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Notes for object NGC 6744

11 note(s) found in NED.


1. 2004AJ....128...16K
Re:NGC 6744
NGC 6744 (HIPASS J1909-63a) is one of the largest galaxies in the
southern sky. Using ATCA data, Ryder et al. (1999) measure a total H I
extent of ~30', about 1.5 times the size of the stellar disk. The two
late-type dwarf companions, NGC 6744A (located within the H I disk of
NGC 6744) and ESO 104-G044 (HIPASS J1911-64, at a projected distance of
24.2' from NGC 6744) also contain H I gas. We derive an H I mass of
2.2 x 10^10^ M_sun_, making NGC 6744 one of the most massive galaxies
within a distance of~25 Mpc.

2. 2003ApJS..146..353M
Re:NGC 6744
NGC 6744 (C)
Because the nucleus is near the corner of the H image, it is difficult
to make out much structure in the circumnuclear region. There are
several distinct dust features, but they form no coherent structure.

3. 2001MNRAS.324..580D
Re:[DBA2001] FN 140
FN140 This is the mixed spiral [SAB(r)bc] LINER NGC 6744 with a
heliocentric radial velocity of 841 +/- 5 km s^-1^. The region dominated
by the bar is very extended and quite clean of gas. Many knots are evident.
Two arms in particular contain a bunch of adjoining giant H II regions
where most of the massive star formation must currently be taking place.
NGC 6744, with F_1660_ = 8.95, is the brightest of the FAUST galaxies
observed in the NGC 6752 and the Antennae fields.

4. 1997A&AS..124...61B
Re:NGC 6744
This extended barred spiral galaxy is classified SAB(r)bc in RC3 and
Sbc(r)II/SBbc(r)II in RSA. This spiral galaxy has been included in our sample
of SB0 because the region dominated by the bar is very extended and quite clean
from gas. The results can be then easily compared with the more classical SB0
galaxies. The only kinematical data available for this galaxy are from HI
observations (Whiteoak & Gardner 1977). The HI offsets pointing along the major
axis shows the two-horned profile typical of spiral galaxies, a maximum of
~166 km s^-1^ is reached at 18 arcmin. Our measured stellar rotation curve, in
the central 3 arcmin, is in agreement with the HI data and reaches a maximum of
rotation of ~144 km s^-1^. No emission lines are visible in our green spectra,
but Veron-Cetty & Veron (1986) report the presence of [NII] and H{alpha}.

5. 1994CAG1..B...0000S
Re:NGC 6744
Sbc(r)II/SBbc(r)II
CD-1473-S/Br
May 10/11, 1980
103aO + GG385
45 min
This very large (the angular diameter
measured from the outermost arms is 18'), nearby
spiral is at low galactic latitude (b = -26^deg^),
making foreground field contamination by Galactic
stars apparent and the identification of any
particular individual resolved stars in the arms
uncertain.
But the resolved HII regions are more easily
identified. The largest of these have core-plus-halo
diameters of about 6". At the redshift distance
of 13 Mpc, based on the redshift of v_o = 663 km/s,
this corresponds to a linear diameter
of 385 psc, consistent with a calibration given
elsewhere (Sandage and Tammann 1974a).
The arm pattern is clearly multiple. The
outermost arm, out of the frame of this print,
overlaps the spindle ImIV galaxy at the lower-right
corner. This companion is highly resolved.
Its separation from NGC 6744 is 10.4'
northwest (the orientation of the print here is
north at the right, west at the bottom),
corresponding to a small projected linear separation
of 39 kpc.

6. 1993ApJS...88..415R
Re:NGC 6744
The delicate nature of its multitude of spiral arms make NGC 6744 one of
the prettiest galaxies in the whole sky. Although it spans some 16' in
diameter, we felt it so worthy of inclusion in our atlas that we elected
to attempt mosaicking. Three images, each overlapping the adjacent one by
50%, have been registered and appropriately scaled in intensity in order
to produce each of the mosaics, which cover a field of some 17.5' x
10.3'. The vignetted corners of the component images have been masked
out, and the H{alpha} and red continuum images are presented separately
to preserve a similar scale to the other images in this atlas. These
mosaics demonstrate the feasibility of the mosaicking technique, provided
a generous overlap is allowed for in the observations.
The area between the prominent bulge and the inner ring of H II regions
is virtually devoid of star formation activity. For all its grandeur,
NGC 6744 is apparently isolated in space and not associated with any
other group. Thus, this vacant area is most likely the result of an
orbital resonance sweeping the gas away and inhibiting any further
massive star formation. At least half a dozen major spiral arms project
tangentially from the inner ring before winding almost continuously all
the way out to the edge of the optical disk. Two arms in particular
contain a bunch of adjoining giant H II regions where most of the massive
star formation must currently be taking place. Despite the loose, tenuous
nature of the spiral arms, the H II regions are rather tightly confined
to, and aligned with these arms, even at their very ends. In his
isophotometry study, de Vaucouleurs (1963b) drew attention to a faint,
blue Im system apparently associated with the northwest extremity of a
possibly anomalous arm. Unfortunately, our mosaic does not quite extend
out far enough to show this object, but it would be interesting to search
for evidence of an interaction in the form of tidally enhanced star
formation.

7. 1985SGC...C...0000C
Re:NGC 6744
Plate 887
(r): 2.8 x 2.0, resolved, many knots.

8. 1982ESOU..C...0000L
Re:ESO 190501-6356.2
=ESO 104- G 42
prominent in group

9. 1979AJ.....84..472S
Re:NGC 6744
HII regions resolve at the 3-5 arcsec level.

10. 1976RC2...C...0000d
Re:NGC 6744
Description and Classification:
IAU Symp. No.29, 421, 1968.
J.R.A.S. Canada, 68, 117, 1974.
Photograph:
IAU Symp. No.38, 23, 1970.
Photometry:
Atlas Gal. Austr., 1968.
Radio Observations:
Australian J. Phys., 19, 883, 1966.

11. 1964RC1...C...0000d
Re:NGC 6744
Bright diffuse nucleus in a weak bar: 2.0 arcmin x 0.4 arcmin. Faint, broken
(r): 3.2 arcmin x 1.9 arcmin. Several filamentary, partially resolved arms.
Faint, outlying, irregular cloud: 1.6 arcmin x 0.4 arcmin north-preceding 10.5
arcmin at end of a very faint, anomalous arm.
See also M.N.R.A.S., 81, 601, 1921 and HB 914, 7, 1940.
HA 88,2 dimensions (9.0 arcmin x 9.0: arcmin. series a) are much too small;
they were rejected.
Uppsala 21 dimensions: (10 arcmin x 6 arcmin) are for the bright part only.
Photometry:
M.N.R.A.S., 112, 606, 1952.
Ap. J., 138, 934, 1963.
Radio Emission:
Handbuch der Phys., Vol. 53, 253, 1959.


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