VEGAS: a VST Early-type GAlaxy Survey. IV. NGC 1533, IC 2038 and IC 2039: an interacting triplet in the Dorado group

Abstract

This paper focuses on NGC 1533 and the pair IC 2038 and IC 2039 in Dorado a nearby, clumpy, still un-virialized group. We obtained their surface photometry from deep OmegaCAM@ESO-VST images in g and r bands. For NGC 1533, we map the surface brightness down to ${\mu }_g\simeq 30.11$ mag/arcsec${}^2$ and ${\mu }_r\simeq 28.87$ mag/arcsec${}^2$ and out to about $4R_e$. At such faint levels the structure of NGC 1533 appear amazingly disturbed with clear structural asymmetry between inner and outer isophotes in the North-East direction. We detect new spiral arm-like tails in the outskirts, which might likely be the signature of a past interaction/merging event. Similarly, IC 2038 and IC 2039 show tails and distortions indicative of their ongoing interaction. Taking advantages of deep images, we are able to detect the optical counterpart to the HI gas. The analysis of the new deep data suggests that NGC 1533 had a complex history made of several interactions with low-mass satellites that generated the star-forming spiral-like structure in the inner regions and are shaping the stellar envelope. In addition, the VST observations show that also the two less luminous galaxies, IC 2038 and IC 2039, are probably interacting each-other and, in the past, IC 2038 could have also interacted with NGC 1533, which stripped away gas and stars from its outskirts. The new picture emerging from this study is of an interacting triplet, where the brightest galaxy NGC 1533 has ongoing mass assembly in the outskirts.

Accepted for publication in The Astronomical Journal. High-resolution version of paper is available at the following link: https://www.dropbox.com/preview/VEGAS_IV.pdf?role=personal

References in corpus (24)

• Updated Nearby Galaxy Catalog
• The Atlas3D project -- XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images
• The structure of galactic disks: Studying late-type spiral galaxies using SDSS
• The Burrell Schmidt Deep Virgo Survey: Tidal Debris, Galaxy Halos, and Diffuse Intracluster Light in the Virgo Cluster
• On the origin of the faint-end of the red sequence in high density environments
• Intracluster light and the extended stellar envelopes of cD galaxies: An analytical description
• Galaxy Groups: A 2MASS Catalog
• The Dragonfly Nearby Galaxies Survey. I. Substantial variation in the diffuse stellar halos around spiral galaxies
• The Carnegie-Irvine Galaxy Survey. III. The Three-Component Structure of Nearby Elliptical Galaxies
• The star formation history of early-type galaxies as a function of mass and environment
• SPITZER IRS spectra of Virgo early type galaxies: detection of stellar silicate emission
• The Cluster Velocity Dispersion of the Abell 2199 cD Halo of NGC 6166
• New HI scaling relations to probe the HI content of galaxies via global HI-deficiency maps
• Southern GEMS Groups I: Dynamical Properties
• The Galaxy End Sequence
• The GALEX UV emission in shell galaxies: tracing galaxy "rejuvenation" episodes
• Intra-cluster patches of baryons in the core of the Fornax cluster
• The history of star formation and mass assembly in early-type galaxies
• Point spread function tails and the measurements of diffuse stellar halo light around edge-on disc galaxies
• Galaxy Zoo: major galaxy mergers are not a significant quenching pathway
• Kinematics, Substructure and Luminosity-weighted Dynamics of Six Nearby Galaxy Groups
• Isolated OB Associations in Stripped HI Gas Clouds
• The NIR structure of the barred galaxy NGC253 from VISTA
• The Red Halo Phenomenon

Cited by in corpus (15)

• The Fornax Deep Survey with VST. VIII. Connecting the accretion history with the cluster density
• Does the virial mass drive the intra-cluster light? The relationship between the ICL and M${}_{vir}$ from VEGAS
• The Fornax Deep Survey with VST. X. The assembly history of the bright galaxies and intra-group light in the Fornax A subgroup
• VEGAS: A VST Early-type GAlaxy Survey.VI. The diffuse light in HCG 86 from the ultra-deep VEGAS images
• VEGAS: VST Early-type GAlaxy Survey. V. IC 1459 group: Mass assembly history in low density environments
• Galaxy and Mass Assembly (GAMA): Extended Intra-Group Light in a group at $z=0.2$ from deep Hyper-Suprime Cam images
• The buildup of galaxies and their spheroids: the contributions of mergers, disc instabilities and star formation
• On the assembly history of massive galaxies. A pilot project with VEGAS deep imaging and M3G integral field spectroscopy
• Morphology and surface photometry of a sample of isolated early-type galaxies from deep imaging
• Distance to the Dorado galaxy group
• Dorado and its member galaxies. III. Mapping star formation with FUV imaging from UVIT
• Dorado and its member galaxies. Ha imaging of the group backbone
• A newly identified galaxy group thanks to tidal streams of intragroup light
• Dorado and its member galaxies II. A UVIT picture of the NGC 1533 substructure
• Searching for Intragroup Light in Deep U-band Imaging of the COSMOS Field