A generating function and new exact solutions for geodesic matter

Mahomed, A. B.; Maharaj, S. D.; Narain, R.

doi:10.1007/s13370-020-00806-0

Cited by 2 publications

(2 citation statements)

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“…which is the conserved total charge contained in the star, since J a ;a = 0. Thus the expressions ( 14) and ( 15) close the system (13). The nonzero components of ( 1) are then given by…”

Section: Interior Spacetimementioning

confidence: 73%

“…An expansion-free radiating body was developed by Sharif and Azam [11]. A geodesic stellar body in the presence of a e-mail: maharaj@ukzn.ac.za (corresponding author) b e-mail: drbrasselint@gmail.com the electromagnetic field was generated by Ivanov [12] and Mahomed et al [13]. Also, the condition for vanishing shear was made by Charan et al [14], and the shear-free condition has been investigated in different physical scenarios [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Radiating composite stars with electromagnetic fields

Maharaj

Brassel

2021

Eur. Phys. J. C

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We derive the junction conditions for a general spherically symmetric radiating star with an electromagnetic field across a comoving surface. The interior consists of a charged composite field containing barotropic matter, a null dust and a null string fluid. The exterior atmosphere is described by the generalised Vaidya spacetime. We generate the boundary condition at the stellar surface showing that the pressure is determined by the interior heat flux, anisotropy, null density, charge distribution and the exterior null string density. A new physical feature that arises in our analysis is that the surface pressure depends on the internal charge distribution for generalised Vaidya spacetimes. It is only in the special case of charged Vaidya spacetimes that the matching interior charge distribution is equal to the exterior charge at the surface as measured by an external observer. Previous treatments, for neutral matter and charged matter, arise as special cases in our treatment of composite matter.

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“…which is the conserved total charge contained in the star, since J a ;a = 0. Thus the expressions ( 14) and ( 15) close the system (13). The nonzero components of ( 1) are then given by…”

Section: Interior Spacetimementioning

confidence: 73%