Polar-ring galaxies: the SDSS view on the symbiotic galaxies

Abstract

Polar-ring galaxies are multi-spin systems, showing star formation in a blue late-type component, perpendicular to a red early-type one, revealing how galaxy formation can sometimes occur in successive steps. We perform two-dimensional decomposition in the $g$, $r$, $i$ bandpasses of 50 polar-ring galaxies (PRGs) from the Sloan Digital Sky Survey. Each object was fit with a Sérsic host galaxy and a Sérsic ring. Our general results are: (i) The central (host) galaxies of the PRGs are non-dwarf sub-$L^{\ast }$ galaxies with colors typical for early-type galaxies. (ii) Polar structures in our sample are, on average, fainter and bluer than their host galaxies. (iii) In most galaxies, the stellar mass M${}_{\ast }$ of the polar component is not negligible in comparison with that of the host. (iv) The distributions of the host galaxies on the size -- luminosity and Kormendy diagrams are shifted by $\sim 1^m$ to fainter magnitudes in comparison with E/S0 galaxies. It means that the PRGs hosts are more similar to quenched disks than to ordinary early-type galaxies. (v) All the PRGs in our sample are detected in mid-infrared by WISE, and we derive from the 22$\mu$m luminosity their star formation rate (SFR). Their SFR/M${}_{\ast }$ ratio is larger than for the early-type galaxy sample of Atlas${}^{3D}$, showing that the star forming disk brings a significant contribution to the new stars. Globally, PRGs appear frequently on the green valley in the mass-color diagram, revealing the symbiotic character between a red-sequence host and a blue cloud ring.

arXiv comment8 pages, 11 figures, accepted for publication in MNRAS

References in corpus (26)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• The size distribution of galaxies in the Sloan Digital Sky Survey
• The Calibration of Mid-Infrared Star Formation Rate Indicators
• The Green Valley is a Red Herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early- and late-type galaxies
• A Catalog of Bulge+Disk Decompositions and Updated Photometry for 1.12 Million Galaxies in the Sloan Digital Sky Survey
• Analytical approximations of K-corrections in optical and near-infrared bands
• SDSSJ150634.27+013331.6: the second compact elliptical galaxy in the NGC5846 group
• The ATLAS3D Project - XXVIII. Dynamically-driven star formation suppression in early-type galaxies
• Formation of polar ring galaxies
• The Morphologies of Massive Galaxies at 1<z<3 in the CANDELS-UDS Field: Compact Bulges, and the Rise and Fall of Massive Disks
• E/S0 Galaxies on the Blue Color-Stellar Mass Sequence at z=0: Fading Mergers or Future Spirals?
• A Catalogue of Morphologically Classified Galaxies from the Sloan Digital Sky Survey: North Equatorial Region
• Formation of a polar-ring galaxy in a galaxy merger
• The origin of polar ring galaxies: evidence for galaxy formation by cold accretion
• A new catalogue of polar-ring galaxies selected from the SDSS
• The Formation of Polar Disk Galaxies
• The Kormendy Relation for early-type galaxies. Dependence on the magnitude range
• Near-Infrared photometry in the J, H and Kn bands for Polar Ring Galaxies: I. Data, structural parameters
• Polar Ring Galaxies in the Galaxy Zoo
• Near-Infrared photometry in the J, H and Kn bands for Polar Ring Galaxies: II. Global Properties
• On the Nature of the Apparent Ring Galaxy SDSS J075234.33+292049.8
• Data and 2D scaling relations for galaxies in Abell 1689: a hint of size evolution at z~0.2
• Are polar rings indeed polar?

Cited by in corpus (14)

• Dust emission profiles of DustPedia galaxies
• New candidates to polar-ring galaxies from the Sloan Digital Sky Survey
• Metallicity and ionization state of the gas in polar-ring galaxies
• Automatic detection of full ring galaxy candidates in SDSS
• Active galactic nuclei among polar-ring galaxies
• Tidal features and disc thicknesses of edge-on galaxies in the SDSS Stripe 82
• Polar-bulge galaxies
• Discovery of the Polar Ring Galaxies with deep learning
• Spatial environment of polar-ring galaxies from the SDSS
• DES J024008.08-551047.5:A new member of the polar ring galaxy family
• Connecting the dots: Tracing the evolutionary pathway of Polar Ring Galaxies in the cases of NGC 3718, NGC 2685, and NGC 4262
• COUGS-DESI: A Catalog of Unusual Galaxies with Polar Structures in the DESI Legacy Imaging Surveys
• UGC 10043 in Depth: Dissecting the Polar Bulge and Subtle LSB Features
• A catalog of automatically detected ring galaxy candidates in PanSTARRS