Detection of interstellar cyanamide (NH$_{2}$CN) towards the hot molecular core G10.47$+$0.03

Abstract

In the interstellar medium, the amide-type molecules play an important role in the formation of prebiotic molecules in the hot molecular cores or high-mass star-formation regions. The complex amide-related molecule cyanamide (NH$_{2}$CN) is known as one of the rare interstellar molecule which has a major role in the formation of urea (NH$_{2}$CONH$_{2}$). In this paper, we presented the detection of the rotational emission lines of cyanamide (NH$_{2}$CN) towards the hot molecular core G10.47$+$0.03 between the frequency range of 158.49–160.11 GHz using the Atacama Large Millimeter/Submillimeter Array (ALMA) interferometric radio telescope. The estimated column density of the emission lines of NH$_{2}$CN using the rotational diagram model was $N(\mathrm{NH}_{2}\mathrm{CN}) = (6.60\pm 0.1)\times 10^{15}$ cm$^{-2}$ with rotational temperature ($T_\mathrm{rot}) = 201.2\pm 3.3$ K. The fractional abundance of NH$_{2}$CN with respect to H$_{2}$ towards the G10.47$+$0.03 was $f(\mathrm{NH}_{2}\mathrm{CN}) = 5.076\times 10^{-8}$. Additionally, the estimated NH$_{2}$CN/NH$_{2}$CHO abundance ratio towards the G10.47$+$0.03 was 0.170, which was nearly similar with NH$_{2}$CN/NH$_{2}$CHO abundance ratio towards the IRAS 16293–2422 B and Sgr B2 (M). We found that the observed abundance of NH$_{2}$CN with respect to H$_{2}$ towards the G10.47$+$0.03, fairly agrees with the theoretical value predicted by Garrod (2013). We also discussed the possible formation and destruction pathways of NH$_{2}$CN.