Spectral Diagnostics and Galaxy Evolution

Details Spectral Diagnostics and Galaxy Evolution Spectral Diagnostics and Galaxy Evolution

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21310301k&link_type=abstract

American Astronomical Society, AAS Meeting #213, #103.01; Bulletin of the American Astronomical Society, Vol. 41, p.297

Astronomy and Astrophysics

Astronomy

Scientific paper

Understanding how galaxies evolve from the distant past into those that we see today requires an understanding of the fundamental physical properties of galaxies as a function of redshift. Spectral line diagnostics provide valuable insight into the fundamental physical properties of galaxies, enabling the history of star formation, metallicity, and dominant excitation source to be measured over cosmic time. Large deep and wide spectroscopic surveys are now yielding diagnostic-quality spectra for thousands of galaxies to intermediate redshifts. Quantifying the fundamental physical properties of galaxies in these surveys requires an internally consistent toolkit of multi-wavelength spectral diagnostics. Such a toolkit is built with a combination of new empirical diagnostics and the latest generation of theoretical stellar evolutionary synthesis and photoionization models. I review the recent developments in empirical and theoretical emission- line diagnostic development and analysis from the UV to IR wavelengths and their application to existing large spectroscopic surveys. I will discuss the future of spectroscopic analysis and describe upcoming instruments that stand to provide deep new insights into the chemical and star formation history of the universe.

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