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Date and Time of the Query: 2019-06-26 T17:20:01 PDT
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Notes for object NGC 4104 GROUP

4 note(s) found in NED.


1. 2002AJ....123..100K
Re:MKW 04s
2.3.3. MKW 4s
All redshifts for MKW 4s are from the literature. Most are from the
Updated Zwicky Catalog (UZC; Falco et al. 1999); two are from Kirshner,
Oemler, & Schechter (1978), and two from Thorstensen et al. (1995). The
UZC notes whether galaxy spectra have emission lines (E), absorption lines
(A), or both (B); we classify the E and B galaxies as Em. The two galaxies
from Thorstensen et al. (1995) are listed as absorption-line galaxies.
Many of the velocities in the UZC were measured with FAST; for those we
measured H{alpha} equivalent widths as described above. We quote no
equivalent width for the six cluster galaxies not measured with FAST; the
raw spectra were unavailable. One of the six is listed in the UZC as
type E; we classify it Em. Another is listed as type A; we classify it Ab.
The two Thorstensen et al. galaxies remain Ab, and we classify the two
galaxies from Kirshner, Oemler, & Schechter (1978) as Ab based on their
morphology (S0).

2. 2002AJ....123..100K
Re:MKW 04s
3.1.11. MKW 4s
Figure 6 (top) shows the positions and velocity histograms for MKW 4s.
The Pisani algorithm identifies the six galaxies near 6500 km s^-1^ as a
separate group; the cluster itself ranges from 7491 to 10,145 km s^-1^.
The six galaxies are not clumped, and they are all at least 1.75^deg^ from
the cluster center. The high-velocity tail is problematic; it is tempting
to exclude the last three galaxies from the sample, but even removing the
lower bound on s_0_ preserves them in the sample. These three galaxies are
all at the southern edge of the cluster, in close proximity to each other.
We note that two of them are Em and will be excluded from the dynamical
analysis. The five galaxies in the clump near 9000 km s^-1^ are all near
the cluster center.

3. 1999MNRAS.306..857C
Re:RX J1206.6+2810
The observed galaxy (NGC 4104) is a double galaxy in the group MKW4s,
the two components separated by 2.8 arcsec (2.2kpc). The emission line
system spans the two systems. The cluster is an EMSS source (Stocke et
al. 1991).

4. 1999MNRAS.306..857C
Re:RX J1206.6+2810
RXJ1206.5+2810 The observed galaxy (NGC 4104) is a double galaxy in the
group MKW4s, the two components being separated by 2.8 arcsec (2.2 kpc).
The emission-line system spans the two systems. The cluster is an EMSS
source (Stocke et al. 1991).


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