UGC 10043 in Depth: Dissecting the Polar Bulge and Subtle LSB Features
arXiv:2505.13653 · doi:10.1051/0004-6361/202554995
Abstract
Galaxies with polar structures -- of which polar-ring galaxies (PRGs) are a prominent subclass -- contain components that are kinematically decoupled and highly inclined relative to the host galaxy's major axis. Modern deep optical surveys provide a powerful means of detecting low surface brightness (LSB) features around galaxies, offering critical insights into the formation and evolution of galaxies with polar structures. UGC 10043 is an edge-on galaxy notable for its prominent bulge, which extends orthogonally to the disk plane. In addition, the galaxy displays a well-defined integral-shaped disk warp and multiple dust features crossing the bulge along the minor galaxy axis. In this work, we present new deep optical photometry of UGC 10043 down to 29.5 mag arcsec and perform a detailed analysis of its LSB and polar structures. The observations reveal a stellar stream aligned along the polar axis, alongside other signatures of tidal interaction, including a flat, tilted LSB envelope that extends toward the neighboring galaxy MCG +04-37-035, with which UGC 10043 is connected by an HI bridge. Our results suggest that the polar component of UGC 10043 comprises and older, triaxial polar bulge and a younger, forming polar structure, likely originating from the ongoing disruption of a dwarf satellite galaxy, while also participating in active interaction with MCG +04-37-035.
5 pages, 3 figures, accepted for publication in A&A Letters
References in corpus (12)
- The Atlas3D project -- XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images
- The Structure of Classical Bulges And Pseudobulges: The Link Between Pseudobulges And Sersic Index
- Galactic Warps Induced By Cosmic Infall
- The Formation of Polar Disk Galaxies
- Hidden depths in the local Universe: The Stellar Stream Legacy Survey
- Formation of Warped Disks by Galactic Fly-by Encounters. I. Stellar Disks
- A Comprehensive Examination of the Optical Morphologies of 719 Isolated Galaxies in the AMIGA Sample
- Polar-ring galaxies: the SDSS view on the symbiotic galaxies
- WALLABY Pilot Survey: the Potential Polar Ring Galaxies NGC~4632 and NGC~6156
- A feather on the hat: Tracing the giant stellar stream around the Sombrero galaxy
- Metallicity and ionization state of the gas in polar-ring galaxies
- Tilted outer and inner structures in edge-on galaxies?