Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2010-09-19
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
16 pages, 11 figures, 4 Tables. MNRAS, accepted
Scientific paper
The spectra emitted from clouds near the Galactic Centre are investigated calculating the UV-optical-IR lines using the physical parameters and the element abundances constrained by the fit of mid-IR observations. The characteristic line ratios are compared with those observed in active galaxies. We have found that the physical conditions in the nebulae near the GC are different from those of starburst galaxies and AGN, namely, gas velocities and densities as well as the photoionization fluxes are relatively low. The geometrical thickness of the emitting nebulae is particularly small suggesting that matter is strongly fragmented by instabilities leading to an underlying shock-generated turbulence.
Contini Marcella
Goldman Itzhak
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