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Date and Time of the Query: 2019-03-20 T14:35:09 PDT
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Notes for object NGC 6574

9 note(s) found in NED.


1. 1999ApJS..124..403S
Re:NGC 6574
5.19. NGC 6574
There is a prominent CO peak of 1 kpc diameter at the galactic
center. Two offset lanes extend from the central peak to east and west
(position angle ~ 105^deg^) to the two large gas clumps at about 2 kpc
(deprojected) from the galactic center. There are at least five gas
clumps around the nucleus, forming an apparent ring of molecular gas
that is associated with a ring of H II regions (Gonzalez Delgado et al.
1997). These features are on a smooth gas disk that extends out to a
radius of 4 kpc. Apparently the galaxy has a bar with a condensation of
gas at the center, a pair of offset gas lanes on the bar, and two large
gas clumps at the bar ends where spiral arms start. Similar gas
configuration is seen in barred galaxies (e.g., M83; Kenney & Lord
1991). The apparent ring of gas clumps (GMAs) and H II regions is
probably a pair of spiral arms starting from the bar ends. The
position-velocity map shows that the rotation curve steeply rises and
reaches a maximum within the central gas condensation. An emission
decrement at the systemic velocity in the position-velocity map is
suggestive of a cavity in the central gas clump (see Appendix A). The
central gas condensation is thus likely to be a ring, nuclear spirals,
or twin peaks structure at the inner Lindblad resonance caused by the
bar. The lack of significant noncircular motions in the velocity map may
be due to the large linear size of the beam (730 x 510 pc). The
molecular gas masses of the clumps are about 1 x 10^9^ M_sun_ for the
central condensation and 4 x 10^8^ M_sun_ and 9 x 10^8^ M_sun_ for the
clumps at the east and west ends of the bar, respectively. The gas
clumps on the pseudoring (or arms) have masses of 2-3 x 10^8^ M_sun_.

2. 1997ApJS..108..155G
Re:NGC 6574
The nucleus is quite faint, but a strong burst of star formation
surrounds the nucleus at a radius less than 2 kpc; 33 H II regions are
detected distributed in a ringlike structure.

3. 1996ApJS..103...81C
Re:NGC 6574
NGC 6574.--VLA D-configuration map at 4.86 GHz in Condon et al. (1995). VLA
A-configuration map of the core at 1.49 GHz in Vila et al. (1990).

4. 1996A&AS..115..439E
Re:NGC 6574
NGC 6574 has been mapped in the mm-continuum by Chini et al. (1995) with the
SEST and in the 6-cm continuum by Condon et al. (1991) with the VLA.

5. 1994CAG1..B...0000S
Re:NGC 6574
Sc(s)II
H-1403-H
July 31/Aug 1, 1932
Imp. Ecl.
60 min
Three principal arms exist in this more-or-less
grand design spiral. Two of the principal
arms are themselves double. Counting these as
separate arms yields four arm crossings of the
major axis on one side.
The redshift is v_o = 2415 km/s.

6. 1976RC2...C...0000d
Re:NGC 6574
Photograph:
Ap. J., 156, 501, 1969.
Spectrum, Rotation Curve, and Mass Determination:
Ap. J., 156, 501, 1969.
Ap. J., 184, 735, 1973.

7. 1964RC1...C...0000d
Re:NGC 6574
Small, bright, diffuse nucleus or bulge. Several massive, knotty arms with
some branches. Poorly resolved.
Heidelberg Veroff. Vol. 9, 1926 dimensions are for the bright part only.

8. 1956AJ.....61...97H
Re:NGC 6574
HMS Note No. 197
Absorption lines broad and faint.
Early-type continuum with H{gamma} and H{beta} present as
very faint, broad emission features.

9. 1918PLicO..13....9C
Re:NGC 6574
Moderately bright, slightly oval spiral 1' long. Whorls rather compact; almost
stellar nucleus. 6 s.n.


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