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Date and Time of the Query: 2019-05-24 T10:37:00 PDT
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Notes for object MESSIER 091

14 note(s) found in NED.


1. 2006MNRAS.366..812C
Re:NGC 4548
The observation has a very low initial S/N which causes the bin sizes to be
large during the Voronoi tessellation. The disc rotation is nevertheless seen,
with a velocity gradient of ~200 km s^-1^, which is in agreement with that
deduced from long-slit spectroscopy (Rubin et al. 1999).

2. 2004MNRAS.355.1251L
Re:NGC 4548
NGC 4548 (Fig. 8f, available in the online version). This is a galaxy
with a bar and spiral arms, but no inner ring attached at the radius of
the bar. The spiral arms start as arc-like structures at the two ends
of the bar and continue to form global spiral pattems. It seems that
the formation of the innerring is not yet completed. In this case, the
A_2_ amplitude profile is affected by the partial superposition of the
global spiral arms. This type of bar/spiral structure is quite typical
in the OSUBGS sample, being found also in NGC 150, 289, 864, 1832,
2566, 3261, 2548, 4579, 5493 and 4781. For this type of galaxy, it
would be valuable to apply the bar/spiral separation method (Buta et
al. 2003).
The two barred galaxies, NGC 7552 and 7479, are examples of systems
having a bar and prominent two-armed spirals.

3. 2004MNRAS.355.1251L
Re:NGC 4548
NGC 4548 (Fig. 8f, available in the online version). This is a galaxy with a bar
and spiral arms, but no inner ring attached at the radius of the bar. The spiral
arms start as arc-like structures at the two ends of the bar and continue to
form global spiral patterns. It seems that the formation of the inner ring is
not yet completed. In this case, the A2 amplitude profle is affected by the
partial superposition of the global spiral arms. This type of bar/spiral
structure is quite typical in the OSUBGS sample, being found also in NGC 150,
289, 864, 1832, 2566, 3261, 2548, 4579, 5493 and 4781. For this type of galaxy,
it would be valuable to apply the bar/spiral separation method (Buta et al.2003)
The two barred galaxies, NGC 7552 and 7479, are examples of systems
having a bar and prominent two-armed spirals.

4. 2003PASJ...55...59S
Re:NGC 4548
4.9 NGC 4548 CO gas is concentrated in the central few arcsec region,
and the intensity is weak. However, the PVD and RC show very high
rotation in the central several hundred parsecs. Accordingly, the SMD
shows a high-density central core, bulge and disk components.

5. 2003PASJ...55...17S
Re:NGC 4548
6.10 NGC 4548 This is a typical barred galaxy. CO emission is very weak
compared with the other galaxies. The CO distribution is highly
concentrated near the nucleus, being centrally peaked, and no extended
emission is detected. The recovered flux is only 16% of the FCRAO flux
with 45 beam (section 2.3), and the rest 84% (5.6K km s^-1^) could be
due to very extended components with sizes greater than our maximum
detectable size (54").

6. 2002ApJS..143...73E
Re:NGC 4548
NGC 4548.---SBab: Nuclear point source embedded in a slightly
elliptical bulge. Bulge has a clear isophotal twist of ~90deg from the
inner to the outer isophotes. Bulge is threaded by a prominent bar,
aligned with outer bulge P.A. There is an incomplete inner pseudoring
at the ends of the bar, formed by the inner parts of the spiral arms.
The arms do not begin at the bar ends, but more than 90deg before
that. After the arms wrap past the bar, the SE arm becomes very open
and quickly becomes diffuse. The NW arm is much more tightly wrapped
and remains prominent for much longer. The east arm has many more knots
in its inner part than the west arm. The outer disk is asymmetric,
with the SE side being higher surface brightness than the NW. The arm
structure splits into several armlets in the outer disk. Outer disk
isophotes are roughly aligned with the inner bulge isophotes (and
orthogonal to the outer bulge).

7. 2002AJ....124..675C
Re:UGC 07753
Diffuse radio source; the listed S(1.4 GHz) is from Condon (1987).

8. 2000AstL...26..285C
Re:NGC 4548
NGC 4548. One of the spiral arms contains well-defined rows bordered
by a thin dust lane on the inside.

9. 2000ApJ...542..186N
Re:NGC 4548
NGC 4548.-Hummel et al. (1987) find a 3 {sigma} upper limit of 2.5 mJy
at 20 cm, over the central 2" of their 1.3" resolution VLA map. Since we
detect a flux density of 1.2 mJy at 2 cm, the nonsimultaneous spectral
index of the core is {alpha}_2_^20^ >= -0.3.

10. 1997ApJS..108..155G
Re:NGC 4548
NGC 4548 shows a compact nucleus and nine H II regions in two spiral
arms.

11. 1976RC2...C...0000d
Re:NGC 4548
Non-interacting pair with NGC 4571 at 27 arcmin
Photometry:
Sov. A.J., 10, 34, 1966.
HII Regions:
Ap. J. Suppl., 27, No. 239, 1974.

12. 1973UGC...C...0000N
Re:UGC 07753
SB(rs)b (de Vaucouleurs), Sb+ (Holmberg)
12 33.2 +14 41 at 6.6, 141, 0.8 x 0.3, spiral, m=15.7

13. 1964RC1...C...0000d
Re:NGC 4548
Bright diffuse nucleus in strong bar: 1.7 arcmin x 0.3 arcmin (with a dark
lane). (r): 2.0 arcmin x 1.4 arcmin. Bright, partially resolved, filamentary
arms. Pseudo (R): 4.2 arcmin x 3.1 arcmin.
Non-interacting pair with NGC 4571 at 27 arcmin.
Heidelberg Veroff. Vol. 9, 1926 and Lund 9 dimensions bright part only.

14. 1961Hubbl.B...0000S
Re:NGC 4548
SBb(sr)
PH-914-S
103aO + WG2
Mar. 26/27, 1955
30 min
Enlarged 3.6X
The internal ring is not complete. The arms do not begin
at the ends of the bar as in NGC 1300 type systems but
start tangent to the amorphous central region about 90 degrees
from the termination of each end of the bar. The characteristic
absorption features are present in the bar but are not so
regular as in NGC 1300.


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