VEGAS: A VST Early-type GAlaxy Survey.VI. The diffuse light in HCG 86 from the ultra-deep VEGAS images
Rossella Ragusa (1, 2), Marilena Spavone (1), Enrichetta Iodice, (1), Sarah Brough (3), Maria Angela Raj (1), Maurizio Paolillo (2), Michele, Cantiello (4), Duncan A. Forbes (5), Antonio La Marca (2), Giuseppe D Ago, (6), Roberto Rampazzo (7)

TL;DR
This study presents ultra-deep imaging of HCG 86, revealing the diffuse intragroup light and analyzing its properties to understand galaxy group formation processes, with results consistent with satellite disruption at z ~ 0.4.
Contribution
First ultra-deep imaging of HCG 86 to map and analyze the intragroup light, providing insights into its origin and evolution compared to theoretical models.
Findings
IGL constitutes about 16% of total group luminosity.
IGL has average colors g - r ~ 0.8 mag and r - i ~ 0.4 mag.
The IGL distribution extends to ~160 kpc at a surface brightness of 30 mag/arcsec^2.
Abstract
Context. In this paper we present ultra deep images of the compact group of galaxies HCG 86 as part of the VEGAS survey. Aims. Our main goals are to estimate the amount of intragroup light (IGL), to study the light and color distributions in order to address the main formation process of the IGL component in groups of galaxies. Methods. We derived the azimuthally averaged surface brightness profiles in the g,r and i bands with g - r and r - i average colors and color profiles for all group members. By fitting the light distribution, we have extrapolated the contribution of the stellar halos plus the diffuse light from the brightest component of each galaxy. The results are compared with theoretical predictions. Results. The long integration time and wide area covered make our data deeper than previous literature studies of the IGL in compact groups of galaxies and allow us to produce an…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Stellar, planetary, and galactic studies
