Gas kinetic temperature in molecular clouds of supernova S140

Abstract

In order to obtain an estimation of the kinetic temperature of the molecular gas for the supernova S140, the spectra of the symmetric-top molecule methyl acetylene (CH₃C₂H) lines and spectra of the molecules carbon monoxide (CO) and its isotopic variant ¹³CO were analyzed to compare the results on temperature with those got from methyl acetylene.

This study had done depending data from radio telescope (20-meter sub-mm) in Onsala Space Observatory on the web site: http://www.oso.chalmers.se/ , the data are in two different observation modes, frequency- and beam switching, respectively. The results obtained rather similar which is equal to 32.2 K and 36 K.