Petite AGNs Reveal New Secrets
The strength of the silicate dust emission feature in many of the low-luminosity AGN (denoted S10, the black circles), is unusually large compared to the amount of gas in their nucleus (measured by log NH). One possible explanation is that these galaxies harbour just a small amount of optically-thin dust, which is expected according to some models that predict the disappearance of the dusty torus in low-luminosity AGN.
Créditos:International Gemini Observatory/NOIRLab/NSF/AURA
About the Image
Id: | geminiann12008b |
Tipo: | Chart |
Release date: | 6 de Julio de 2012 a las 13:53 |
Related announcements: | geminiann12008 |
Size: | 500 x 380 px |
Sobre el Objeto
Categoría: | Illustrations |