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Table · dataset · 1998

Illumination in binaries

Listed in IVOA Registry (Virtual Observatory)

We give a simple, but accurate method that can be used to account for illumination in compact binary systems which have a low-mass companion, even if spherically symmetric illumination of the secondary star (not necessarily on the main sequence) is not assumed.

Description

This is done by introducing a multiplicative factor {PHI} in the Stefan-Boltzmann surface boundary condition, which accounts for the blocking of the intrinsic secondary flux by X-ray heating of the photospheric layers.

Numerical fits and tables for {PHI} are given for unperturbed effective temperatures in the range 2500-5600K and logg in the range 1.0-5.0.

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