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Date and Time of the Query: 2019-05-19 T22:01:22 PDT
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Notes for object NGC 7592B

1 note(s) found in NED.


1. 1995ApJS...99..461N
Re:MRK 0928
Velocity information from the spectra in Figure 23 shows that within the
uncertainties, sources a and b lie at nearly the same redshift, while
source c lies approximately 300 km s^-1^ closer to the sun. From the B, V
and R image of MBo93, Mrk 928 has a triangular arrangement of sources
with several sweeping tails. A northern tail extends from source a to the
east, while a second sweeps from source c to the west. A third tail
extends from the eastern part of the galaxy near the vicinity of source b
and then curves downward to the southeast of the galaxy. Both a and c lie
5.8 kpc from the large region of source b while a has a velocity
difference with b of 90 (+/-106) km s^-1^, and c has a velocity with
respect to b of 190 (+/-92) km s^-1^. The spectra show that the level of
the continuum in source c is half that of source a which is half that of
source b. The flux in the H{alpha} line is the least for c while being
the greatest for b. Greater line widths in source a leads to a larger
degree of blending of emission lines and suggesting a Seyfert type
object.
Rafanelli & Marziani (1992) and Dahari & de Robertis (1988) classify a
as a Seyfert 2 object with Rafanelli & Marziani also claiming substantial
starburst activity contributing to the H{alpha} flux (~75%). Lonsdale et
al. (1992), in addition, finds the eastern source (the labels of a and b
being reversed) to display an entirely H II region type spectrum. The
conclusion of Rafanelli & Marziani is that Mrk 928 is a merger of two
(and possibly three galaxies if one includes source c) where the western
component of Mrk 928 with source a as its nucleus, is experiencing a
prograde encounter with the eastern component containing source b.


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