signature of Quantum Gravity will be Lorentz Invariance Violation (LIV) that could be observed at energies much lower than the Planck scale. One…
Constraints on neutron star superfluidity from the cooling neutron star in Cassiopeia A using all Chandra ACIS-S observations
Peter S. Shternin, Dmitry D. Ofengeim, Craig O. Heinke +1
Analysis of Chandra observations of the neutron star (NS) in the centre of the Cassiopeia A supernova remnant taken in the subarray (FAINT) mode of the ACIS detector performed by P…
Model-independent constraints on superfluidity from the cooling neutron star in Cassiopeia A
Peter S. Shternin, Dmitry D. Ofengeim, Wynn C. G. Ho +3
We present a new model-independent (applicable for a broad range of equations of state) analysis of the neutrino emissivity due to triplet neutron pairing in neutron star cores. We…
Magnetic field evolution timescales in superconducting neutron stars
Mikhail E. Gusakov, Elena M. Kantor, Dmitry D. Ofengeim
The self-consistent approach to the magnetic field evolution in neutron star cores, developed recently, is generalised to the case of superfluid and superconducting neutron stars.…
Universal properties of maximum-mass neutron stars: a new tool to explore superdense matter
D. D. Ofengeim
I have demonstrated the existence of a tight correlation between the mass, radius, central density, and pressure of maximum-mass neutron stars modeled using diverse baryonic equati…
Bulk viscosity in neutron stars with hyperon cores
D. D. Ofengeim, M. E. Gusakov, P. Haensel +1
It is well-known that r-mode oscillations of rotating neutron stars may be unstable with respect to the gravitational wave emission. It is highly unlikely to observe a neutron star…
Fast magnetic field evolution in neutron stars: the key role of magnetically induced fluid motions in the core
D. D. Ofengeim, M. E. Gusakov
In [Gusakov et al.\ PRD, 96, 103012, (2017)], we proposed a self-consistent method to study the quasistationary evolution of the magnetic field in neutron-star cores. Here we apply…
Neutrino luminosities and heat capacities of neutron stars in analytic form
D. D. Ofengeim, M. Fortin, P. Haensel +2
We derive analytic approximations for the neutrino luminosities and the heat capacities of neutron stars with isothernal nucleon cores as functions of the mass and radius of stars.…
Evolution of the magnetic field in neutron stars
M. E. Gusakov, E. M. Kantor, D. D. Ofengeim
We propose a general method to self-consistently study the quasistationary evolution of the magnetic field in the cores of neutron stars. The traditional approach to this problem i…
Analytic approximations of neutrino luminosities and heat capacities of neutron stars with nucleon cores
D. D. Ofengeim, M. Fortin, P. Haensel +2
We derive analytic approximations of neutrino luminosities and heat capacities of neutron stars with nucleon cores valid for a wide class of equations of state of dense nucleon mat…