The present-day galaxy population in spiral galaxies
Reynier Peletier (Kapteyn Astronomical Institute, Groningen)
TL;DR
This paper reviews modern methods and recent findings on the stellar populations, dust content, and star formation histories of spiral galaxies, highlighting advances in spectral analysis techniques.
Contribution
It introduces new analysis methods for integrated spectra of spiral galaxies and summarizes recent insights into their stellar and dust components.
Findings
Advances in spectral analysis improve understanding of spiral galaxy populations.
Radial stellar population gradients reveal galaxy formation processes.
Stellar populations in sigma drops indicate complex central dynamics.
Abstract
Although there are many more stellar population studies of elliptical and lenticular galaxies, studies of spiral galaxies are catching up, due to higher signal to noise data on one hand, and better analysis methods on the other. Here I start by discussing some modern methods of analyzing integrated spectra of spiral galaxies, and comparing them with traditional methods. I then discuss some recent developments in our understanding of the stellar content of spiral galaxies, and their associated dust content. I discuss star formation histories, radial stellar population gradients, and stellar populations in sigma drops.
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