NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-20 T07:24:08 PDT
Help | Comment | NED Home

Notes for object NGC 3982

20 note(s) found in NED.


1. 2007AJ....134..648M
Re:NGC 3982
NGC 3982 (Figs. 7.50, 9.50, 20.50): Although this galaxy was classified as
ringed in the RC3 catalog, in our Hubble images this feature is clearly
identified as a spiral of star-forming regions, star clusters, and dust lanes.

2. 2005MNRAS.364..283E
Re:NGC 3982
NGC 3982. Type II outer-disc profile. Bar measurements are from a NICMOS2 F160W
image; outer-disc PA is from Sanchez-Portal et al. (2000).

3. 2004MNRAS.350.1087S
Re:NGC 3982
NGC 3982: this is the latest type (SABb) galaxy that presents a type II
disc. We have applied a fit with r_cut_= 12 arcsec.

4. 2003ApJS..146..353M
Re:NGC 3982
NGC 3982 (GD)
There is a grand-design nuclear spiral in the central kiloparsec,
although some of the other spiral dust lanes in the circumnuclear
region have nearly comparable contrast.

5. 2002MNRAS.337..808K
Re:NGC 3982
A7 NGC 3982
NGC 3982 is one of two barred spirals with a Seyfert 2 nucleus in our
sample. The presence of a small bar, at a radius of around 10 arcsec, is
evident from the I-band image (Fig. 1g) and from the ellipticity and PA
profiles. Further out, the disc is dominated by a spiral pattern. The B-I
colour index image displays a rich multi-armed spiral pattern in dust and
SF, but is rather smooth near the nucleus. This multi-armed spiral pattern
is clear also in the H{alpha} image, with several luminous clumps of SF
located mainly in the arm south of the nucleus, and slightly less in the
arm north of it. The nucleus of this galaxy, while neutral in B-I , is a
relatively strong H{alpha} emitter. We cannot say how much of this emission
is due to stars or the AGN, but the latter is a likely contributor. The
H{alpha} profile displays a peak in the nucleus, followed by a dip and a
secondary peak corresponding in radius to the zone where the SF sites in
the spiral arms are located. The profile drops rapidly after a radius of
20-25 arcsec. The B-I profile reflects the H{alpha} peak due to the spiral
arm SF as a blue depression. The calibration of our B and I-band data is
subject to larger uncertainties than in other galaxies, because no aperture
photometry was available for this galaxy. We use average values for the B
and I surface brightness and B-I colour, as derived from those other sample
galaxies for which calibration was available, and concentrate on the
changes in colours rather than on the exact calibrated value.
The CNR of NGC 3982 (Fig. 2g), which may in fact be interpreted as the
emission from the relatively compact disc of this galaxy (the scalelength
of the exponential disc is only 0.6 kpc - Table 1), shows many individual
sites of H{alpha} and NIR emission. The relationship between these two
kinds of emission is not clear, however, due to the relatively small signal
to noise ratio in the areas of interest. Comparison with the HST image as
shown in Paper I, however, indicates that the same individual regions are
responsible for H{alpha} and NIR emission.

6. 2002AJ....124..675C
Re:UGC 06918
CfA Seyfert 2 (Huchra & Burg 1992).

7. 2002A&A...389...68G
Re:NGC 3982
NGC 3982: this is a small apparent size galaxy nearly face-on and
the HII region catalog is quite poor. Both our methods have two
clear minima, however, and are in good agreement between them.
Moreover, they are in rough agreement with the photometry, so we
adopt the mean values of all methods.

8. 2001ApJS..133...77H
Re:NGC 3982
NGC 3982 (S1.9).Ulvestad & Wilson (1989) detected the source at 6 cm
but not at 20 cm because of strong confusion; there is a 421 mJy background
source in the field (cf. Table 4). Kukula et al. (1995) give a measurement
at 3.6 cm. We detected an unresolved core at 6 and 20 cm. In addition, our
tapered 6 cm map shows a weak, elongated feature roughly 4 kpc in length
along P.A. = 0^deg^-10^deg^. The feature is more evident toward the south
of the nucleus, but it can be seen also extending to the north of it.

9. 2001ApJ...562..139M
Re:NGC 3982
NGC 3982. - McLeod & Rieke (1995) did not find evidence of the host
galaxy bar in their K image of this "SAB" galaxy. While our ellipse fits
and GALFIT model do recover a larger ellipticity than that suggested by
the axis ratio of b/a ~ 0.9 that they measured, our images are not
sufficiently sensitive on the large scales necessary to detect a host
galaxy bar.

10. 2000MNRAS.317..234P
Re:NGC 3982
3.7 NGC 3982
We see a multi-armed spiral pattern in our images (Fig. 2g), in
agreement with Regan & Mulchaey (1999) who describe the global
morphology of this galaxy as multi-armed. There is a lot of structure in
our ground-based images, but a detailed comparison with the colour index
maps obtained by Regan & Mulchaey (1999) is difficult owing to the lower
spatial resolution of our images. The HST NIR image (Fig. 1) is the one
used by Regan & Mulchaey, and shows the rather faint spiral structure in
the CNR. Our colour index map shows that this galaxy has a small red
nucleus, classified as Sy2. The ellipticity of the isophotes reaches a
maximum at a radius of 9 arcsec. This could correspond to a ring, a
small bar or a triaxial bulge.
The radial colour profiles (J-K and H-K) follow a characteristic
shape, becoming very red close to the nucleus, with the colour most
likely being due to emission from dust heated by the AGN radiation
field. The colours become bluer until a certain radius (the location of
the ring), after which they remain constant. Such a profile shape is
seen only in the AGN of our sample. The difference in colour between the
nucleus and the ring radius is about 0.2 mag in both J-K and H-K.

11. 1999AJ....117.2676R
Re:NGC 3982
The global extinction morphology of NGC 3982 is clearly a spiral
pattern with more extinction to the north of the nucleus (Fig. 2p). The
spiral pattern appears to be multiarmed with there being between two and
four arms depending on how they are identified. One spiral arm can be
traced over 360^deg^ degrees of arc and approaches to within the
resolution of our images (0.15" or 10 pc). Blue features are visible to
the ~8" southeast and northwest of the nucleus on the outside of the
dust lanes. The dust lanes in the images also seem to be quite smooth as
they near the nucleus compared with their more clumpy nature toward the
outer edge of the images (750 pc from the center).

12. 1998ApJ...500..685P
Re:NGC 3982
4. NGC 3982.--NGC 3982 has been spectroscopically classified as a type 2 Seyfert
nucleus, the host galaxy being an SABb galaxy, whose disk shows many
star-forming regions mostly located in the spiral arms. The fit to the mid- and
far-IR SED requires three thermal components with temperatures of 15, 39, and
125 K. The width of these components is 14, 25, and 53 K, respectively. As in
NGC 3227, the cold 39 K component is the dominant one, something very likely
related to the high density of star-forming regions present in the disk of this
galaxy.

13. 1997ApJS..112..391H
Re:NGC 3982
NGC 3982.--This Seyfert 2 nucleus (Paper III) contains an extremely faint
(f_blend_~12%), broad H{alpha} component (Fig. 10h). Although the broad
H{alpha} is apparent only after detailed profile fitting, we are reasonably
confident of this detection. [N II] has the same profile as [S II], but narrow
H{alpha} differs slightly.

14. 1997ApJS..110..299M
Re:NGC 3982
Bar is visible in both the ellipse fits and the K_S_image. Unbarred in the
RSA.

15. 1997ApJS..108..155G
Re:NGC 3982
NGC 3982 is an S2 nucleus in an Sb host galaxy. The galaxy has a compact
nucleus in H{alpha} and in [O III]. Most of the disk is filled with H II
regions, within a radius of 20" (1.5 kpc). [O III] emission associated
with the H II regions is also detected (see Figure 11f).

16. 1995MNRAS.276.1262K
Re:NGC 3982
NGC 3982: Type 2. Host galaxy: SB (CPG), spiral (UGC). Radio: the C-array
component may be slightly extended towards the south-west. However,
almost all of the C-array flux is accounted for by the compact A-array
object, so the amount of extended emission cannot be large. The radio
positions differ from that of the optical nucleus by ~5 arcsec (400pc).

17. 1995ApJS...98..477H
Re:NGC 3982
NGC 3982 can be classified as a Seyfert 2 galaxy based on its emission-
line spectrum. In addition to the typical bright lines, the high S/N
spectrum in Figure 46 shows [O III] {lambda} 4363, He II {lambda}4686,
and [S III] {lambda} 6312. The profiles of the bright lines have a
noticeable blue asymmetry, a property common to many Seyfert galaxies
(e.g., Whittle 1985).

18. 1993ApJS...86....5K
Re:NGC 3982
NGC 3982; Sbc, Seyfert 2.
This Sbc galaxy does not have any prominent emission lines in the UV,
despite being classified as Seyfert 2-like by Phillips et al. (1983)
based on the presence of high-excitation lines and low intrinsic
luminosity in the optical. The UV continuum is dominated by the normal
Sbc galaxy spectrum and shows evidence of absorption features.

19. 1976RC2...C...0000d
Re:NGC 3982
Spectrophotometry:
Observatory, 88, 239, 1968.

20. 1964RC1...C...0000d
Re:NGC 3982
Small, very bright nucleus. (r): 0.33 arcmin x 0.29 arcmin. Several knotty
arms with faint outer extensions.
Lund 9, Heidelberg Veroff. Vol. 9, 1926 dimensions are for the bright part only.
See also HA, 105, 230, 1937.
Magnitude:
Ap. J., 85, 325, 1937.


Back to NED Home