Detection of interstellar cyanamide (NH 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 amiderelated molecule cyanamide (NH2CN) is known as one of the rare interstellar molecule which has a major role in the formation of urea (NH2CONH2). In this paper, we presented the detection of the rotational emission lines of cyanamide (NH2CN) 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 NH2CN using the rotational diagram model was N(NH2CN) = (6.60 ± 0.1) × 1015 cm−2 with rotational temperature (Trot) = 201.2 ± 3.3 K. The fractional abundance ofNH2CN with respect toH2 towards the G10.47+0.03was f (NH2CN) = 5.076×10−8. Additionally, the estimated NH2CN/NH2CHO abundance ratio towards the G10.47+0.03 was 0.170, which was nearly similar with NH2CN/NH2CHO abundance ratio towards the IRAS 16293–2422 B and Sgr B2 (M). We found that the observed abundance of NH2CN with respect to H2 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 NH2CN.