Self-similar collapse of a scalar field in dilaton gravity and critical behaviour
نویسنده
چکیده
We present new analytical self-similar solutions describing a collapse of a massless scalar field in scalar-tensor theories. The solutions exhibit a type of critical behavior. The black hole mass for the near critical evolution is analytically obtained for several scalar-tensor theories and the critical exponent is calculated. Within the framework of the analytical models we consider it is found that the black hole mass law for some scalar-tensor theories is of the form MBH = f(p−pcr)(p−pcr) which is slightly different from the general relativistic law MBH = const(p − pcr) .
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