Probing galactic growth through the study of Low Surface Brightness tidal features

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• Elisabeth Sola
• Wednesday 29 November 2023, 13:40-14:05
• The Hoyle Lecture Theatre + Zoom .

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In hierarchical models, the assembly history of galaxies can be probed through the study of their Low Surface Brightness (LSB) stellar structures, which are remnants of past interactions and accretion events. These LSB tidal features are sensitive to the type of merger that occurred, but also to the environment and properties of their host galaxies. Using a dedicated annotation tool, we investigated of the properties of LSB tidal features around a sample of 475 nearby massive galaxies located in the Virgo cluster and in the field. We used deep images obtained with the Canada-France-Hawaii Telescope: MATLAS , CFIS/UNIONS, VESTIGE and NGVS . From our database of LSB structures we computed quantitative properties such as geometry and luminosity using automated aperture photometry. I will present results on the evolution of the fraction of galaxies with tidal debris and the fraction of luminosity in haloes as a function of the mass of the host galaxy and of its environment.

This talk is part of the Institute of Astronomy Seminars series.

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• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Seminars
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
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• The Hoyle Lecture Theatre + Zoom

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