Recent focus on the importance of cold, unshocked gas accretion in galaxy formation - not explicitly included in semi-analytic studies - motivates the following detailed comparison between two inherently different modelling techniques: direct hydrodynamical simulation and semi-analytic modelling. By analysing the physical assumptions built into the

Aims: NGC 2992 is an intermediate Seyfert 1 galaxy showing outflows on kilo parsec scales which might be due either to AGN or starburst activity. We therefore aim at investigating its central region for a putative starburst in the past and its connection to the AGN and the outflows. Methods: Observations were performed with the adaptive optics near

In the notes to Table 1, a unit conversion was incorrect. The text should read 1 MJ Gyr-1 = 6.02e+13 g s-1. As a consequence in the 3rd paragraph of Sect. 3, the mass loss taking place in τ Boo b should be dot M_X = 0.011 MJ Gyr-1 for ρ = 1 g cm-3, or dot M_X = 3.4 M⊕ Gyr-1 in Earth mass units. Independently, the values of “log F_X accumulated”, in

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We present the results of a program of K- and KS-band imaging of a sample of 2Jy radio galaxies with redshifts 0.03

Inversions of spectropolarimetric observations of penumbral filaments deliver the stratification of different physical quantities in an optical depth scale. However, without establishing a geometrical height scale, their three-dimensional geometrical structure cannot be derived. This is crucial in understanding the correct spatial variation of