Properties and Structural Features of Early-type Disk Galaxies with Multi-tier Disks

TL;DR

This study analyzes SDSS r-band images of 85 early-type unbarred galaxies, revealing that all possess double-tiered exponential disks, and provides statistical insights into their structural parameters.

Contribution

It presents the first comprehensive photometric decomposition of early-type unbarred galaxies showing universal presence of double-tiered disks and offers detailed statistical analysis.

Findings

All studied galaxies have double-tiered exponential disks.

Statistical distributions of disk parameters are derived.

Photometric decomposition method applied to SDSS images.

Abstract

The results of photometric decomposition of surface brightness distributions in 85 early-type unbarred galaxies are presented. The SDSS r-images are analysed. Double-tiered exponential disks are found in all galaxies which are studied; the statistics of the disk parameters is derived.