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Date and Time of the Query: 2019-03-23 T19:36:08 PDT
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Notes for object NGC 6050B

2 note(s) found in NED.


1. 1994A&AS..103....5A
Re:IC 1179
IC 1179/NGC 6050: These two galaxies were observed serendipitously
together with NGC 6054. This pair is also known as Arp 272; NGC 6050 is
to the northeast of IC 1179.
Our continuum isophotes are strongly biased because the galaxies were
on the very edge of the interference filter. To make things worse, a
spurious reflection from a bright nearby field galaxy (IC 1182)
contaminates the outermost isophotes to the North of NGC 6050. We
therefore chose to draw the continuum isophotes with a rather high
threshold to show both galaxies clearly separated and two bright spots
visible for IC 1179. Although IC 1179 appears clearly more extended than
its companion in H{alpha} emission, this is due to its redshift matching
better our interference filter. IC 1179 has its H{alpha} redshifted to
6804 A whereas NGC 6050 is redshifted only to 6770 A, thus falling well
outside the main portion of the passband of the interference filter.
Note the strong continuum spot to the northwest of N 6050, which may
be a small elliptical companion since it has no H{alpha} emission at all.
The two velocity fields could be drawn rather easily, even for
NGC 6050 despite the faint transmission at its velocity. NGC 6050
exhibits a regular spiral structure and velocity field, but IC 1179
exhibits a distorted structure and velocity field. Nevertheless both
rotation curves appear quite acceptable. We hardly reach 0.8 R_25_ for
NGC 6050 but reach almost to 2 R_25_ in the case of IC 1179, especially
because of the approaching side extending twice as far as the receding
side.
For these galaxies and NGC 6054 (which is in the same field) we had a
special problem determining the systemic velocity. For such high
redshifts the H{alpha} wavelength is far from the adopted calibration
wavelength (a Neon line at 6598.95 A) and the phase correction applied to
the velocities becomes less precise, especially since it is computed for
a theoretical coating of the interferometer plates. Comparing with
published radio redshifts (RC3 for NGC 6054, Freudling et al. 1992 for
NGC 6050 and IC 1179) it appears that our velocities are systematically
low by 150 km s^-1^ (-155 km s^-1^ for IC 1179, -159 km s^-1^ for NCC
6050 and -107 km s^-1^ for NGC 6054). We have however, not applied any
correction.

2. 1964RC1...C...0000d
Re:IC 1179
[= NGC 6050A in RC1, IC 1179 in RC2 and RC3.]
V = 11,173 km/sec
(Ap. J., 130, 629, 1959).


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