Molecular Emission in Dense Massive Clumps from the Star-Forming Regions S231-S235

摘要: The article deals with observations of star-forming regions S231-S235 in 'quasi-thermal' lines ammonia (NH$_3$), cyanoacetylene (HC$_3$N) and maser methanol (CH$_3$OH) water vapor (H$_2$O). is situated the giant molecular cloud G174+2.5. We selected all massive clumps G174+2.5 using archive CO data. For each clump we determined mass, size column density. After that performed these clumps. report about first detections NH$_3$ HC$_3$N toward WB89 673 668. This means high-density gas present there. Physical parameters were estimated data on emission. found temperature hydrogen number density are ranges 16-30 K 2.8-7.2$\times10^3$ cm$^{-3}$, respectively. shock-tracing line CH$_3$OH molecule at 36.2 GHz newly detected 673.