2001ApJ...554..933S

Query : 2001ApJ...554..933S

2001ApJ...554..933S - Astrophys. J., 554, 933-947 (2001/June-3)

Deuterated ammonia in galactic protostellar cores.

SHAH R.Y. and WOOTTEN A.

Abstract (from CDS):

We report on a survey of NH2D toward protostellar cores in low-mass star formation and quiescent regions in the Galaxy. Twenty-three out of thirty-two observed sources have significant (≳5 σ) NH2D emission. Ion-molecule chemistry, which preferentially enhances deuterium in molecules above the local interstellar medium value value of 1.6x10–5, sufficiently explains these abundances. NH2D/NH3 ratios toward class 0 sources yields information about the ``fossil remnants'' from the era prior to the onset of core collapse and star formation. We compare our observations with predictions of gas-phase chemical networks.

Abstract Copyright: ∼

Journal keyword(s): ISM: Abundances - ISM: Clouds - ISM: General - ISM: Molecules - Molecular Processes - Radio Lines: ISM

CDS comments: Table 1: TMC-1-AM and TMC-1CY not in SIMBAD.

Simbad objects: 41

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Number of rows : 41
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 LDN 1448 DNe 03 22.5 +30 35           ~ 546 0
2 IRAS 03222+3034 Y*O 03 25 22.32 +30 45 13.9           ~ 164 0
3 LDN 1448NW Y*O 03 25 35.66 +30 45 34.2           ~ 80 0
4 SSTc2d J032536.4+304522 Y*O 03 25 36.49 +30 45 22.2           ~ 208 1
5 LDN 1448NA smm 03 25 36.49 +30 45 22.2           ~ 193 1
6 IRAS 03225+3034 IR 03 25 36.49 +30 45 22.2           ~ 165 1
7 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 266 1
8 IRAS F03226+3033 Y*O 03 25 38.83 +30 44 06.2           ~ 371 0
9 NAME NGC 1333 DCO+ Cld 03 26 06.6 +31 03 08           ~ 4 0
10 IRAS 03258+3104 Y*O 03 28 55.30 +31 14 27.8           ~ 173 1
11 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 513 3
12 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 770 1
13 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 489 0
14 [KJD2006] SMM J032917+31184 Y*O 03 29 11.3 +31 18 25           ~ 64 0
15 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 625 0
16 [JCC87] IRAS 4C Y*O 03 29 13.54 +31 13 58.2           ~ 122 1
17 IRAS 03282+3035 cor 03 31 20.98 +30 45 30.1           ~ 186 0
18 IRAS 03367+3147 IR 03 39 54.7 +31 57 10           ~ 8 0
19 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
20 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 823 1
21 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 900 0
22 TMC-1N MoC 04 41 21.3 +25 48 07           ~ 11 0
23 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
24 LDN 1512 MoC 05 04 09.7 +32 43 09           ~ 184 0
25 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
26 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 437 1
27 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
28 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 673 1
29 OMC 2 MoC 05 35 27 -05 10.1           ~ 475 1
30 HH 1 HH 05 36 20.8 -06 45 13           ~ 415 1
31 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
32 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 799 1
33 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 429 0
34 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
35 NAME rho Oph Cloud B1 PoC 16 27 10.5 -24 29 30           ~ 54 1
36 NAME rho Oph B2 Cloud PoC 16 27 27.9 -24 26 29           ~ 86 1
37 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1
38 LDN 1689N DNe 16 32 25.96 -24 28 46.2           ~ 121 0
39 LDN 63 DNe 16 50 15.5 -18 06 06           ~ 76 0
40 SH 2-68 N Y*O 18 29 48.09 +01 16 45.0           ~ 161 1
41 GCNM 23 Y*O 18 29 49.63 +01 15 21.9           ~ 291 2

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