Probing the magnetic field of the nearby galaxy pair Arp 269
  We present a multiwavelength radio study of the nearby galaxy pair Arp 269
(NGC 4490/85). High sensitivity to extended structures gained by using the
merged interferometric and single- dish maps allowed us to reveal a previously
undiscovered extension of the radio continuum emission. Its direction is
significantly different from that of the neutral gas tail, suggesting that
different physical processes might be involved in their creation. The
population of radio- emitting electrons is generally young, signifying an
ongoing, vigorous star formation -- this claim is supported by strong magnetic
fields (over 20 {\mu}G), similar to the ones found in much larger spiral
galaxies. From the study of the spectral energy distribution, we conclude that
the electron population in the intergalactic bridge between member galaxies
originates from the disc areas, and therefore its age (approximately 3.7--16.9
Myr, depending on the model used) reflects the time-scale of the interaction.
We have also discovered an angularly near compact steep source -- which is a
member of a different galaxy pair -- at a redshift of approximately 0.125.
