1998A&A...332..695H


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST03:26:17

1998A&A...332..695H - Astronomy and Astrophysics, volume 332, 695-702 (1998/4-2)

The DCN/HCN abundance ratio in hot molecular cores.

HATCHELL J., MILLAR T.J. and RODGERS S.D.

Abstract (from CDS):

We have observed the 3-2 transitions of DCN and HC15N in a number of hot molecular cores previously surveyed by us with the interesting result that the DCN/HCN ratio is low, a few times 10–3, in the hot cores. The abundance ratio of DCN/HCN is derived both `on-core' and `off-core' and, in general is larger at the `off-core' positions. Comparision with chemical models of these sources indicates that DCN liberated from evaporated ices can be destroyed rapidly in the hot gas by reaction with atomic hydrogen, which works to reset the the initial DCN/HCN ratio in the ice to the gas-phase atomic D/H ratio. The low DCN/HCN abundance ratio we measure can be reached in less than 104 years, consistent with previous estimates of the core ages, if the activation energy of the reaction is less than 500K.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: molecules - radio lines: ISM - molecular processes

Simbad objects: 10

goto View the reference in ADS

Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 GAL 005.88-00.41 HII 18 00 30.388 -24 04 00.20           ~ 301 0
2 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 188 0
3 GAL 010.47+00.03 HII 18 08 38.4 -19 51 52           ~ 110 0
4 IRAS 18097-1825A cor 18 12 40.3094 -18 24 20.782           ~ 45 0
5 GAL 029.96-00.02 Y*O 18 46 03.7 -02 39 21           ~ 334 1
6 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 315 0
7 OH 34.26 +0.15 SFR 18 53 18.54 +01 14 57.9           ~ 467 0
8 GAL 045.5+00.0 HII 19 14 20.8 +11 09 04           ~ 138 0
9 [GPD88] 045.454+0.060 HII 19 14 21.3 +11 09 13           ~ 150 1
10 NAME Cygnus 2N HII 20 21 44.1 +37 26 40           ~ 110 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 1998A&A...332..695H and select 'bookmark this link' or equivalent in the popup menu


2020.10.24-03:26:17

© Université de Strasbourg/CNRS

    • Contact