English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We discuss the properties of the host galaxy and ring light distributions inthe optical and near infrared bands for a sample of Polar Ring Galaxies (PRGs),presented in Paper I (Iodice et al. 2002, Paper I). The goal of this work is totest different formation scenarios for PRGs, proposed by different authors inthe last decades, by comparing their predictions with these new data. Thestrategy is twofold: i) the integrated colors of the main components in thesesystems are compared with those of standard morphological galaxy types, toinvestigate whether differences in colors are caused by dust absorption ordifference in stellar populations. We then derived an estimate of the stellarpopulation ages in PRGs, which can be used to set constrains on the dynamicalmodeling and the time evolution of these systems; ii) we analyse the structuralparameters of the host galaxy in order to understand whether this component isa standard early-type system as its morphology suggests, and the lightdistribution in the polar ring to measure its radial extension. Theseobservational results indicate that the global properties of PRGs are betterexplained by dissipative merging of disks with un-equal masses as proposed byBekki (1998), rather than the accretion-or stripping-of gas by a pre-existingearly-type galaxy.Comment: 11 pages, 7 postscript figures, accepted for publication in A&

Near-Infrared photometry in $\vec{J}$ $\vec{H}$ and $\vec{Kn}$ bands for polar ring galaxies