Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...458..163t&link_type=abstract
Astronomy and Astrophysics, Volume 458, Issue 1, October IV 2006, pp.163-171
Astronomy and Astrophysics
Astrophysics
2
Ism: Clouds, Galaxy: Kinematics And Dynamics, Radio Lines: Ism
Scientific paper
Aims.We look for radio-continuum and atomic neutral hydrogen (Hi) counterparts of the IRAS Vela shell (IVS). Methods: .Neutral hydrogen (Hi) and 1410 MHz radio continuum surveys carried out with the Instituto Argentino de Radioastronomía (IAR) dishes are the main databases used in this investigation. Results: .A good morphological correlation was found between arc-shaped structures at radio wavelengths and in the 100 μm IR emission. This correlation is observed at velocities of the Hi between -17.5 and -2.1 km s-1, in agreement with the velocities of the molecular gas detected in the region. The radial distribution of the different components is consistent with the presence of an expanding shell that is being ionized from inside. Assuming a distance of 400 pc, the amount of ionized and atomic gas associated with the IVS is 2.3 × 104 and 6.8 × 104 solar masses, respectively. The origin of the expansion of the IVS could not be identified.
Arnal Marcelo E.
Bajaja Esteban
Morras Ricardo
Poppel W. G. L.
Reich Patricia
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