  We present HI line and 20-cm radio continuum observations of the NGC 1511
galaxy group obtained with the Australia Telescope Compact Array. The data
reveal an extended, rather disturbed HI distribution for the peculiar starburst
galaxy NGC 1511 and a narrow bridge to its small companion galaxy, NGC 1511B,
which has been severely distorted by the interaction/collision between the two
galaxies. No stellar counterpart to the gaseous bridge has been detected. In
addition, we find that the peculiar optical ridge to the east of NGC 1511 is
probably the stellar remnant of a galaxy completed disrupted by interactions
with NGC 1511. The slightly more distant neighbour, NGC 1511A, shows a regular
HI velocity field and no obvious signs of interactions. Radio continuum
emission from NGC 1511 reveals three prominent sources on top of a more
diffuse, extended distribution. We derive an overall star formation rate of 7
Msun/yr. The most enhanced star formation is found in the south-eastern part of
the disk, coincident with several bright HII regions, and closest to the
peculiar optical ridge. No continuum emission was detected in the companions,
but NGC 1511B appears to show an HII region at its faint western edge, closest
to NGC 1511. The group displays a prime example of interaction-induced star
formation activity.
