2001A&A...370..557V


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET05:16:33

2001A&A...370..557V - Astronomy and Astrophysics, volume 370, 557-569 (2001/5-1)

Interstellar oxygen chemistry.

VITI S., ROUEFF E., HARTQUIST T.W., PINEAU DES FORETS G. and WILLIAMS D.A.

Abstract (from CDS):

We present results of chemical models for a variety of types of regions shown by SWAS observations to contain less O2 and H2O than previously expected. We identify time-dependent models for which O2 and H2O abundances meet the SWAS constraints and for which calculated abundances of other species are in harmony with measurements made primarily at millimeter wavelengths. The phases of acceptable composition are transient in these time-dependent models but are of very substantial length in many models for which CO and N2 are assumed to be returned promptly and unaltered to the gas phase though other species, except for H2 and He, freeze-out onto the dust. We also consider whether the presence of bistability in some steady-state models can account for the SWAS and other observations.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: clouds - ISM: molecules

Simbad objects: 6

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Number of rows : 6

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 NAME Polaris Cirrus Cloud MoC 01 52 29.6 +87 40 31           ~ 71 0
2 TMC-1B PoC 04 41 13.2 +25 49 25           ~ 16 0
3 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1378 0
4 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11760 0
5 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1943 1
6 W 33a Y*O 18 14 39.0 -17 52 03           ~ 588 0

    Equat.    Gal    SGal    Ecl

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2020.10.26-05:16:33

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