Abstract
We consider stability of spherically symmetric solutions in gravity model proposed by Starobinsky. We find that the model suffers from a severe fine-tuning problem when applied to compact objects like neutron stars. The problem can be remedied by introducing a cutoff on the mass of the scalar degree of freedom present in the model. A new mass scale associated with neutron stars density is then required for the stabilities of gravity solutions inside relativistic stars.
- Received 16 August 2009
DOI:https://doi.org/10.1103/PhysRevD.80.127501
©2009 American Physical Society