NGC 4402. This is a second edge-on Virgo spiral (i= 75^deg^); however, its
optical appearance differs from NGC 4388 as it has a prominent dust lane curving
through it. Once again it has three submillimetre peaks, with the central one
the brightest, closely followed by the eastern, and then finally the western
peak, which is barely recognizable as above the disc emission.
4.4 NGC 4402 The CO intensity distribution shows a high density nuclear
disk of radius ~ 10", which is surrounded by a more broadly distributed
molecular disk with arm structures. The PVD and RC shows steeply rising
nuclear rotation, followed by a gradually rising outer disk rotation.
The SMD indicates a sharp peak at the center, suggesting a massive core
with small scale radius, while the present resolution is not
sufficient. It is then surrounded by a bulge and disk components.
6.5 NGC 4402 The CO intensity distribution shows a high density nuclear
molecular disk of r~10". The nuclear disk is surrounded by a more
extended molecular disk of radius ~30"(2 kpc). This outer disk appears
to be consisting of two spiral arms, one extends to the west from the
southern edge of the nuclear disk, tracing the dark lane, and the other
arm toward the east from the north-eastern edge of the nuclear disk.
The velocity field shows a usual spider diagram superposed by some
streaming motion in the molecular ring/arms. The PV diagram shows a
nuclear component and outer ring/arms.
= Holm 403d
Non-interacting pair with NGC 4406 at 10 arcmin
Astrofizika, 2, 53, 1966.
IAU Symp. No.29, p.398, 1968.
= Holm 403d
Non-interacting pair with NGC 4406 at 10 arcmin.
Strong, complex, curved dark lanes. Classification difficult; possible I0?
Very faint; 3' x 0.5' in p.a. 88^deg^; a patchy, irregular, edgewise spiral with
an irregular dark lane down the middle. See Abs. Eff.