2004A&A...421.1101O

Query : 2004A&A...421.1101O

2004A&A...421.1101O - Astronomy and Astrophysics, volume 4211101-1111 (2004/7-3)

On the possible interconversion between pairs of deuterated isotopomers of methanol, its ion, and its protonated ion in star-forming regions.

OSAMURA Y., ROBERTS H. and HERBST E.

Abstract (from CDS):

Deuterated isotopomers of methanol have been detected both in hot cores and in the protostellar source IRAS 16293-2422. It is currently thought that these species are formed on cold grain surfaces in a previous era by the hydrogenation and deuteration of CO via reactions with atomic H and D. Methanol and its singly, doubly, and multi-deuterated isotopomers then evaporate or are sputtered into the gas as star formation occurs. In studying the post-evaporative gas-phase chemistry of these isotopomers, it is important to know if pairs of isotopomers with D atoms in different places (e.g. CH₃OD and CH₂DOH) can be interconverted or whether they can be viewed as separate entities with depletion mechanisms that are independent of each other. Here we show that it is difficult to exchange protons and deuterons on the two different parts of the methanol backbone. It is then possible that CH₃OD can be destroyed on a much faster time scale than CH₂DOH, an explanation that may partially explain the relatively low abundance of the former in IRAS 16293-2422.

Abstract Copyright: ∼

Journal keyword(s): astrochemistry - molecular processes - ISM: abundances - ISM: molecules - ISM: individual: IRAS 16293-2422

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 16293-2422	cor	16 32 22.56	-24 28 31.8						~	1357	1

Query : 2004A&A...421.1101O

Basic data :

IRAS 16293-2422 -- Dense Core
Other object types:	`smm (2008ApJ,JCMTLSG,...)`, `IR (2013ApJS,HGBS,...)`, `MIR (SSTc2d,WISEA,...)`, `YO (2015MNRAS,[EES2009])`, `Y? (2015ApJS,[HL2013])`, `mm (2009ApJ,[YEE2006])`, `cor (2020A&A)`, `PoC ([FST86])`
ICRS coord. (ep=J2000) :	`16 32 22.56 -24 28 31.8 (Infrared) [ 300 300 90 ] C 2009ApJ...692..973E`
FK4 coord. (ep=B1950 eq=1950) :	`16 29 20.71 -24 22 11.7 [ 300 300 90 ]`
Gal coord. (ep=J2000) :	`353.93571 +15.84097 [ 300 300 90 ]`
Angular size (arcmin):	`0.35 0.13 136 (FIR) C` `2020A&A...638A..74L`

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`HGBS J163223.1-242836`	`NAME IRAS 16293`	`WISE J163222.62-242833.6`	`[JJK2008] SMM J163223-24284`
`IRAS 16293-2422`	`NAME rho Oph East`	`[EDJ2009] 1008`	`[NWA2006] SMM 20`
`JCMTLSG J163222.6-242833`	`SSTc2d J163222.6-242832`	`[EES2009] Oph-emb 2`	`[YEE2006] 37`
`JCMTSE J163222.8-242837`	`SSTc2d J163222.6-242831`	`[FST86] rho Oph E`
`JCMTSF J163222.8-242837`	`WISEA J163222.60-242833.6`	`[HL2013] 248.09427-24.47550`

References (1357 between 1850 and 2026) (Total 1357)
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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Data at NED - NASA/IPAC Extragalactic Database : IRAS 16293-2422

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IRAS 16293-2422 WISEA J163222.60-242833.6 WISE J163222.62-242833.6

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