We calculate the absorption coefficient of scalar field on the background of the two-dimensional AdS black hole, which is of relevance to Hawking radiation. For the massless scalar field, we find that there does not exist any massless radiation.
@article{arxiv.hep-th/9902093,
title = {Absorption cross section and Hawking radiation in two-dimensional AdS black hole},
author = {Won Tae Kim and John J. Oh and Jung Hee Park},
journal= {arXiv preprint arXiv:hep-th/9902093},
year = {2009}
}