NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-25 T04:36:15 PDT
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Notes for object NGC 2781

4 note(s) found in NED.


1. 2005MNRAS.362.1319L
Re:NGC 2781
NGC 2781. This is classified as a weakly barred galaxy in RC3. Characteristic
for this galaxy is an extremely faint outer disc and elliptical structures at
the distances of r< 45 arcsec and r< 10 arcsec from the galaxy centre. Both
elliptical structures are visible as minima in the q profile and as intensity
maxima in the Fourier analysis. The unsharp mask (Fig. 5) shows that the smaller
structure is actually an inner disc with a two-armed spiral. The outer
elliptical is most probably a bar, but does not have the typical rectangular
shape of a classical bar, usually associated with a small axial ratio (in this
case q= 0.52). Both the inner and outer elliptical structures deviate 15{degree}
from the orientation of the outer disc.

2. 1994CAG1..B...0000S
Re:NGC 2781
Sa(r)
(I,L,1/3)
CD-653-Br
Jan 5/6, 1979
103aO + GG385
45 min
The common features shared by NGC 2781
with the preceding three galaxies on this page are
(1) an internal set of tight, inner spiral arms that
are almost a ring but are broken into a spiral
pattern, (2) a set of very faint outer arms, and
(3) a high symmetry to the pattern. NGC 2781 is
remarkably similar to NGC 1079 (at the left) in
most of these features.
The inner set of high-surface-brightness
arms nearly overlap one another after half a
revolution. They are nearly burned out in this
print. On the original plate they show knots that
are probably HII regions. Considerable dust, not
visible on this print, is present in the inner arms.
The inner arms can be traced a full 180 deg until
each nearly meets its companion arm on its way
out, a feature not present in the inner arms of
NGC 1079 because the wrap is not nearly as
extensive. But the feature of a nearly complete
broken ring (i.e., the 180 deg wrap) is highly visible
in the inner arms of NGC 6935 and NGC 4454,
similar in this feature to all galaxies on this page.
The set of two symmetrical outer arms is
similar to those in NGC 1079. The rate of recent
star formation in these arms is higher than in
NGC 1079. The slight difference between the two
galaxies in the degree of resolution into HII
regions shows the progression along the Sa
sequence.

3. 1968MCG4..C...0000V
Re:MCG -02-24-002
Type:
Hub - SBa
vdB - Sb+ II-III
Morg - kD5 very weak outer ring,
deV - SAB(r)0+

4. 1964RC1...C...0000d
Re:NGC 2781
Very small, bright nucleus. Weak bar. (r): 1.0 arcmin x 0.35 arcmin.
Dimensions for bright part only.
POSS shows a faint (R): 3.3 arcmin x 1.2 arcmin.


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