Journal article
APEX CO(3–2) observations of NGC 6822
Astronomy and astrophysics (Berlin), Vol.454(2), pp.L111-L114
08/2006
DOI: 10.1051/0004-6361:20065411
Abstract
We observed the 12CO($3\rightarrow2$) emission of the emission-line regions Hubble I, Hubble V, Hubble X, Holmberg 18, and the stellar emission-line object S28 in NGC 6822 with the ESO Atacama Pathfinder Experiment (APEX) 12 m telescope as part of its science verification. The very low system temperature of $130{-}180$ K enabled us to achieve detections in 4 single pointings and in a high spatial resolution $70''\times 70''$ map of Hubble V. We compare the spectra with Hi observations, obtained with the Australia Telescope Compact Array, of the same regions. In combination with previous multi-line CO observations, we perform a preliminary investigation of the physical conditions in Hubble V using a simple LTE model. We estimate the mass of the Hubble V region and the H$_2/I_{\rm CO(3\rightarrow 2)}$ conversion factor. Also, we show that Hubble V is located very near the line-width versus size relation traced by the Milky Way and LMC molecular clouds.
Details
- Title: Subtitle
- APEX CO(3–2) observations of NGC 6822
- Creators
- S. De Rijcke - Ghent UniversityP. Buyle - Ghent UniversityJ. Cannon - Max Planck Institute for AstronomyF. Walter - Max Planck Institute for AstronomyA. Lundgren - European Southern ObservatoryD. Michielsen - University of NottinghamH. Dejonghe - Ghent University
- Resource Type
- Journal article
- Publication Details
- Astronomy and astrophysics (Berlin), Vol.454(2), pp.L111-L114
- Publisher
- EDP Sciences
- DOI
- 10.1051/0004-6361:20065411
- ISSN
- 0004-6361
- eISSN
- 1432-0746
- Number of pages
- 4
- Language
- English
- Date published
- 08/2006
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627253002771
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