A new catalogue of polar-ring galaxies selected from the SDSS
Alexei Moiseev (1), Ksenia Smirnova (2), Aleksandrina Smirnova (1),, Vladimir Reshetnikov (3,4) ((1) Special Astrophysical Observatory, (2) Ural, State University (3) St. Petersburg State University, (4) Observatoire de, Paris)

TL;DR
This paper introduces a new catalogue of polar-ring galaxy candidates from SDSS data, significantly expanding the known sample and providing a basis for future detailed and statistical studies of these unique galaxies.
Contribution
The authors present a new, large catalogue of polar-ring galaxy candidates derived from Galaxy Zoo classifications and SDSS imaging, including spectroscopic confirmation of several objects.
Findings
Confirmed polar rings in five galaxies through spectroscopy
Catalogue includes 70 high-confidence PRG candidates
Identified face-on polar ring candidates
Abstract
(Abridged) Galaxies with polar rings (PRGs) are a unique class of extragalactic objects allowing to investigate a wide range of problems, linked with the formation and evolution of galaxies, and to study the properties of their dark haloes. The progress in the study of PRGs is constrained by a small number of known objects of this type. Up to date, we can only attribute about two dozens of kinematically-confirmed galaxies to this class, mostly from Whitmore et al. (1990) catalogue. We present a new catalogue of PRGs based on the results of the original Galaxy Zoo project. Based on the preliminary classification of the Galaxy Zoo, we viewed more than 40000 images of the Sloan Digital Sky Survey (SDSS) and selected 275 galaxies, included in our catalogue. Our Sloan-based Polar Ring Catalog (SPRC) contains 70 galaxies that we classified as "the best candidates", among which we expect to…
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