1999ApJS..122..519C


Query : 1999ApJS..122..519C

1999ApJS..122..519C - Astrophys. J., Suppl. Ser., 122, 519-556 (1999/June-0)

Berkeley-Illinois-Maryland association survey of protostellar collapse candidates in HCO+ and HCN lines.

CHOI M., PANIS J.-F. and EVANS II N.J.

Abstract (from CDS):

We observed protostellar collapse candidates in the λ=3.4 mm continuum, the HCO+ J=1⟶0 line, and the HCN J=1⟶0 line using the Berkeley-Illinois-Maryland Association interferometer. Regions observed are NGC 1333 IRAS 4, L1527, HH 25 MMS, IRAS 16293-2422, Serpens SMM 4/2, B335, IRAS 20050+2720, and L1157. These sources were selected from their infall signature (blue-skewed line profile) in a single-dish survey of class 0 sources (Gregersen et al.). In our HCO+ and HCN spectra, most of the sources show the blueshifted side stronger than the redshifted side, which is consistent with the selection criteria. IRAS 16293 and IRAS 20050B line profiles are more complicated than a simple blue-skewed profile. Serpens SMM 2 shows symmetric, single-peaked line profiles. Most of the sources in our survey drive molecular outflows. We found that NGC 1333 IRAS 4A/B, L1527, B335, and L1157 are strong cases for protostellar collapse with relatively simple structures suitable for detailed study. The HCN spectrum toward IRAS 16293 shows that its infall signature from other molecular lines needs careful interpretation. HH 25 MMS, Serpens SMM 2-4, and IRAS 20050A/B are embedded in clouds with complex structure and prone to confusion.

Abstract Copyright:

Journal keyword(s): ISM: Jets and Outflows - ISM: Molecules - ISM: Structure - Radio Continuum: ISM - Radio Lines: ISM - Surveys

Nomenclature: Fig.9, Table 3: [CED93] 4E N=1 added. Fig.16, Table 3: [CPE99] IRAS 20050+2720 A (Nos A-D).

CDS comments: Fig.2: Sources A, B, C are respectively [JCC87] IRAS 4A, [JCC87] IRAS 4B, and [JCC87] IRAS 4B2, in SIMBAD.

Simbad objects: 22

goto Full paper

goto View the references in ADS

Number of rows : 22
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3857 3
2 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 684 1
3 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 477 0
4 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 588 0
5 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 910 1
6 LDN 1527 DNe 04 39 53 +25 45.0           ~ 584 0
7 NAME HH 25MMS Y*O 05 46 07.8 -00 13 41           ~ 59 0
8 2E 1624.5-2520 X 16 27 37.1 -25 26 49           ~ 1 0
9 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1192 1
10 87GB 175038.8+093017 Rad 17 53 01 +09 29.7           ~ 1 0
11 NAME Serpens SMM 4 cor 18 29 57.1 +01 13 15           ~ 134 0
12 [CED93] 4E smm 18 29 58.1 +01 13 15           ~ 2 0
13 JCMTSE J183000.2+011251 Y*O 18 30 00.4 +01 12 50           ~ 53 0
14 LDN 663 DNe 19 36 55 +07 34.4           ~ 612 0
15 IRAS 20050+2720 Y*O 20 07 06.549 +27 28 49.10           ~ 104 0
16 [BDB2003] G065.78-02.61 Cl* 20 07 06.7 +27 28 59           ~ 5 0
17 NAME IRAS 20050+2720 Cluster Cl* 20 07 06.7 +27 28 53           ~ 83 0
18 [CPE99] IRAS 20050+2720 C Rad 20 07 07.4 +27 28 27           ~ 1 0
19 [CPE99] IRAS 20050+2720 B Rad 20 07 07.6 +27 28 53           ~ 1 0
20 [CPE99] IRAS 20050+2720 D Rad 20 07 07.7 +27 28 08           ~ 1 0
21 QSO J2015+371 BLL 20 15 28.72978661 +37 10 59.5147372     21.82 21.4   ~ 272 2
22 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 549 0

To bookmark this query, right click on this link: simbad:objects in 1999ApJS..122..519C and select 'bookmark this link' or equivalent in the popup menu


2023.01.27-15:43:03

© Université de Strasbourg/CNRS

    • Contact