2004MNRAS.347..157C

Query : 2004MNRAS.347..157C

2004MNRAS.347..157C - Mon. Not. R. Astron. Soc., 347, 157-162 (2004/January-1)

Observational tests for grain chemistry: posterior isotopic labelling.

CHARNLEY S.B., EHRENFREUND P., MILLAR T.J., BOOGERT A.C.A., MARKWICK A.J., BUTNER H.M., RUITERKAMP R. and RODGERS S.D.

Abstract (from CDS):

We propose a series of detailed observations that should allow current ideas concerning the important catalytic pathways to interstellar molecules on interstellar dust grains to be tested. The atoms and molecules that accrete on cold grains and take part in surface reactions will be selectively fractionated in 13 C. Deeply embedded hot cores are surrounded by cold envelopes which still contain molecular ices that reflect the composition of the material evaporated into the hot gas. Recent Infrared Space Observatory observations of carbon dioxide ices towards embedded protostars have allowed the solid [12 C/13 C] ratio in CO2to be measured for the first time. We therefore now have a means to test theories of grain chemistry by comparing the isotopic signature of abundant ice molecules with that of species derived from them and which are only detectable in the gas - isotopic labelling a posteriori.

If atom addition reactions to solid CO and HCO are the origin of the organic molecules detected in hot molecular cores, these molecules should still possess the same [12 C/13 C] ratio. The theory that methanol ice is produced by reduction of CO ice can be tested by radio-astronomical observations of several protostellar sources with known [12 CO2/13 CO2]iceratios to see if the observed trend in [12 CO2/13 CO2]iceis reflected in [12 CH3OH/13 CH3OH]. We also critically discuss observations designed to elucidate the origin of solid OCS, as well as of many other larger organic molecules.


Abstract Copyright: 2004 RAS

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

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IRAS 23118+6110 Y*O 23 14 02.09473 +61 27 18.8460           ~ 385 0

Query : 2004MNRAS.347..157C

Basic data :
IRAS 23118+6110 -- Young Stellar Object
Other object types: otypes_help 		smm (JCMTSE,JCMTSF,...), IR (IRAS,IRCO,...), MIR (AKARI,MSX6C), out (2015MNRAS), Y*O (2015MNRAS), cor (2018MNRAS), G (2MASX)
ICRS coord. (ep=J2000) : 		23 14 02.09473 +61 27 18.8460 (Near-IR) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		23 11 53.21246 +61 10 57.8953 [ ]
Gal coord. (ep=J2000) : 		111.56784268 +00.75134019 [ ]
VLSR : 		-57.03 -58.23 -55.83 [0.08] (mm) 2018MNRAS.478.3693C
Angular size (arcmin): 		0.720 0.418 45 (NIR) C 2006AJ....131.1163S
Fluxes (3) :
J 17.060 [0.949] C 2006AJ....131.1163S
H 9.727 [0.048] C 2006AJ....131.1163S
K 7.664 [0.100] C 2006AJ....131.1163S
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Identifiers (13) :
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AKARI-IRC-V1 J2314016+612719 JCMTSF J231402.2+612721 NGC 7538E [WBN74] NGC 7538 IRS 9
IRAS 23118+6110 2MASX J23140209+6127188 SCOPE G111.57+00.75
IRCO 1151 MSX6C G111.5671+00.7517 [RW2005] SMM 60
JCMTSE J231402.2+612721 NAME NGC 7538 IRS 9 [WBG79] NGC 7538(E)

References (385 between 1850 and 2026) (Total 385)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 3    Distance : 2   

   

Observing logs
ISO : 16   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : IRAS 23118+6110

Link by name to the catalogue in VizieR :

AKARI-IRC-V1 J2314016+612719 IRAS 23118+6110 2MASX J23140209+6127188 MSX6C G111.5671+00.7517

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