2006ApJ...642..319D


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET07:03:37

2006ApJ...642..319D - Astrophys. J., 642, 319-329 (2006/May-1)

CCS and NH3Emission associated with low-mass young stellar objects.

DE GREGORIO-MONSALVO I., GOMEZ J.F., SUAREZ O., KUIPER T.B.H., RODRIGUEZ L.F. and JIMENEZ-BAILON E.

Abstract (from CDS):

In this work we present a sensitive and systematic single-dish survey of CCS emission (complemented with ammonia observations) at 1 cm, toward a sample of low- and intermediate-mass young star-forming regions known to harbor water maser emission, made with NASA's 70 m antenna at Robledo de Chavela, Spain. Out of the 40 star-forming regions surveyed in the CCS (21-10) line, only six low-mass sources show CCS emission: one transitional object between the prestellar and protostellar Class 0 phase (GF9-2), three Class 0 protostars (L1448-IRS3, L1448C, and B1-IRS), a Class I source (L1251A), and a young T Tauri star (NGC 2071 North). Since CCS is considered an ``early-time'' (≲105 yr) molecule, we explain these results by either proposing a revision of the classification of the age of NGC 2071 North and L1251A, or suggesting the possibility that the particular physical conditions and processes of each source affect the destruction/production of the CCS. No statistically significant relationship was found between the presence of CCS and parameters of the molecular outflows and their driving sources. Nevertheless, we found a significant relationship between the detectability of CCS and the ammonia peak intensity (higher in regions with CCS), but not with its integrated intensity. This tendency may suggest that the narrower ammonia line widths in the less turbulent medium associated with younger cores may compensate for the differences in ammonia peak intensity, rendering differences in integrated intensity negligible. From the CCS detection rate we derive a lifetime of this molecule of ≃(0.7-3)x104 yr in low-mass star-forming regions.

Abstract Copyright:

Journal keyword(s): Astrochemistry - ISM: Clouds - ISM: Evolution - ISM: Molecules - Stars: Formation - Stars: Pre-Main-Sequence

Simbad objects: 68

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Number of rows : 68

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LDN 1287 DNe 00 36 47.5 +63 29 02           ~ 83 0
2 GM 1-33 HH 00 36 47.5 +63 29 02           ~ 112 0
3 LDN 1448NW Y*O 03 25 35.66 +30 45 34.2           ~ 61 0
4 IRAS 03225+3034 IR 03 25 36.49 +30 45 22.2           ~ 150 1
5 LDN 1448NA smm 03 25 36.49 +30 45 22.2           ~ 173 1
6 SSTc2d J032536.4+304522 Y*O 03 25 36.49 +30 45 22.2           ~ 187 1
7 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 242 1
8 IRAS F03226+3033 Y*O 03 25 38.83 +30 44 06.2           ~ 304 0
9 NAME LDN 1455 IRS 1 cor 03 27 39.08 +30 13 03.1           ~ 143 0
10 IRAS 03258+3104 Y*O 03 28 55.30 +31 14 27.8           ~ 160 1
11 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 405 3
12 HH 6 HH 03 29 11.2 +31 18 34           ~ 63 0
13 [KJD2006] SMM J032917+31184 Y*O 03 29 11.3 +31 18 25           ~ 53 0
14 2MASS J03331667+3107548 Y*O 03 33 16.68 +31 07 54.9           ~ 103 2
15 Ass Per OB 2 As* 03 42.2 +33 26           ~ 309 0
16 NAME T Tau S ** 04 21 59.371 +19 32 05.95           K7 144 2
17 V* T Tau Or* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1258 2
18 IRAS 04361+2547 Y*O 04 39 13.89767 +25 53 20.6340           ~ 185 1
19 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 216 0
20 EM* StHA 49 Em* 05 36 20.275 -06 45 06.78     15     ~ 27 0
21 HH 1 HH 05 36 20.8 -06 45 13           ~ 401 1
22 NGC 1985 RNe 05 37 47.8 +31 59 24           ~ 130 2
23 Haro 4-255 Y*O 05 39 22.3406615735 -07 26 44.483472198   15 15.830   12.969 K0 94 0
24 NAME LDN 1641 S3 HII 05 39 56.1 -07 30 26           ~ 62 0
25 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 692 1
26 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1188 0
27 [MCK88] NGC 2024 FIR 5 cor 05 41 44.6 -01 55 38           ~ 91 0
28 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 286 1
29 IRAS 05413-0104 IR 05 43 51.5 -01 02 52           ~ 77 0
30 LDN 1594 Cld 05 44 29.8 +09 08 54           ~ 72 0
31 JCMTSF J054429.8+090856 DNe 05 44 29.8 +09 08 54           ~ 17 0
32 NAME HH 19-27 HH 05 46 09.5 -00 08 20           ~ 6 0
33 NAME HH 19-27 H2O Maser Mas 05 46 31.2 -00 02 35           ~ 7 0
34 NGC 2071 RNe 05 47 10 +00 18.0           ~ 611 1
35 NAME NGC 2071-North PoC 05 47 42.3 +00 38 40           ~ 15 0
36 IRAS 05451+0037 Y*O 05 47 45.0001927861 +00 38 41.915575069           ~ 27 0
37 IRAS 06291+0421 IR 06 31 48.48 +04 19 30.7           ~ 27 1
38 RAFGL 989 Y*O 06 41 10.1592954288 +09 29 33.635497596   17.4 16.8 18.26 17.28 B2 244 0
39 2MASS J07005094-0856301 Y*O 07 00 50.94 -08 56 30.2           ~ 30 0
40 [CB88] 54 MoC 07 04 21.2170 -16 23 15.000           ~ 43 0
41 IRAS 07020-1618 Y*O 07 04 21.566 -16 23 19.75           ~ 21 1
42 LDN 260 DNe 16 46 58.2 -09 36 20           ~ 41 0
43 2MASS J16465826-0935197 Y*O 16 46 58.267 -09 35 19.72   19.6 17.4     ~ 32 0
44 IRAS 18265+0028 cor 18 29 06.694 +00 30 31.24           ~ 16 0
45 NAME SH 2-68 FIR 1 cor 18 29 49.63 +01 15 21.9           ~ 238 2
46 [S2009] L723 XMM 8 * 19 17 53.1333789894 +19 12 16.410977926           ~ 38 0
47 NAME LDN 723-mm smm 19 17 53.70 +19 12 20.0           ~ 15 0
48 IRAS 20050+2720 Y*O 20 07 06.549 +27 28 49.10           ~ 100 0
49 NAME IRAS 20050+2720 Cluster Cl* 20 07 06.7 +27 28 53           ~ 83 0
50 NAME SH 2-106 FIR IR 20 27 25.4 +37 22 48           ~ 48 0
51 WSRTGP 2025+3712 HII 20 27 26.4 +37 22 48           ~ 48 0
52 NAME SH 2-106 IR Y*O 20 27 26.502 +37 22 42.03           ~ 157 1
53 HH 375 Y*O 20 39 06.2 +68 02 15           ~ 161 0
54 LDN 1082 DNe 20 51.1 +60 11           ~ 34 0
55 NAME GF 9-2 * 20 51 30.1 +60 18 39           ~ 20 1
56 LDN 970 DNe 21 12 13.1 +47 23 23           ~ 67 0
57 IRAS 21106+4712 mul 21 12 26.2 +47 24 24           ~ 19 0
58 TGU H534 P2 DNe 21 37 11.3100 +43 20 36.260           ~ 28 0
59 IRAS 21352+4307 Y*O 21 37 11.39 +43 20 38.4           ~ 16 1
60 [BGE2002] BIMA 2 Y*O 21 40 42.36 +58 16 09.7           ~ 115 0
61 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 182 1
62 LDN 1204A DNe 22 21 22.5 +63 51 13           ~ 91 0
63 LDN 1204B DNe 22 21 30.2 +63 36 23           ~ 26 0
64 LDN 1251A DNe 22 30 31.8 +75 14 17           ~ 71 2
65 IRAS 22343+7501 Y*O 22 35 24.425 +75 17 03.73     22.99 20.22 17.76 ~ 42 0
66 IRAS 22376+7455 TT* 22 38 42.5049825172 +75 11 45.482133719   17.65 16.10 14.90 13.62 M1.5 47 0
67 LDN 1251B DNe 22 38 46.79 +75 11 32.6           ~ 49 1
68 NAME Cep E HII 23 03 12.779 +61 42 25.75           ~ 156 0

    Equat.    Gal    SGal    Ecl

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2020.11.25-07:03:37

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