Let’s Challenge the Relativistic Radiation Hydrodynamics: 1 Status and Problems of Moment Formalism

相対論的輻射流体力学の分野は，相対論的天体現象において基礎的分野にもかかわらず，定式化の段階で不完全で未完成であり，まだまだ基礎研究が必要だし，解決すべき課題（お宝）がたくさん残っている．数年ほど修行してようやくレベル50ぐらいには達したと思うが，まだまだ先は長そうだ．そこで，とりあえず，現時点までにわかってきたこと，発掘できたお宝，発掘中のもの，隠されている謎など，数回にわけて報告してみたい．The field of the relativistic radiation hydrodynamics is very wide and deep but fundmental for various relativistic astrophysical phenomena. However, its moment formalism is insuffcient and imperfect. Thus, it is necessary to do many fundamental researches, and there remain many treasures to be found. After a few years training and reaching about the level 50, we show and introduce the present status, founded orbs, expected ones, and hidden enigmas