90 citations · 603 across the 15 of their papers we have counts for
15 papers
Greybody factor for massive fermion emitted by a black hole in dRGT massive gravity theory
P. Boonserm, C. H. Chen, T. Ngampitipan +1
The greybody factor of the massive Dirac field around the black hole in the dRGT massive gravity theory is investigated using the rigorous bound and the WKB approximation methods.…
Decomposition of total stress-energy for the generalised Kiselev black hole
Petarpa Boonserm, Tritos Ngampitipan, Alex Simpson +1
We demonstrate that the anisotropic stress-energy supporting the Kiselev black hole can be mimicked by being split into a perfect fluid component plus either an electromagnetic com…
ISCOs and OSCOs in the presence of positive cosmological constant
Petarpa Boonserm, Tritos Ngampitipan, Alex Simpson +1
Normally one thinks of the observed cosmological constant as being so small that it can be utterly neglected on typical astrophysical scales, only affecting extremely large-scale c…
Greybody factor for black string in dRGT massive gravity
P. Boonserm, T. Ngampitipan, P. Wongjun
The greybody factor from the black string in the de Rham-Gabadadze-Tolley (dRGT) massive gravity theory is investigated in this study. The dRGT massive gravity theory is one of the…
The exponential metric represents a traversable wormhole
Petarpa Boonserm, Tritos Ngampitipan, Alex Simpson +1
For various reasons a number of authors have mooted an "exponential form" for the spacetime metric: \[ ds^2 = - e^{-2m/r} dt^2 + e^{+2m/r}\{dr^2 + r^2(dθ^2+\sin^2θ\, dϕ^2)\}. \] Wh…
Near-horizon geodesics for astrophysical and idealised black holes: Coordinate velocity and coordinate acceleration
Petarpa Boonserm, Tritos Ngampitipan, Matt Visser
Geodesics (by definition) have an intrinsic 4-acceleration zero. However, when expressed in terms of coordinates, the coordinate acceleration can very easily be non…
Greybody factor for black holes in dRGT massive gravity
Petarpa Boonserm, Tritos Ngampitipan, Pitayuth Wongjun
In general relativity, greybody factor is a quantity related to the quantum nature of a black hole. A high value of greybody factor indicates a high probability that Hawking radiat…
Modelling anisotropic fluid spheres in general relativity
Petarpa Boonserm, Tritos Ngampitipan, Matt Visser
We argue that an arbitrary general relativistic static anisotropic fluid sphere, (static and spherically symmetric but with transverse pressure not equal to radial pressure), can n…
Super-radiance and flux conservation
Petarpa Boonserm, Tritos Ngampitipan, Matt Visser
The theoretical foundations of the phenomenon known as super-radiance still continues to attract considerable attention. Despite many valiant attempts at pedagogically clear presen…
Greybody factors for Myers-Perry black holes
Petarpa Boonserm, Auttakit Chatrabhuti, Tritos Ngampitipan +1
The Myers-Perry black holes are higher-dimensional generalizations of the usual (3+1)-dimensional rotating Kerr black hole. They are of considerable interest in Kaluza-Klein models…
Bounding the greybody factors for scalar excitations of the Kerr-Newman spacetime
Petarpa Boonserm, Tritos Ngampitipan, Matt Visser
Finding exact solutions for black-hole greybody factors is generically impractical; typically one resorts either to making semi-analytic or numerical estimates, or alternatively to…
Regge-Wheeler equation, linear stability, and greybody factors for dirty black holes
Petarpa Boonserm, Tritos Ngampitipan, Matt Visser
So-called "dirty" black holes are those surrounded by non-zero stress-energy, rather than vacuum. The presence of the non-zero stress-energy modifies key features of the black hole…
Reflection and transmission resonances and accuracy of the wkb method
Tritos Ngampitipan, Petarpa Boonserm
In this paper, we calculate the transmission and reflection amplitudes of wave functions for different potentials such as the delta function, the rectangular barrier, the Eckart po…
Bounding the greybody factors for the Reissner-Nordström black holes
Tritos Ngampitipan, Petarpa Boonserm
A black hole can emit radiation called Hawking radiation. Such radiation seen by an observer outside the black hole differs from the original radiation near the horizon of the blac…
Bounding the Greybody Factors for Non-rotating Black Holes
Tritos Ngampitipan, Petarpa Boonserm
Semiclassical black holes emit radiation called Hawking radiation. Such radiation, as seen by an asymptotic observer far outside the black hole, differs from original radiation nea…