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• W2109717017 abstract "Received / accepted Abstract. We present a complete refinement of the optical morphologies for galaxies in the Catalog of Isolated Galaxies (Karachentseva 1973) that forms the basis of the AMIGA (Analysis of the interstellar Medium of Isolated GAlaxies) project. Uniform reclassification using the digitized POSS II benefit ed from the high resolution and dynamic range of that sky survey. Comparison with independent classifications made for an SDS S overlap sample of more than 200 galaxies confirms the reli- ability of the early vs. late-type discrimination and the ac curacy of spiral subtypes withinT = 1-2. CCD images taken at the Observatorio de Sierra Nevada were also used to solve ambiguities in early versus late-type classifications. A consi derable number of galaxies in the catalog (n = 193) are flagged for the presence of nearby companions or sign s of distortion likely due to interaction. This most isolated sample of galaxies in the local Universe is dominated by two populations: 1) 82% spirals (Sa-Sd) with the bulk being luminous systems with small bulges (63% between types Sb-Sc) and 2) a significant population o f early-type E-S0 galaxies (14%). Most of the types later than Sd are low luminosity galaxies concentrated in the local superclus- ter where isolation is diffi cult to evaluate. The late-type spiral majority of the sampl e spans a luminosity range MB−corr =−18 to −22 mag. Few of the E/S0 population are more luminous than−21.0 marking an absence of, an often sought, super L ∗ merger (e.g. fossil elliptical) population. The rarity of high lum inosity systems results in a fainter derived M ∗ for this population com- pared to the spiral optical luminosity function (OLF). The E-S0 population is from 0.2 to 0.6 mag fainter depending how the sample is defined. This marks the AMIGA sample as almost unique among samples that compare early and late-type OLFs sep- arately. In other samples, which always involve galaxies in higher density environments, M ∗/S0 is almost always 0.3-0.5 mag brighter than M ∗, presumably reflecting a stronger correlation between M ∗ and environmental density for early-type galaxies." @default.
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• W2109717017 date "2006-04-01" @default.
• W2109717017 modified "2023-10-17" @default.
• W2109717017 title "The AMIGA sample of isolated galaxies II. Morphological refinement" @default.
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