Volume 454, Number 2, August I 2006
APEX Special Booklet
|Page(s)||L111 - L114|
|Published online||11 July 2006|
Letter to the Editor
APEX CO(3–2) observations of NGC 6822
Astronomical Observatory, Ghent University, Krijgslaan 289 – S9, 9000 Ghent, Belgium e-mail: [Sven.DeRijcke;Pieter.Buyle]@UGent.be
2 Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
3 ESO, Casilla 19001, Santiago 19, Chile
4 University of Nottingham, University Park, Nottingham NG7 2RD, UK
Accepted: 1 June 2006
We observed the 12CO() 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 K enabled us to achieve detections in 4 single pointings and in a high spatial resolution 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 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.
Key words: galaxies: individual: NGC 6822 / galaxies: ISM / telescopes
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.