IC 2163. This system is somewhat puzzling in that there is significant
emission to the west of the center of the western galaxy in the pair. In
addition, the peak flux generally appears to occur between the
galaxies. It is notable that the reconstructed IRAS beam is
unfortunately elongated at nearly the same position angle as the two
galaxies, and hence the irregular beam is confusing the location of the
Pair [with NGC 2207]
Oct 8/9, 1978
103aO + GG385
The pair is clearly interacting, based both
on the morphological distortion of IC 2163 (note
the outward sweep on one side of the spiral
pattern) and on the near equality of the redshifts.
The redshifts derived from the Huchtmeier/Richter
Catalog (1989) are v_o(2207) = 2597 km/s
and v_o(2163) = 2418 km/s.
The angular separation of the centers of the
pair is 1.5'. At the mean redshift distance of 50
Mpc (H = 50), the projected linear separation is
small, at 22 kpc. However, it may be that the true
separation is larger than this, and that the
separation is mostly in the line of sight. The plane
of NGC 2207 may be warped, but because the
image is nearly face on, the warp, if present,
would not be visible.
Note that although IC 2163 shows evidence
of tidal distortion, NGC 2207 does not. This
point illustrates that interaction cannot be
judged by morphological distortion, at least in
PGC 018751 = IC 2163. Delete B_T_ and all colors. B^o^_T_ = 11.43, HI =
Small overexposed center in short bright bar, patchy (r'): 0.6 x 0.5.
Patchy tail leads to cE1: 1.9 north-following-following. Superposed
on NGC 2207; no dimensions possible.
=ESO 556-IG 09
interacting with ESO 556-IG 08
Forms an interacting pair with NGC 2207 at 1.4 arcmin.
= IC 2163
SB(rs)c pec (RC1)
patchy spiral arcs;
long, broad streamer toward northeast, small red condensation at the tip;
paired with NGC 2207 = UGCA 124, contact, streamer
Interacting pair with NGC 2207 at 1.4 arcmin.