First detection of cyanamide (NH${}_2$CN) towards solar-type protostars

Abstract

Searches for the prebiotically-relevant cyanamide (NH${}_2$CN) towards solar-type protostars have not been reported in the literature. We here present the first detection of this species in the warm gas surrounding two solar-type protostars, using data from the Atacama Large Millimeter/Submillimeter Array Protostellar Interferometric Line Survey (PILS) of IRAS 16293-2422 B and observations from the IRAM Plateau de Bure Interferometer of NGC1333 IRAS2A. We furthermore detect the deuterated and ${}^{13}$C isotopologues of NH${}_2$CN towards IRAS 16293-2422 B. This is the first detection of NHDCN in the interstellar medium. Based on a local thermodynamic equilibrium analysis, we find that the deuteration of cyanamide ($\sim$ 1.7%) is similar to that of formamide (NH${}_2$CHO), which may suggest that these two molecules share NH${}_2$ as a common precursor. The NH${}_2$CN/NH${}_2$CHO abundance ratio is about 0.2 for IRAS 16293-2422 B and 0.02 for IRAS2A, which is comparable to the range of values found for Sgr B2. We explored the possible formation of NH${}_2$CN on grains through the NH${}_2$ + CN reaction using the chemical model MAGICKAL. Grain-surface chemistry appears capable of reproducing the gas-phase abundance of NH${}_2$CN with the correct choice of physical parameters.

arXiv commentAccepted in A&A

References in corpus (28)

• A KInetic Database for Astrochemistry (KIDA)
• Making other Earths: Dynamical Simulations of Terrestrial Planet Formation and Water Delivery
• A three-phase chemical model of hot cores: the formation of glycine
• Complex organic molecules in the interstellar medium: IRAM 30 m line survey of Sagittarius B2(N) and (M)
• The ALMA Protostellar Interferometric Line Survey (PILS): First results from an unbiased submillimeter wavelength line survey of the Class 0 protostellar binary IRAS 16293-2422 with ALMA
• Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA
• A 2 mm spectral line survey of the starburst galaxy NGC 253
• Constraining the abundances of complex organics in the inner regions of solar-type protostars
• Near-arcsecond resolution observations of the hot corino of the solar type protostar IRAS 16293-2422
• Gas phase formation of the prebiotic molecule formamide: insights from new quantum computations
• Rotational spectroscopy, tentative interstellar detection, and chemical modelling of N-methylformamide
• The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium
• Probing the inner 200 AU of low-mass protostars with the Submillimeter Array: Dust and organic molecules in NGC1333-IRAS2A
• The ALMA-PILS survey: First detections of ethylene oxide, acetone and propanal toward the low-mass protostar IRAS 16293-2422
• The ALMA-PILS survey: Detection of CH${}_3$NCO toward the low-mass protostar IRAS 16293-2422 and laboratory constraints on its formation
• First results from the CALYPSO IRAM-PdBI survey. II. Resolving the hot corino in the Class 0 protostar NGC 1333-IRAS2A
• Simultaneous Hydrogenation and UV-photolysis Experiments of NO in CO-rich Interstellar Ice Analogues; linking HNCO, OCN-, NH2CHO and NH2OH
• A lambda = 1.3 mm and 2 mm molecular line survey towards M82
• Formation of the prebiotic molecule NH${}_2$CHO on astronomical amorphous solid water surfaces: accurate tunneling rate calculations
• The ALMA Band 9 receiver - Design, construction, characterization, and first light
• The deuterium fractionation of water on solar-system scales in deeply-embedded low-mass protostars
• A spectral survey of the Star Forming Core of the Orion Nebula from 455 -- 507 GHz
• Detection of glycolaldehyde towards the solar-type protostar NGC1333 IRAS2A
• The ALMA-PILS survey: Formaldehyde deuteration in warm gas on small scales toward IRAS 16293-2422 B
• Detection of methylisocyanate (CH3NCO) in a solar-type protostar
• The ALMA-PILS survey: 3D modeling of the envelope, disks and dust filament of IRAS 16293-2422
• High D${}_2$O/HDO ratio in the inner regions of the low-mass protostar NGC1333 IRAS2A
• Kinetic Monte Carlo simulations of the grain-surface back-diffusion effect

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