Date and Time of the Query: 2019-03-18 T08:39:13 PDT
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Notes for object MESSIER 109

10 note(s) found in NED.

1. 2012ApJ...754...67F
Re:NGC 3992
NGC 3992 .SBT4..-This galaxy is prominently barred. While the bulge morphology
generally appears classical it exhibits a few randomly distributed dust lanes in
the only available optical HST image in F547M. With increasing radius the
velocity profile reaches a first plateau at r ~= 7" but outside the bulge radius
of 13.2" it starts rising again slowly. The velocity dispersion profile is
significantly depressed within the bulge region. The h_3_ moments are strongly
anti-correlated with velocity inward of 7" but become weaker further out. The
h_4_ moments show double peak feature around 8 arcsec.

2. 2005MNRAS.360.1201H
Re:NGC 3992
NGC 3992. This galaxy is the most massive spiral of the M81 group. Its H I
distribution is regular. It has a prominent bar and very well-defined spiral
arms. It has a faint radial H I extension outside its stellar disc. There is a
pronounced central H I hole in the gas distribution at exactly the radial extent
of the bar (Bottema & Verheijen 2002), also visible in the H{alpha} emission
line. Some H{alpha} can be seen toward the centre of the galaxy. It is not clear
whether this feature could exist in H I because of the poor spatial resolution
of the H I data measurements. Observations in CO (Helfer et al. 2003) stress the
lack of molecular gas in the galaxy.

3. 2002ApJS..142..223F
Re:NGC 3992
NGC 3992. NVSS did not detect this source. 54" resolution, 1.4 GHz
observations (Condon 1987) show a 21.3 mJy diffuse source.
High-resolution observations at various frequencies (Heckman 1980;
Hummel et al. 1985; Garcia-Barreto et al. 1993) show this object to
harbor a flat-spectrum, ~2 mJy core. However, for unclear reasons, the 4"
and 0.2" resolution 15 GHz observations of Nagar et al. (2000) give only
upper limit of 1.3 mJy to any radio emission.

4. 2002AJ....124..675C
Re:UGC 06937
Large galaxy; F11549+5339 is the correct identification despite the
large optical/FSC offset. Diffuse radio source, not in the NVSS

5. 2002A&A...391...83B
Re:NGC 3992
NGC 3992 (Fig. 11) features strong polarized radio emission from spiral
arms with aligned magnetic fields. Weak emission from the nucleus has
only been detected at {lambda}6 cm and 3 cm (the sensitivity was too
low at {lambda}22 cm and {lambda}18 cm). No emission from the bar has
been detected. Faraday rotation is significant (RM ~ +20 rad m^-2^ )
between {lambda}22 cm and {lambda}6 cm.

6. 1998ApJS..114...59L
Re:NGC 3992
NGC 3992 (M109).--Like NGC 2685, it was classified as a LINER solely on the
basis of the [O II]/[O III] ratio. No emission lines are detected in the
infrared spectrum. There is an obvious strong Pa{beta} absorption line. NGC
3992 also shows the strongest atomic absorption features of the classical
LINERs in this sample. The spectrum in Filippenko & Sargent (1985) also shows
prominent atomic absorption features and weak emission lines.

7. 1994CAG1..B...0000S
Re:NGC 3992
Feb 3/4, 1981
12 min
The spiral pattern in NGC 3992 is among
the most regular known in the sky. Before it
fragments, one of the two principal arms can be
traced for nearly a complete revolution from its
start near the end of the bar. The opposite arm
fragments into three segments after unwinding
for only about 90^deg^.
The arms do not begin at the tips of the bar
but rather at a position about 10^deg^ upstream from
these ends, i.e., in a direction opposite the direction
of rotation (inferred from the sense of the
spiral pattern). One of the several calculated
hydrodynamical models of Huntley (1980, Fig. 4)
reproduces the pattern.
The largest of the many HII regions in the
arms resolve into disks at the 1" level. The
redshift is v_o = 1134 km/s.

8. 1976RC2...C...0000d
Re:NGC 3992
A.J., 69, 759, 1964.
Bull. Inst. Ap. Duschambe, No. 41, 65, 1966.
Observatory, 88, 239, 1968.
A.J., 69, 759, 1964.

9. 1964RC1...C...0000d
Re:NGC 3992
Very bright, diffuse nucleus. Bright, smooth bar with dark lane: 1.7 arcmin x
0.5 arcmin. (r): 2.5 arcmin x 1.7 arcmin. 3 main partially resolved
filamentary arms with some branching.
See also HA, 105, 230, 1937.
Stockholm Ann., 17, No 3, 1951.
SN 1956,
Handbuch der Phys., Vol. 51, 774, 1958.
A.J., 65, 54, 1960.

10. 1918PLicO..13....9C
Re:NGC 3992
A beautiful, slightly oval spiral 7' in length. Bright, almost stellar nucleus;
whorls are rather open and show a number of faint condensations; the central
portions show traces of the "{phi}-type formation. 20 s.n.

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