  Passive spiral galaxies - unusual galaxies with spiral morphologies but
without any sign of on-going star formation - have recently been shown to exist
preferentially in cluster infalling regions. This discovery directly connects
passive spiral galaxies to cluster galaxy evolution studies, such as the
Butcher-Oemler effect or the morphology-density relation. Thus, detailed study
of passive spiral galaxies could potentially yield new insight on the
underlying physical mechanisms governing cluster galaxy evolution.
  However, in previous work, passive spiral galaxies were selected from
low-resolution optical images with $\sim$1.5 arcsec seeing. Passive spirals
could therefore be mis-identified as S0 galaxies, or as dusty-starburst
galaxies which are not passive at all. To address this issue we performed deep,
high-resolution, near-infrared imaging of 32 passive spiral galaxies with
UKIRT.
