Observations of “Hot Cores”

Abstract

Recent observational results toward the “Hot Core” sources (Orion KL, SgrB2, G34.3+0.15, W51, and so on) are summarized. Several saturated organic molecules are commonly observed among these sources, and these results favor formations on the grain mantles followed by evaporation. Some results of surveys in “hot core molecules” are presented. Such molecules may be used as diagnostics to establish the presence of “hot core” regions.