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The connection between the bulge mass or bulge luminosity in disk galaxiesand the number, spatial and phase space distribution of associated dwarfgalaxies is a discriminator between cosmological simulations related to galaxyformation in cold dark matter and generalized gravity models. Here, a nearbysample of isolated Milky Way class edge-on galaxies is introduced, tofacilitate observational campaigns to detect the associated families of dwarfgalaxies at low surface brightness. Three galaxy pairs with at least one of thetargets being edge-on are also introduced. About 60% of the catalogued isolatedgalaxies contain bulges of different size, while the remaining objects appearto be bulge-less. Deep images of NGC 3669 (small bulge, with NGC 3625 at theedge of the image) and NGC 7814 (prominent bulge), obtained with a 0.4-maperture, are also presented, resulting in the discovery of two new dwarfgalaxy candidates, NGC3669-DGSAT-3 and NGC7814-DGSAT-7. Eleven additional lowsurface brightness galaxies are identified, previously notified with lowquality measurement flags in the Sloan Digital Sky Survey (SDSS). Integratedmagnitudes, surface brightnesses, effective radii, Sersic indices, axis ratios,and projected distances to their putative major hosts are displayed. At leastone of the galaxies, NGC3625-DGSAT-4, belongs with a surface brightness ofapproximately 26 mag per arcsec^2 and effective radius >1.5 kpc to the class ofultra-diffuse galaxies (UDGs). NGC3669-DGSAT-3, the galaxy with lowest surfacebrightness in our sample, may also be an UDG.

astronomy and astrophysics

DGSAT: Dwarf Galaxy Survey with Amateur Telescopes II. A catalogue of  isolated nearby edge-on disk galaxies and the discovery of new low surface  brightness systems