Date and Time of the Query: 2019-05-25 T05:02:15 PDT
Help | Comment | NED Home

Notes for object NGC 4612

9 note(s) found in NED.

1. 2006ApJS..164..334F
Re:VCC 1883
VCC 1883 (NGC 4612).This galaxy resembles VCC 355, in that is shows a dramatic
isophotal twist. In this case, however, there is no evidence of dust. The
presence of a bar is not quite as obvious as it is in the case of VCC 355, but
the galaxy isophotes become "stretched" at a distance of about 17" from the
center, as would be expected if a boxy, elongated component were superimposed to
the main body of the galaxy. The "ends" of the bar are visible, albeit barely,
in the individual images. The bar is misaligned with the main body of the
galaxy, producing a 40^deg^ change in the position angle of the major axis. A
stellar nucleus causes an inflection in the innermost 0.2" of the surface
brightness profile.

2. 2005MNRAS.364..283E
Re:NGC 4612
NGC 4612. All measurements are from MDM R-band images; these agree well with
measurements made using the R-band image of Frei et al. (1996).

3. 2004A&A...415..941E
Re:NGC 4612
NGC 4612 (inner disk): Erwin et al. (2004), based on Jungwiert et al.
(1997). All measurements, including outer-disk orientation, are from
an MDM R-band image, courtesy Paul Schechter; the outer-bar and
outer-disk measurements agree well with measurements made using the
R-band image of Frei et al. (1996), available via NED. Central velocity
dispersion is from Wegner et al. (2003).

4. 1997A&AS..125..479J
Re:NGC 4612
NGC 4612 (SB0+, 1"~120 pc, I=47.1^deg^)
The isophotes of this lenticular galaxy severely twist (
{delta}PA=48^deg^) between a=2" and a=15.7" where the ellipticity has a maximum
(e_max_=0.22). After deprojection (PA_disk_=145^deg^), the ellipticity has a
peak (e_max_=0.4) along which the PA is roughly constant while a small twist
({delta}PA=14^deg^) still exists within the innermost 10". We interpret the
profiles as resulting from the presence of a weak bar (we do not feel obvious
to classify the galaxy as strongly barred as it is in RC3).

5. 1994CAG1..B...0000S
Re:NGC 4612
VCC 1883
Hubble Atlas, p. 42
June 18/19, 1952
103aO + GG1
30 min
NGC 4612 is at the extreme eastern part of
the Virgo region surveyed for the Virgo Cluster
Catalog (Binggeli, Sandage, and Tammann
1985), and is not associated with the cores of
either Virgo subclusters A or B. Its redshift is v_o
= 1745 km/s.
The three luminosity zones characteristic of
S0 types are well seen in the insert. The outermost
two of the zones are seen in the main print.
The tilt of the major axis of the intermediate
region is about 45 deg from the major axis of the
outer envelope. This tilt is the feature necessitating
the SB0 classification, and defines the bar.
A very-low-surface-brightness outer ring is
visible on the original plate but is hardly visible
on the overprinted main print. The ring has the
same flattening and the same position angle of its
major axis as the outer envelope of the main
body. The identical flattening and orientation of
the ring and the disk show that the ring is a disk,
not a halo. It is the same feature seen in NGC
2685 (S0_3_ pec; Hubble Atlas, p. 7; panel 45
here). Semi-detached outer rings of this type are
present in several other galaxies on this and the
following panels.
In many of these cases, the luminosity in the
region between the outer edge of the disk and the
inner edge of the ring is lower than it would be
by an extension of the disk luminosity profile.
The effect is that parts of the ring look as if they
are detached from the outer edge of the disk. The
type example for this ring morphology and the
associated void region between it and the inner
disk is the Sab galaxy NGC 4736 (RSab; Hubble
Atlas, p. 16; panel 119 here), which has a
prominent ring. An SB0-type example is NGC
2859, shown on the following panel and in the
Hubble Atlas (p. 42).

6. 1976RC2...C...0000d
Re:NGC 4612
Ap. J., 146, 28, 1966.
Bull. A.A.S., 5, 349, 1973.

7. 1973UGC...C...0000N
Re:UGC 07850
(R)SAB0 (de Vaucouleurs)
Hints of (R) approximately 3. x 3.

8. 1964RC1...C...0000d
Re:NGC 4612
Small, very bright, diffuse nucleus in a diffuse bar: 0.6 arcmin x 0.2 arcmin
in a lens: 1.4 arcmin x 0.9 arcmin. Weak, smooth (R): 2.2 arcmin x 1.5 arcmin.
Heidelberg Veroff. Vol. 9, 1926 dimensions are for the lens only.

9. 1961Hubbl.B...0000S
Re:NGC 4612
Feb. 9/10, 1954
103aO + WG2
30 min
Enlarged 2.2X
This is a particularly good example of an SB01 galaxy, but
the features of the bar are so tenuous that very little shows
in the illustration. The pencil drawing below shows the
major features. The axis of the bar is inclined about 15 degrees
to the minor axis of the lens and of the external ring.
This ring is extremely faint and does not show at all in the
photograph; its position relative to four of the stars can
be found from the diagram.

Back to NED Home