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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 308788.0, MPI für Astronomie / Publikationen_mpia
APEX CO(3-2) observations of NGC 6822
Authors:de Rijcke, S.; Buyle, P.; Cannon, J.; Walter, F.; Lundgren, A.; Michielsen, D.; Dejonghe, H.
Date of Publication (YYYY-MM-DD):2006
Journal Abbrev.:Astronomy and Astrophysics
Volume:454
Start Page:L111
End Page:L114
Audience:Not Specified
Abstract / Description:We observed the 12CO(3-->2) 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''× 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 H2/ICO(3--> 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.
Free Keywords:galaxies: individual: NGC 6822; galaxies: ISM; telescopes
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi...
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