NGC 1532 (HIPASS J0411-32) is a large spiral galaxy interacting with its
much smaller, elliptical companion NGC 1531. VLA H I measurements of
NGC 1531/2 by Sandage & Fomalont (1993) reveal a total H I extent of ~20'
(~70 kpc) and an integrated H I flux density of 228+-15 Jy km s^-1^,
similar to our value of 249+-15 Jy km s^-1^. For a study of the CO(1-0)
and CO(2-1) content of NGC 1532, see Horellou et al. (1995).
[Pair with NGC 1531]
Oct 27/28, 1981
103aD + GG495
The unusual plumes in NGC 1532 suggest a
tidal distortion due to an encounter. The evident
candidate responsible for the perturbation is the
amorphous companion NGC 1531, whose morphology
is of the same class as M82. The two
galaxies form a physical pair; the redshifts are
v_o(1531) = 1053 km/s and v_o(1532) = 1105 km/s.
Three dwarf candidate companions form a
wider physical group centered on the bright pair.
The most interesting of the companions is at RA
(1950) 4^h^ 10^m^ 56^s^, Dec (1950) = -33^deg^ 07'
36". It appears as a dwarf S0(8),N on a yellow
plate but as an Im with condensations on a blue
plate, similar to the transitional (Im-dE,N) case
of NGC 4286 (panel 20) (Sandage and Hoffman
1991). The low ratio of the hydrogen mass to
total mass also suggests that the dwarf is in
transition between Im and dE,N dwarf types
(Sandage and Fomalont 1993).
The other two dwarf candidate companions
are a high-surface-brightness SB0 (M = -19) at
RA (1950) 4^h^ 10^m^ 39^s^, Dec (1950) = -32^deg^ 56'
33", and a prototype faint dE0,N nucleated
dwarf elliptical at RA (1950) = 4^h^ 09^m^ 32^s^,
Dec (1950) = -32^deg^ 59' 09".
Overexposed center, dust lane, dist patchy arms with few knots.
Interacting pair with NGC 1531 at 1.7.
=ESO 359- G 27
*interacting with ESO 359-IG 26
*several small companions
Nearly on edge.
String of intense hot spots along one of the arms on the near side.
Dust lanes silhouetted against a small but definite central bulge.
Some evidence for interaction (tides) with NGC 1531.
Pair with NGC 1531 at 1.8 arcmin.
Discordant velocity Source N2 (Observatory, 87, 38, 1967) rejected.
Paired with NGC 1531 at 1.8 arcmin.
Drawing in Helwan 9.