1998ApJ...506..743B

Query : 1998ApJ...506..743B

1998ApJ...506..743B - Astrophys. J., 506, 743-757 (1998/October-3)

Dense cores in dark clouds. XI. A survey for N2H+, C3H2, and CCS.

BENSON P.J., CASELLI P. and MYERS P.C.

Abstract (from CDS):

We have used the 3 mm receiver and upgraded antenna of Haystack Observatory to make high spatial and spectral resolution observations of lines of N2H+ and C3H2 in 60 dense cores. Both species are detected in most of the cores, and the velocities, and line widths are well correlated. This suggests that ions and neutrals are well coupled. We found v_D,max_ ≤ 0.03 km.s–1, which is the first observational constraint on the relative speed of ions and neutrals in star-forming dense cores. Twenty of the cores were also observed in the JN = 43-32 line of CCS. From our N2H+ observations, the fractional abundance of the molecular nitrogen N2 is found to be ≃7x10–5, consistent with all the nitrogen being in molecular form and not depleted onto dust grains.

Abstract Copyright: ∼

Journal keyword(s): ISM: Clouds - ISM: Molecules - Line: Profiles - Radio Lines: ISM

CDS comments: Table 1: Some objects, part of a largest object, are not in SIMBAD. Objects ending by (IR) are IRAS sources.

Simbad objects: 66

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Number of rows : 66
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 [LMG94] Per 4 PoC 03 29 18.0 +31 27 31           ~ 10 0
2 IRAS 03267+3128 cor 03 29 51.82 +31 39 06.0           ~ 58 0
3 [LMG94] Per 6 PoC 03 30 14.9 +30 22 48           ~ 13 0
4 [LMG94] Per 7 PoC 03 32 45.1 +30 59 56           ~ 10 0
5 [LMG94] Per 9 PoC 03 33 16.5 +31 20 18           ~ 6 0
6 NAME [BM89] B5 DNe 03 47 38.3 +32 52 43           ~ 224 0
7 LDN 1471 DNe 03 48.0 +32 54           ~ 349 0
8 LDN 1389 MoC 04 04 38 +56 56.2           ~ 99 0
9 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 238 0
10 LDN 1400K DNe 04 10 48.6 +54 53 14           ~ 32 0
11 NAME [BM89] L1498 PoC 04 10 51.4 +25 09 58           ~ 187 0
12 LDN 1498 DNe 04 11.0 +24 58           ~ 306 0
13 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 172 0
14 LDN 1495 DNe 04 18.1 +27 37           ~ 408 1
15 LDN 1400G DNe 04 25 10.5 +54 19 11           ~ 22 0
16 JCMTSF J043155.5+243254 PoC 04 31 55.9 +24 32 49           ~ 42 0
17 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 283 0
18 NAME [BM89] TMC-2 PoC 04 32 44.7 +24 25 13           ~ 188 0
19 LDN 1536 DNe 04 33 24.6 +22 43 29           ~ 114 0
20 LDN 1527 DNe 04 39 53 +25 45.0           ~ 689 0
21 Barnard 220 DNe 04 41 38.8 +26 00 42           ~ 141 0
22 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
23 LDN 1534 DNe 04 41 46 +25 41.4           ~ 45 0
24 NAME [BM89] L1517B cor 04 55 18.8 +30 38 04           ~ 163 0
25 LDN 1512 MoC 05 04 09.7 +32 43 09           ~ 184 0
26 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
27 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 437 1
28 NAME [BM89] L1582A DNe 05 31 18.4 +12 30 31           ~ 33 0
29 JCMTSF J054429.8+090856 DNe 05 44 30 +09 08.8           ~ 22 0
30 LDN 134A DNe 15 53 36.4 -04 35 26           ~ 49 0
31 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 799 1
32 LDN 1681B DNe 16 27 35.7 -24 43 26           ~ 27 0
33 NAME Ophiuchus D MoC 16 28 29.2 -24 18 25           ~ 122 0
34 LDN 43E DNe 16 34 37.5 -15 47 01           ~ 19 0
35 LDN 260 DNe 16 46 58.2 -09 36 20           ~ 43 0
36 LDN 158 DNe 16 47 50 -14 05.3           ~ 33 0
37 LDN 234E DNe 16 48 04.5 -10 56 58           ~ 26 0
38 LDN 234A DNe 16 48 06.9 -10 51 48           ~ 23 0
39 LDN 63 DNe 16 50 15.5 -18 06 06           ~ 76 0
40 LDN 57 DNe 17 22 38.2 -23 49 34           ~ 336 1
41 LDN 483 DNe 18 17 35 -04 39.8           ~ 359 0
42 LDN 531 DNe 19 06 10.0 -06 53 45           ~ 67 0
43 LDN 778 DNe 19 26 32.5 +23 58 42           ~ 51 1
44 LDN 663 DNe 19 36 55 +07 34.4           ~ 698 0
45 IRAS 19345+0727 cor 19 37 00.7 +07 34 08           ~ 96 0
46 IRAS 20353+6742 Y*O 20 35 46.325 +67 53 02.00           ~ 39 0
47 LDN 1152 DNe 20 35 50.2 +67 54 22           ~ 73 0
48 LDN 1155C DNe 20 43 18.1 +67 50 36           ~ 30 0
49 NAME [BM89] L1082C DNe 20 51 27.4 +60 19 00           ~ 33 0
50 LDN 1082A DNe 20 53 29.6 +60 14 40           ~ 43 1
51 LDN 1228D DNe 20 57 09.6 +77 35 41           ~ 2 0
52 IRAS 20582+7724 Y*O 20 57 12.9250225656 +77 35 43.656301932           ~ 119 0
53 LDN 1228 DNe 20 57 13 +77 35.8           ~ 131 0
54 LDN 1174 DNe 21 00 22.4 +68 12 53           ~ 66 0
55 IRAS 21017+6742 Y*O 21 02 21.23 +67 54 20.2           ~ 35 1
56 LDN 1172A DNe 21 02 27.7 +67 54 08           ~ 24 0
57 LDN 970 DNe 21 12 13.1 +47 23 23           ~ 67 0
58 LDN 1031C DNe 21 46 17.7 +47 18 54           ~ 7 0
59 LDN 1031B DNe 21 47 25.7 +47 32 09           ~ 22 0
60 LDN 1221 DNe 22 28 02.9 +69 01 13           ~ 51 0
61 IRAS 22290+7458 Y*O 22 29 59.537 +75 14 04.41           ~ 27 1
62 LDN 1251A DNe 22 30 31.8 +75 14 17           ~ 76 2
63 LDN 1251C DNe 22 35 40.0 +75 18 06           ~ 22 1
64 LDN 1251E DNe 22 39 18.3 +75 14 31           ~ 18 0
65 LDN 1262A DNe 23 25 29.6 +74 18 15           ~ 18 0
66 PSCz Q23238+7401 Y*O 23 25 46.65 +74 17 37.2           ~ 61 1

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