On the physical nature of the source of ultraluminous X-ray pulsations

Abstract

To reconcile the observed unusual high luminosity of NuSTAR X-ray pulsations from M82X-2 with the most extreme violation of the Eddington limit, and in view that the persistent X-ray radiation from M82X-2 almost precludes the possibility of common pulsars, we tackle the problem by the implications of microscopic theory of black hole (MTBH). The preceding developments of MTBH are proved to be quite fruitful for the physics of ultra-high energy (UHE) cosmic-rays. Namely, replacing a central singularity by the infrastructures inside event horizon, subject to certain rules, MTBH explains the origin of ZeV-neutrinos which are of vital interest for the source of UHE-particles. The M82X-2 is assumed to be a spinning intermediate mass black hole resided in final stage of growth. Then, the thermal blackbody X-ray emission, arisen due to the rotational kinetic energy of black hole, escapes from event horizon through the vista to outside world, which is detected as ultraluminous X-ray pulsations. The M82X-2 indeed releases ∼ 99.6 % of its pulsed radiative energy predominantly in the X-ray bandpass 0.3-30 keV. We derive a pulse profile and give a quantitative account of energetics and orbital parameters of the semi-detached X-ray binary containing a primary accretor M82X-2 of inferred mass M 138.5-226 M and secondary massive, M 2 > 48.3-64.9 M , O/B-type donor star with radius of R > 22.1-25.7 R , respectively. We compute the torque added to M82X-2 per unit mass of accreted matter which yields the measured spin-up rate.

Rotating Black Holes in Microscopic Theory: the Implications for Periodic Source M82X-2

“…We supplement our previous investigation [1] of observed unusual high luminosity of NuSTAR X-ray pulsations from M82X-2, further, by more rigorous analytical treatment of rotating SPC. We derive corresponding field equations and obtain both internal and global vacuum spacetime solutions.…”

“…The OEH introduces the corrections to the characteristic phase profile of previous model of X-ray radiation from M82X-2, derived in approximation of spherical EH [1]. Certainly, let (z,x,y) be the spacefixed Cartesian coordinate system, with zx as a plane-of sight, and the axis s of the M82X-2-fixed frame as the rotation axis.…”

“…Provided, the correction function is denotetd by Υ (e, α) := C 1 (e, α)/2πr g , Φ(θ, ϕ, α, t) is the phase profile in case of spherical EH [1]:…”

“…This difficulty is brought even into sharper focus by considering the association with M82X-2, which is featured with high luminosity (≃ 1.8 × 10 40 erg s −1 ) of additional persistent continuous broad X-ray For brevity reasons in [1], we have refrained from providing rigorous theoretical evolutionary paths of the equations describing the rotating black holes, instead we have proceeded in relatively simple way of considering non-rotating black holes, which is quick to estimate the most important conceptual aspects of associated physics, without loss of generality. However, we need to be more rigorous about a geometry which describes rotating axisymmetric black holes.…”

Plausible Intermediate Mass Black Hole from M82X-2 X-Ray Pulsations

“…Alternative approach to circumvent the obstacles was studied in [1,2] by addressing the M82X-2 as a spinning intermediate mass black hole, resided in final stage of growth. This approach employs the microscopic theory of black hole (MTBH), which explores a spontaneous breaking of gravitation gauge symmetry at huge energies.…”