SIMBAD references

2006A&A...460..953M - Astronomy and Astrophysics, volume 460, 953-958 (2006/12-4)

Collisional excitation of monodeuterated ammonia NH2D by helium.

MACHIN L. and ROUEFF E.

Abstract (from CDS):

Observations of deuterated molecules are useful probes of the physical and chemical conditions in star-forming regions. However their detailed interpretation is hampered by the lack of knowledge of the corresponding collisional rate coefficients. We extend our previous study of ammonia collisional excitation by helium to monodeuterated ammonia NH2D, which has been found to be abundant in a variety of environments. We introduce the principal isotopic effects in the collisional equations by calculating the relevant angular dependence of the intermolecular potential energy surface. Cross sections are calculated in the coupled states approximation, and collisional rate coefficients are given from 5 to 100K, a range of temperatures that is relevant in the interstellar medium.These results allow to include justifiable collisional excitation rate coefficients of NH2D by He in the analysis of the emitted radiation for the first time

Abstract Copyright:

Journal keyword(s): ISM: general - ISM: molecules - molecular data - molecular processes - scattering

Simbad objects: 5

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2006A&A...460..953M and select 'bookmark this link' or equivalent in the popup menu


2019.12.12-09:41:22

© Université de Strasbourg/CNRS

    • Contact