SIMBAD references

2010A&A...517L...6B - Astronomy and Astrophysics, volume 517, L6-6 (2010/7-1)

The NH2D/NH3 ratio toward pre-protostellar cores around the UCHII region in IRAS 20293+3952.

BUSQUET G., PALAU A., ESTALELLA R., GIRART J.M., SANCHEZ-MONGE A., VITI S., HO P.T.P. and ZHANG Q.

Abstract (from CDS):

The deuterium fractionation, Dfrac, has been proposed as an evolutionary indicator in pre-protostellar and protostellar cores of low-mass star-forming regions. We investigate Dfrac, with high angular resolution, in the cluster environment surrounding the UCHII region IRAS20293+3952.We performed high angular resolution observations with the IRAM Plateau de Bure Interferometer (PdBI) of the ortho-NH2D111-101 line at 85.926GHz and compared them with previously reported VLA NH3 data.We detected strong NH2D emission toward the pre-protostellar cores identified in NH3 and dust emission, all located in the vicinity of the UCHII region IRAS20293+3952. We found high values of Dfrac≃0.1-0.8 in all the pre-protostellar cores and low values, Dfrac<0.1, associated with young stellar objects.The high values of Dfrac in pre-protostellar cores could be indicative of evolution, although outflow interactions and UV radiation could also play a role.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: individual objects: IRAS20293+3952 - ISM: clouds - ISM: molecules

Simbad objects: 16

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2019.10.17-13:36:08

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