We investigate the [3.6]-[4.5] Spitzer-IRAC colour behaviour of the early-type galaxies of the SAURON survey, a representative sample of 48 nearby ellipticals and lenticulars. We investigate how this colour, which is unaffected by dust extinction, can be used to constrain the stellar populations in these galaxies. We find a tight relation between

Using a large sample of galaxies from the the seventh data release of the Sloan Digital Sky Survey (SDSS-DR7), we have analyzed the alignment of disk galaxies around cosmic voids. We have constructed a complete sample of cosmic voids (devoid of galaxies brighter than Mr - 5log h = -20.17) with radii larger than 10 h -1 Mpc up to redshift 0.12. Disk

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We present new, deep H I line and 20-cm radio-continuum data of the very puzzling blue compact dwarf galaxy NGC 5253, obtained with the Australia Telescope Compact Array as part of the 'Local Volume H I Survey' (LVHIS). Our low-resolution H I maps show, for the first time, the disturbed H I morphology that NGC 5253 possesses, including tails

Recent data from the VVV survey have strengthened evidence for a structural change in the Galactic bulge inward of |l|

We present here a theoretical model to account for the stellar initial mass function (IMF) as a result of the composite behaviour of the gas and dust distribution functions. Each of these has previously been modelled and the models tested against observations (Casuso & Beckman 2002, 2007, 2010). The model presented here implies a relation between