@article{oai:ir.soken.ac.jp:00003314, author = {池内, 了 and IKEUCHI, Satoru and MURAKAMI, Izumi and REES, Martin J}, issue = {6}, journal = {Publications of the Astronomical Society of Japan, Publications of the Astronomical Society of Japan}, month = {}, note = {application/pdf, As a model for the Lymann alpha forest, the evolution of baryon clouds under the potential of cold dark matter, so-called minihalos, is examined by taking into account the time variation of diffuse UV flux. After minihalos settle into a stable equilibrium branch, they are gradually destabilized due to a decrease in UV flux; finally, they undergo a free-fall collapse, probably leading to the formation of low-mass galaxies. This behavior is related to the observed number density evolution of the Lyman alpha forest and the mass spectrum of minihalos. A new idea for the inverse effect in relation to this minihalo evolution is also presented.}, pages = {1095--1106}, title = {Number density evolution of Lyman-alpha clouds - Evolving minihalos}, volume = {41}, year = {1989} }