Date and Time of the Query: 2019-08-25 T14:22:17 PDT
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Notes for object NGC 3557

13 note(s) found in NED.

1. 2005A&A...440...73C
Re:NGC 3557
NGC 3557: the behaviour galaxy is very similar to NGC 3258, see above. Here the
break radius is at r_b_ = 1.60", while the dusty disk has a radius of r = 0.95".
The brightness deficit at the center in this case for {gamma} = 0.3 would be of
a factor 2.2, again suggesting a classification as a likely core galaxy.

2. 2001AJ....121..808C
Re:NGC 3557
NGC 3557. - The color map reveals a possible ring of dust near the
center of the galaxy. NGC 3557 is a double-tailed radio source with a
central knot and a jet (Birkinshaw & Davies 1985). IRAS detected this
galaxy at 12, 60, and 100 microns (Knapp et al. 1989).

3. 2001A&A...380..471B
Re:NGC 3557
1107-372 - NGC 3557, we measure a velocity dispersion of 295 +/- 7 km s^-1^
and a velocity gradient of ~150 km s^-1^ in the central 5" in good
agreement with data available in Hypercat.

4. 2000A&AS..143..369G
Re:NGC 3557
1107-372: NGC 3557 is an FRI radio source (Birkinshaw & Davies 1985) in
which H{alpha}+[NII] extended emission has been detected (Goudfrooij et
al. 1994). The luminosity and geometrical profiles indicate a regular
elliptical morphology.

5. 1994MNRAS.269..713R
Re:NGC 3557
NGC 3557. Despite the presence of a strong, double-tailed radio source,
with a prominent central knot and a jet at a position angle of 78^deg^+/-
6^deg^ (Birkinshaw & Davies 1985), this galaxy has the simplest optical
structure (pure elliptical) of the 11 galaxies in the sample. Veron-Cetty
& Veron (1986) detected nuclear NII emission from this galaxy, but
Roberts et al. (1991) failed to find any HI 21-cm emission. Despite the
presence of a significant gradient in the Mg_2_ index (Carollo et al.
1993), we find no evidence for any significant colour variations.

6. 1994CAG1..B...0000S
Re:NGC 3557
NGC 3557 Group
March 25/26, 1980
103aD + GG495
45 min
NGC 3557 is the eponymous galaxy of a group of moderately bright
galaxies whose mean redshift is = 2527 km/s (Sandage 1975b).
Other members of the group include NGC 3564 and NGC 3568.
The morphology of NGC 3557 is prototypical E3.

7. 1994A&AS..105..341G
Re:NGC 3557
The H{alpha}+[NII] image reveals line emission extended in the
North-South direction. The outer isophotes of the line emission twist
gradually towards the apparent major axis of the galaxy. The B-V image
only shows a symmetric colour gradient with no evidence for obvious dust
absorption associated with the ionized gas. The [NII]{lambda}6583 to
H{alpha} ratio at the centre is 1.37. Detected by IRAS at 60 and 100
microns. Bright radio elliptical.

8. 1994A&AS..104..179G
Re:NGC 3557
Normal elliptical from the surface photometry: no significant isophotal
deviations from ellipses. Detected by IRAS at 60 and 100 microns. Bright
radio elliptical.

9. 1985SGC...C...0000C
Re:NGC 3557
Plate 1312
Brightest in group. SB(s)0o 6.7 south-preceding.

10. 1982ESOU..C...0000L
Re:ESO 110735-3716.0
=ESO 377- G 16
in cluster

11. 1976RC2...C...0000d
Re:NGC 3557
In Klemola Group No. 18 (A.J., 74, 804, 1969).
Non-interacting pair with NGC 3564 at 7.5 arcmin.
NGC 3568 at 11.5 arcmin
Radio Observations:
Proc. A.S. Australia, 2, 159, 1972.

12. 1976RC2...C...0000d
Re:NGC 3557
Non-interacting pair with NGC 3564 at 7.5 arcmin

13. 1964RC1...C...0000d
Re:NGC 3557
Bright nucleus. Perhaps this is an S0?
Non-interacting pair with NGC 3564 at 7.5 arcmin.
NGC 3568 at 11.5 arcmin.

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