2008A&A...488..559K


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.29CEST18:58:08

2008A&A...488..559K - Astronomy and Astrophysics, volume 488, 559-564 (2008/9-3)

An upper limit of gaseous water abundance in Chamaeleon-MMS1 as observed with ODIN.

KLOTZ A., HARJU J., RISTORCELLI I., JUVELA M., BOUDET N. and HAIKALA L.K.

Abstract (from CDS):

The determination of the gaseous water abundances in different intestellar environments is crucial for understanding the oxygen chemistry and its role in the molecular cloud evolution. The purpose of this study is to estimate water abundance in the protostellar core Cha-MMS1. The ground-state line of o-H20 at 557 GHz was observed with the ODIN telescope. Two observing runs performed in 2002 and 2003 resulted in an upper limit of TA=16mK. A model for the core density and temperature structure was constructed using a 1.3 mm continuum map from SEST/SIMBA. The water abundance profile through the cloud was derived and water line intensities expected from this model were calculated. An upper limit of 7x10–9 was derived for the average fractional o-H2O abundance (relative to H2). The non-detection is consistent with an abundance profile where a high fractional abundance (∼10–7) is reached in the low-density envelope of the core. According to our radiative transfer calculations, the detection of the 557GHz line from a quiescent core should severely be hampered by self-absorption. Therefore the present observations do not put hard contrainst on the H2O abundance.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: individual objects: Chamaeleon-MMS1 - ISM: abundances - stars: formation

Errata: erratum vol. 492, p. 767 (2008)

Status at CDS:  

Simbad objects: 16

goto Full paper

goto View the reference in ADS

Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 952 3
2 HH 922A HH 11 05 28.1 -77 49 10           ~ 2 0
3 HH 50 HH 11 05 49.6 -77 33 10           ~ 31 0
4 HH 49 HH 11 06 00.05 -77 33 36.0           ~ 34 0
5 HH 906 HH 11 06 11.1 -77 28 55           ~ 2 0
6 Ass Cha T 2-21 TT* 11 06 15.3485848381 -77 21 56.737939872   12.58 11.01   9.35 G5Ve 121 0
7 [RNC96] Cha-MMS 1a mm 11 06 31.7 -77 23 32           ~ 5 1
8 [PCW91] Ced 110 IRS 10 Y*O 11 06 33.38 -77 23 34.6           ~ 57 1
9 IRAS 11051-7706 Y*O 11 06 46.025 -77 22 29.67           ~ 70 0
10 [PMG2001] NIR 76 Y*? 11 06 46.580 -77 22 32.56           ~ 55 0
11 NAME Cha I MoC 11 06 48 -77 18.0           ~ 949 1
12 [PMG2001] NIR 89 Y*O 11 06 53.80 -77 23 59.9           ~ 5 0
13 HH 925A HH 11 07 04.7 -77 30 08           ~ 2 0
14 HH 924A HH 11 07 35.0 -77 12 16           ~ 2 0
15 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2979 0
16 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1018 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2008A&A...488..559K and select 'bookmark this link' or equivalent in the popup menu


2020.03.29-18:58:08

© Université de Strasbourg/CNRS

    • Contact