Dwarf Galaxies in the NGC 1023 Group
Neil Trentham, Brent Tully
TL;DR
This paper catalogs and analyzes the dwarf galaxy populations in the NGC 1023 Group, revealing two distinct types associated with different regions, similar to those in the Local Group.
Contribution
It provides a detailed compilation and analysis of dwarf galaxy populations in the NGC 1023 Group, highlighting the presence of two distinct populations and their characteristics.
Findings
Two dwarf galaxy populations identified: elliptical in the halo and irregular in the infall region.
Faint-end slope of the luminosity function is between -1.27 and -1.12.
Similar populations observed in the Local Group.
Abstract
We present a compilation of galaxies in the NGC 1023 Group, an accumulation of late-type galaxies at a distance of 10 Mpc. Members at high and intermediate luminosities were identified from their spectroscopic velocities. Members at low luminosities were identified from their morphologies on wide-field CCD images. The faint-end slope is in the range -1.27 < alpha < -1.12. There is evidence for two dwarf galaxy populations: one in the halo of NGC 1023 that is dominated by dwarf elliptical galaxies, and one in the infall region surrounding NGC 1023 that contains mainly dwarf irregular galaxies. Similar distinctive populations are observed in the Local Group.
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