I present a new catalog of LSB galaxies in the Centaurus cluster, which is built from wide-field multi-band images from the VST Early Type Galaxy Survey (VEGAS). The VST mosaic covers a field of view of 2x3 deg^2 centered on NGC 4696. I developed a new detection tool to identify and analyse LSB galaxies in the g’ and r’ bands. Such a tool is based on segmentation maps for galaxy detection, machine learning for false positive selection, and Bayesian modelling for measuring galaxy structural properties. I detected 13 new UDGs and more than 200 LSB galaxies (more than 60 newly discovered). I also found three LSB galaxies with a bright nucleus, that were classified as UV sources by the GALEX telescope. This work is part of my PhD project, which aims at applying this detection tool to the entire VEGAS sample, which covers more than 100 deg^2. In this talk, I illustrate this new tool and preliminary results, and how it could be implemented for the future deep imaging surveys. Then, I discuss the spatial distribution of LSB galaxies in comparison to bright galaxies. Finally, I present the scaling relations and cluster-centric distance trends of the galaxy properties.
14/03/2024
The speaker is: Nicola Bellucco (UniPD)
Thursday March 14th at 11:30.
The seminar can be attended in person in Sala Jappelli or remotely through the zoom link:
Join Zoom Meeting
https://unipd.zoom.us/j/85273198731?pwd=V1ZiNE9ZWUN4ZTdIUzJsTFo0Z3U2Zz09
Meeting ID: 852 7319 8731
Passcode: 208186