FIZIKA B 17 (2008) 4, 435  446
STRUCTURE OF RADIAL NULL GEODESICS IN MONOPOLECHARGED VAIDYA SPACETIME
S. S. ZADE^{a }K. D. PATIL^{b} and P. N. MULKALWAR^{c}
^{a}Department of Mathematics, J. B. College of Science, Wardha (M. S.), India
Email address: sanjivzade@yahoo.com
^{b}Department of Mathematics, B. D. College of Engineering, Sewagram, Wardha (M. S.), India
Email address: kishordpatil@yahoo.com
^{c}Department of Computer Science, Amolakchand Mahavidyalaya, Yavatmal (M. S.), India
Received 19 December 2007; Accepted 5 November 2008
Online 12 February 2009
The monopolecharged Vaidya model containing a naked singularity is analyzed
for outgoing radial null geodesics. Using the Clarke and Krolak criteria, the
curvature strength of naked singularity is examined to show that this is a
strong curvature singularity, providing a counter example to cosmic censorship
hypothesis (CCH). The graphs of the apparent horizons for different values of
parameters have been drawn. An interesting feature which emerges is that, the
monopole component pushes the apparent horizon towards the radial axis and
thereby increases the radius of the apparent horizon in Vaidya collapse.
PACS numbers: 04.20.Dw, 04.20.Cv, 04.70.Bw
UDC 524.88, 524.35
Keywords:cosmic censorship, naked singularity, gravitational collapse
