NGC 0584. NGC 0584 has one certain physical companion, NGC 0580,
within the original 75 kpc search radius (Fig. 1). BS77 noted a second
optical companion. Visual inspection strongly suggests that the object,
2MASXi J0130541-064941 (diametrically opposite to NGC 0580 across the
central E galaxy) is also a physical companion based on its size,
proximity, and morphology. No redshift yet exists for this 2MASS object,
but follow-up studies of it would be useful.
Although NGC 0584 is the dominant member (in linear extent and
luminosity) of a small chain of galaxies, it is interesting to note that
all of the members with measured radial velocities have a positive
redshift with respect to NGC 0584, suggesting that the elliptical is not
the center of gravity of this grouping and that the velocities are
probing a wider potential. Similar comments apply to several other
groupings in this paper: All of the companions associated with NGC 1052
have negative radial velocities with respect to the elliptical under
study. NGC 4697 has five companions, NGC 3640 has eight companions, and
NGC 5322 has four companions, all of which have positive radial
velocities with respect to their associated elliptical.
Figure 3 shows the good agreement between our rotation and velocity
dispersion profiles and those obtained by Davies & Illingworth (1983)
along PA 63^deg^. 7Sam adopted a central velocity dispersion of 217 km
s^-1^ (raw data range between 215 and 245 km s^-1^) in good agreement
with our data reported in Table 1.
(S/I, rudimentary disk)
Aug 22/23, 1979
103aO + GG385
The outer envelope of NGC 584 is definite
but more subtle than in NGC 2784 or NGC 7302
on this panel. The envelope is the slightly tilted
(rudimentary disk?) feature on either side of the
central high-surface-brightness bulge. The major
axes of the bulge and of the outer envelope differ
in position angle by about 15 deg. The existence of
the tilted outer envelope with a typical S0 shallow
luminosity profile is beyond doubt, but subtle.
The E4 classification in the RC2, based on
Mount Wilson 100-inch plates, is not supported.
The Mount Wilson plates as well as the Las
Campanas plate used here show the S0
NGC 584: A disky object with very low contrast of the bulge, so that
the choice between diE (here adopted) and S0_1_(4) as in the RSA is
uncertain. There is no clear indication of the bar discussed in NBPS92.
= IC 1712
= Holm 045b (Holm 045c is a star)
= PKS 0129-07
In a group with IC 0127, NGC 0586, and NGC 0596.
Publ. Byurakan Obs. No. 42, 3, 1970.
Photometry: (10 Color):
Ap. J., 179, 731, 1973.
= IC 1712
= Holm 045b
Non-interacting pair with NGC 0586 at 4.3 arcmin.
(Holm 045c is a star).
Small, very bright, diffuse nucleus,
Ap. J., 71, 231, 1930.
Radio Source: (possible identification)
Austral. J. Phys., 11, 360.1958.
Type: Sand - E3, Hub - E4, Morg - kE4. Redshift: +1878, G5;
Cp'=0.87. Photometry: ApJ 71, 231, 1930. More under MCG -01-05-001.
584 Brightest member of a small cluster containing mostly E galaxies.
Quite bright, with strong central portion and a sharp nucleus; 2' long;
considerably elongated; no whorls visible.