Abstract.
The gravitational collapse of a spherical distribution, in a class of f (R) theories of gravity, where f (R) is a power function of R , is discussed. The spacetime is assumed to admit a homothetic Killing vector. In the collapsing modes, some of the situations indeed hit a singularity, but they are all covered with an apparent horizon. Some peculiar cases are observed where the collapsing body settles to a constant radius at a given value of the radial coordinate.
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Chakrabarti, S., Banerjee, N. Gravitational collapse in f (R) gravity for a spherically symmetric spacetime admitting a homothetic Killing vector. Eur. Phys. J. Plus 131, 144 (2016). https://doi.org/10.1140/epjp/i2016-16144-1
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DOI: https://doi.org/10.1140/epjp/i2016-16144-1