2003ApJ...591L..41R

Query : 2003ApJ...591L..41R

2003ApJ...591L..41R - Astrophys. J., 591, L41-L44 (2003/July-1)

Enhanced deuterium fractionation in dense interstellar cores resulting from multiply deuterated H+3.

ROBERTS H., HERBST E. and MILLAR T.J.

Abstract (from CDS):

In this Letter, we present the first results from updated models of interstellar deuterium chemistry that now include all possible deuterated isotopomers of H+3. We find that in regions of high density and heavy depletion, such as prestellar cores, the inclusion of HD+2and D+3 enhances the fractionation of ionic and neutral species significantly. Our models are the first to predict the very high atomic D/H ratios (≥0.3) necessary for grain-surface chemistry models to reproduce the high formaldehyde and methanol fractionation seen in star-forming regions.

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Journal keyword(s): ISM: Clouds - ISM: Individual: Alphanumeric: L1544 - ISM: Molecules - Molecular Processes

Simbad objects: 8

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Number of rows : 8
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 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 770 1
2 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 489 0
3 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 625 0
4 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 350 0
5 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
6 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 437 1
7 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 799 1
8 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1

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