NGC 4351 is a barred Sab-type galaxy that appears to be disturbed in the sense
that it is lopsided in the optical, being more extended on the western than
eastern side of the galaxy. There are no cataloged galaxies at a comparable
optical redshift within 15^'^ of the galaxy. At a spatial resolution of ~20 kpc,
the H I disk of NGC 4351 appears to be symmetric both spatially and
kinematically with no evidence for perturbations. At a spatial resolution of ~10
kpc (Fig. 16), the H I disk is asymmetric in that it is more prominent or
extended on the western side, just like in the optical.
The galaxy is slowly rotating. It has a peculiar gaseous morphology, showing an
arm-like structure to the North. The stellar distribution appears lopsided, also
with an arm-like structure in the northern and western regions of the galaxy.
The stellar asymmetry could result from a past tidal interaction, or even a
merger. This galaxy is also a very good candidate for an ongoing RPS (Koopmann &
= NGC 4354.
Photometry and Isodensitometry:
Ap. J. Suppl., 26, No. 230, 1973.
A.J., 77, 4, 1972.
P.A.S.P., 84, 589, 1972.
SA(s)ab: (de Vaucouleurs)
= NGC 4354