Dynamical surface gravity

Nielsen, A. B.; Yoon, Ji Hye

doi:10.1088/0264-9381/25/8/085010

Cited by 103 publications

(108 citation statements)

References 19 publications

(64 reference statements)

Supporting

Mentioning

104

Contrasting

Unclassified

Order By: Relevance

“…which agrees with the calculations in [83]. This seems to suggest that it is exactly the pole at r = 2m that is responsible for the tunneling flux through the horizon.…”

Section: Hawking Radiation For Trapping Horizonssupporting

confidence: 90%

“…The issue of how to define the surface gravity for a non-Killing horizon was examined in [83]. Perhaps the simplest approach is to define the surface gravity as the non-affinity of the null normal to the horizon whose vanishing expansion defines the horizon, l a .…”

Section: The Zeroth Law For Trapping Horizonsmentioning

confidence: 99%

“…This definition by itself does not fix the normalisation freedom in the value of κ and is by no means the only possible choice [83].…”

Section: The Zeroth Law For Trapping Horizonsmentioning

confidence: 99%

See 2 more Smart Citations

Black holes and black hole thermodynamics without event horizons

Nielsen

2009

Gen Relativ Gravit

View full text Add to dashboard Cite

We investigate whether black holes can be defined without using event horizons. In particular we focus on the thermodynamic properties of event horizons and the alternative, locally defined horizons. We discuss the assumptions and limitations of the proofs of the zeroth, first and second laws of black hole mechanics for both event horizons and trapping horizons. This leads to the possibility that black holes may be more usefully defined in terms of trapping horizons. We also show how Hawking radiation can also be seen to arise from trapping horizons and discuss which horizon area should be associated with the gravitational entropy.Comment: Invited review article for General Relativity and Gravitation. 43 page

show abstract

“…which agrees with the calculations in [83]. This seems to suggest that it is exactly the pole at r = 2m that is responsible for the tunneling flux through the horizon.…”

Section: Hawking Radiation For Trapping Horizonssupporting

confidence: 90%

Section: The Zeroth Law For Trapping Horizonsmentioning

confidence: 99%

See 1 more Smart Citation

Black holes and black hole thermodynamics without event horizons

Nielsen

2009

Gen Relativ Gravit

View full text Add to dashboard Cite

show abstract

“…This temperature is also derived by Nielsen and Yeom in [59,60] by using a slightly different approach of PW method for a general time dependent background. At this point we understand that the temperature (18) does not care about the spin of the tunneling particles.…”

Section: Radial Null Geodesic Methodsmentioning

confidence: 89%

Higher spins tunneling from a time dependent and spherically symmetric black hole

Siahaan¹

2016

Eur. Phys. J. C

View full text Add to dashboard Cite

The discussions of Hawking radiation via tunneling method have been performed extensively in the case of scalar particles. Moreover, there are also several works in discussing the tunneling method for Hawking radiation by using higher spins, e.g. neutrino, photon, and gravitino, in the background of static black holes. Interestingly, it is found that the Hawking temperature for static black holes using the higher spins particles has no difference compared to the one computed using scalars. In this paper, we study the Hawking radiation for a spherically symmetric and time dependent black holes using the tunneling of Dirac particles, photon, and gravitino. We find that the obtained Hawking temperature is similar to the one derived in the tunneling method by using scalars.

show abstract

“…Conformal invariance of the relevant physics suggests that Hawking radiation should be associated with the conformal Killing horizon, not the trapping horizon (or apparent horizon) even in the Vaidya spacetime, which is a full solution of the Einstein equations with reasonable matter content formulated in the canonical conformal frame. For this static metric in static coordinates, a standard calculation [12] gives the surface gravity as:…”

Section: Static Conformal Vaidyamentioning

confidence: 99%

Revisiting Vaidya Horizons

Nielsen

2014

Galaxies

View full text Add to dashboard Cite

In this study, we located and compared different types of horizons in the spherically symmetric Vaidya solution. The horizons we found were trapping horizons, which can be null, timelike, or spacelike, null surfaces with constant area change and also conformal Killing horizons. The conformal Killing horizons only exist for certain choices of the mass function. Under a conformal transformation, the conformal Killing horizons can be mapped into true Killing horizons. This allows conclusions drawn in the dynamical Vaidya spacetime to be related to known properties of static spacetimes. We found the conformal factor that performs this transformation and wrote the new metric in explicitly static coordinates. Using this construction we found that the tunneling argument for Hawking radiation does not umabiguously support Hawking radiation being associated with the trapping horizon. We also used this transformation to derive the form of the surface gravity for a class of physical observers in Vaidya spacetimes.

show abstract

Dynamical surface gravity

Cited by 103 publications

References 19 publications

Black holes and black hole thermodynamics without event horizons

Black holes and black hole thermodynamics without event horizons

Higher spins tunneling from a time dependent and spherically symmetric black hole

Revisiting Vaidya Horizons

Contact Info

Product

Resources

About