Quick search Find article
Quick search
Find article

The apparent shape of a rotating charged black hole, closed photon orbits and the bifurcation set A4

A de Vries

Show affiliations


The apparent shapes of various Kerr-Newman spacetimes are plotted. For this purpose the geometry of closed photon orbits is studied, forming a subset of the bifurcation set A 4 , well known in elementary catastrophe theory. One additional result is that the cosmic censorship hypothesis guarantees that the spacetime casts a shadow, whereas naked ring singularities enable the visibility of the `anti-world' of negative radii r through its interior. Moreover, the optical restrictions to the observability of the shadow of an astronomical black hole are inferred.


PACS

04.70.-s Physics of black holes

04.20.Dw Singularities and cosmic censorship

97.60.Lf Black holes

MSC

83C57 Black holes

83C75 Space-time singularities, cosmic censorship, etc.

Subjects

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 1 (7 January 2000)

Received 12 April 1999



  1. The apparent shape of a rotating charged black hole, closed photon orbits and the bifurcation set A4

    A de Vries 2000 Class. Quantum Grav. 17 123

  2. Accurate pyrometry with microsecond time resolution

    L Coslovi et al 1979 J. Phys. E: Sci. Instrum. 12 216

  3. A measure of the information content of EIT data

    Andy Adler et al 2008 Physiol. Meas. 29 S101

  4. Synthetic-aperture imaging from high-Doppler-resolution measurements

    Brett Borden and Margaret Cheney 2005 Inverse Problems 21 1

  5. Radiation quantities and units—understanding the sievert

    P J Allisy-Roberts 2005 J. Radiol. Prot. 25 97

  6. Growth of a Bose-Einstein condensate: a detailed comparison of theory and experiment

    M J Davis and C W Gardiner 2002 J. Phys. B: At. Mol. Opt. Phys. 35 733

  7. Inverse scattering for the Laplace–Beltrami operator with complex electromagnetic potentials and embedded obstacles

    Stephen O'Dell 2006 Inverse Problems 22 1579

  8. Use of data-driven phase space models in assessing the strength of a bolted connection in a composite beam

    J M Nichols et al 2004 Smart Mater. Struct. 13 241

  9. Topological dimension and local coordinates from time series data

    D S Broomhead et al 1987 J. Phys. A: Math. Gen. 20 L563

  10. The covariant approach to LRS perfect fluid spacetime geometries

    Henk van Elst and George F R Ellis 1996 Class. Quantum Grav. 13 1099

View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.