Scientific Seminars

Physical properties of galaxy bulges and disks from simultaneous structural modelling and SED fitting

Sabine Bellstedt
ICRAR-University of Western Australia

2024-03-05    11:00    Brera - OAB Colloquia: Cupola Fiore + Sala virtuale - https://meet.google.com/ehi-hpit-bzr

In the pursuit of understanding the evolution of galaxies, extragalactic astronomers go to great lengths to collect data and conduct modelling to measure the structural properties of galaxies through imaging analysis, and the physical properties of galaxies (such as star formation rate and stellar mass) through spectral analysis. These branches of analysis are typically separated by data types and analysis techniques, making it challenging to combine the two to conduct an analysis of the physical properties of galaxy components. In this seminar, I will outline the newest incarnation of Spectral Energy Distribution (SED) fitting, in which multi-wavelength fitting is combined with simultaneous structural decomposition using the software ProFuse. This facilitates a measurement of SED-derived properties for the individual components of galaxies (including bulges and disks), opening up a broad wealth of opportunities for studying galaxy evolution. I will present the first scientific analysis to result from this technique to extract the cosmic star formation history of bulges, disks, and spheroids.