The LLAGN in the centre of the Galaxy

Abstract

The observations of FIR line and continuum spectra throughout the Galactic centre and in some regions of the disc are analysed in order to determine the physical conditions (densities, shock velocities, radiation parameters, etc.) and the relative abundances of some elements (C, N, and O). The models account for the coupled effect of photoionization and shocks. Consistent model calculations of the line and continuum spectra show that, although the radiation from the stars dominates, an active galactic nucleus (AGN) is clearly present, with a radiation maximum in the Sgr A* region. The flux, similar to that found for low luminosity AGN (LLAGN), is lower by a factor of about 100 than that of AGN.

11 pages, 8 figures, submitted to MNRAS

References in corpus (10)

• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• The 3rd IBIS/ISGRI soft gamma-ray survey catalog
• The Bolocam Galactic Plane Survey IV: 1.1 and 0.35 mm Dust Continuum Emission in the Galactic Center Region
• Spitzer IRS Observations of the Galactic Center: Shocked Gas in the Radio Arc Bubble
• The High-Density Ionized Gas in the Central Parsec of the Galaxy
• VERA 22 GHz fringe search survey
• Mapping photodissociation and shocks in the vicinity of Sgr A*
• Multiplicity of nuclear dust lanes and dust lane shocks in the Milky Way bar
• Spectra from the shocked nebulae revealing turbulence near the Galactic Centre
• Comparison of dust-to-gas ratios in luminous, ultraluminous, and hyperluminous infrared galaxies

Cited by in corpus (6)

• The Milky Way's Supermassive Black Hole: How good a case is it? A Challenge for Astrophysics & Philosophy of Science
• Non-Thermal Insights on Mass and Energy Flows Through the Galactic Centre and into the Fermi Bubbles
• CHANG-ES XX. High Resolution Radio Continuum Images of Edge-on Galaxies and their AGNs -- Data Release 3
• Evidences of merging in the Seyfert galaxy NGC 3393 revealed by modelling the spectra
• The merger Seyfert galaxy Arp 220. Line and continuum absorption and emission
• New Evidence for a Flux-independent Spectral Index of Sgr A* in the Near-infrared