TY  - JOUR
AU  - Olmo, G. J.
AU  - Rubiera-Garcia, D.
PY  - 2020
DA  - 2020//
TI  - Junction conditions in Palatini f(R) gravity
T2  - Class. Quantum Gravity
JO  - Classical and Quantum Gravity
SP  - 215002 - 11pp
VL  - 37
IS  - 21
PB  - Iop Publishing Ltd
KW  - f(R) gravity
KW  - junction conditions
KW  - Palatini approach
KW  - stellar structure
AB  - We work out the junction conditions for f(R) gravity formulated in metric-affine (Palatini) spaces using a tensor distributional approach. These conditions are needed for building consistent models of gravitating bodies with an interior and exterior regions matched at some hypersurface. Some of these conditions depart from the standard Darmois-Israel ones of general relativity and from their metric f(R) counterparts. In particular, we find that the trace of the stress-energy momentum tensor in the bulk must be continuous across the matching hypersurface, though its normal derivative need not to. We illustrate the relevance of these conditions by considering the properties of stellar surfaces in polytropic models, showing that the range of equations of state with potentially pathological effects is shifted beyond the domain of physical interest. This confirms, in particular, that neutron stars and white dwarfs can be safely modelled within the Palatini f(R) framework.
SN  - 0264-9381
UR  - https://arxiv.org/abs/2007.04065
UR  - https://doi.org/10.1088/1361-6382/abb924
DO  - 10.1088/1361-6382/abb924
LA  - English
N1  - WOS:000575326000001
ID  - Olmo+Rubiera-Garcia2020
ER  -