<T^(μ)_(ν)>_(ren)> of the quantized conformal fields in the Schwarzschild spacetime: Israel-Hartle-Hawking state

The renormalized expectation value of the stress-energy tensor of the conformally invariant massless field in the Israel-Hartle-Hawking state in the Schwarzschild spacetime is constructed. It is achieved through solving the conservation equation in conformal space and utilizing the regularity conditions in the physical metric. Specifically, the relation of the results of the present approach to the stress tensor constructed within the framework of the Hadamard renormalization is analysed. Finally, the semi-analytic models reconstructing the tangential component of the stress-energy tensor with the maximal deviation not exceeding 0.7% are constructed.