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Date and Time of the Query: 2019-04-25 T21:16:25 PDT
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Notes for object NGC 4580

8 note(s) found in NED.


1. 2006MNRAS.366..812C
Re:NGC 4580
This H{alpha} truncated disc displays little kinematical irregularities and a
small velocity gradient. Though the H{alpha} covers the innermost parts of the
stellar distribution like in NGC 4405, a constant velocity seems to be reached
along the major axis, which was not seen in NGC 4405. The H{alpha} morphology is
in the form of a pseudo-ring. No ionized gas is detected in the spiral arms that
can be seen in the broad-band images.

2. 2002ApJS..143...73E
Re:NGC 4580
NGC 4580.---S(r)b: Small circular bulge embedded in a
smooth inner disk. The edge of the inner disk is defined by a
prominent inner ring. The ring is formed by a pair of spiral
arms that break away after turned 180deg. Once past the ring,
the arms break up into a flocculent spiral.

3. 1994CAG1..B...0000S
Re:NGC 4580
Hubble Atlas, p. 21
Sc(s)/Sa
VCC 1730
H-2285-H
May 30/31, 1946
103aO
40 min
The negative print of NGC 4580 was made
from the same Mount Wilson 100-inch plate used
in the Hubble Atlas. The galaxy is similar to the
broken-inner-ring galaxies on panels 66 and 69,
of which NGC 4274 and NGC 6902 are the
prototypes. Here, as in those galaxies, the
near-ring is the overlapping of two tightly wound
arms that start on opposite sides of the bulge after
each has unwrapped by 180 deg. Outer arms begin
tangent to this inner near-ring. In NGC 4274
(panels 66, 88) and NGC 6902 (panel 69), these
outer arms are lumpy, showing evidence of recent
star formation.
The outer arms in NGC 4580 are smooth,
in stark contrast to the vigorous star formation
in the inner near-ring. This star formation in the
inner ring requires the type of the inner part of
NGC 4580 to be Sc. The smooth outer arms are
incompatible with this class. The mixed type of
Sc/Sa calls attention to the phenomenon. The
only other galaxies of this type in the RSA2 are
NGC 5665 and NGC 7679, also shown on this
page.

4. 1994CAG1..B...0000S
Re:NGC 4580
VCC 1730
Hubble Atlas, p. 21
Sc(s)/Sa
CD-2187-S
March 29/30, 1982
103aO
50 min
NGC 4580 has also been described and
illustrated in the Sa section on panel 86. The
smooth outer arms are similar to non-star-producing
arms in the early section of the Sa
types. The small nucleus, the lack of a central
bulge, and the obvious HII regions in the inner
ring, which is nearly complete, have the character
of the content of Sc galaxies.
NGC 4580 is one of the few galaxies in the
RSA having these mixed characteristics. The
unusual classification assigned here is to identify
the combination.

5. 1976RC2...C...0000d
Re:NGC 4580
Photometry and Isodensitometry:
Ap. J. Suppl., 26, No. 230, 1973.

6. 1973UGC...C...0000N
Re:UGC 07794
SAB(rs)a pec (de Vaucouleurs)

7. 1964RC1...C...0000d
Re:NGC 4580
Very small, bright nucleus. Traces of bar in a bright lens. Strong, knotty,
hexagonal (r): 0.55 arcmin x 0.4 arcmin. Smooth outer arms.
Lund 9 dimensions are for the bright part only.

8. 1961Hubbl.B...0000S
Re:NGC 4580
Sb
H-2285-H
May 30/31, 1946
103aO
40 min
Enlarged 12.1X
The internal "ring" in this galaxy must be very similar to
that in NGC 3705, but it is more easily seen here because NGC 4580
is more nearly face on. The ring is really two closely
coiled spiral arms of high surface brightness. The connections
that these arms make with the nucleus are not well defined
and cannot be traced. The arms appear to begin tangent to
the edge of the central lens. Three faint
external arms of smooth texture can be seen in the insert.
Two of the three arms are continuations of the inner ring
arms; the other comes off at a peculiar angle.


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