Interpretation of radioastronomic observations of H2CO and H110α in W40 and Serpens South star formation regions of Aquila molecular cloud

Abstract

This study presents the results of radio astronomy observations of the absorption spectral lines of a formaldehyde molecule (H₂CO) and the H_110α recombination line towards the Aquila molecular cloud.

The paper interprets the radio astronomy observations of H₂CO (l₁₀-l₁₁) and H_110α in the W40 and Serpens South of the Aquila Rift molecular complex, which were obtained by the 26 m Nan-Shan radio telescope of the Xinjiang Astronomical Observatory of the Chinese Academy of Sciences. In order to construct radio maps, we also used archival data obtained by observing ¹²СО(2−1) and ¹³CO(2−1) and 6 cm continuum molecules for the Aquila Rift region.

Based on the obtained observational data, the optical depth and column density were calculated for the H₂CO absorption line and ¹³CO emission line (J = 1-0), integrated intensity maps were constructed with the ionized hydrogen region H II and imposed contours that correspond to the absorption lines of H₂CO and the recombination line H_110α in the direction of the Aquila molecular cloud; maps of radiation intensity ¹³CO (1−0), distribution of 6 cm of the radio continuum, infrared radiation superimposed on integrated absorption contours of H₂CO; dependences of linear flows and peak column densities for H₂CO and ¹³CO are obtained. In the work it is shown that the Serpens South region, highlighted by the contours during the absorption of formaldehyde H₂CO, comes from the cosmic microwave background. A correlation was found between the parameter values ​​for the H₂CO absorption line and the ¹³CO emission line. Integrated intensity maps were constructed for various values ​​of the channel velocity of the H₂CO absorption line in the direction of the Aquila molecular cloud. It was revealed that the rates of H₂CO and ¹³CO have close values ​​to each other.

An analysis of the study led to the conclusion that the absorption lines of the H₂CO formaldehyde molecule and the ¹³CO emission lines originate from the same region in the Aquila Rift complex of the Aquila molecular cloud.