Bulge-disc Decomposition of IFU data (BUDDI) (Evelyn Johnston, ESO Fellow, Santiago)

Desde Diciembre 14, 2016 13:15 hasta Diciembre 14, 2016 13:45

En Instituto de Astrofísica, Pontificia Universidad Católica, Vicuña Mackenna 4860, Santiago, Chile

Categorías: Seminarios

With the availability of large integral-field unit (IFU) spectral surveys of nearby galaxies, there is now the potential to extract spectral information from across the bulges and discs of galaxies in a systematic way. This information can adress questions such as how these components built up with time, how galaxies evolve and whether their evolution depends on other properties of the galaxy such as its mass or environment.
In this talk, I will present BUDDI (Bulge-Disc Decomposition of IFU data), a new approach to fit the two-dimensional light profiles of galaxies as a function of wavelength to extract the spectral properties of these galaxies' discs and bulges. The fitting is carried out using GALFITM, a modified form of GALFIT which can fit multi-waveband images simultaneously. The benefit of this technique over traditional multi-waveband photometric fits is that the stellar populations of each component can be constrained using knowledge over the whole image and spectrum available. This talk will provide an overview of the fitting process, and will finish with example stellar population analyses of early-type galaxies from the MaNGA survey to give an indication of the scientific potential of applying bulge-disc decomposition to IFU data.