Spectrophotometric properties of galaxies: automatic measurement and analysis tools for large surveys

Details Spectrophotometric properties of galaxies: automatic measurement and analysis tools for large surveys Spectrophotometric properties of galaxies: automatic measurement and analysis tools for large surveys

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..761..421l&link_type=abstract

THE SPECTRAL ENERGY DISTRIBUTIONS OF GAS-RICH GALAXIES: Confronting Models with Data; International Workshop. AIP Conference Pr

Physics

2

Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest, Magnitudes And Colors, Luminosities, Spectroscopy And Spectrophotometry

Scientific paper

We present a new pipeline designed to derive the physical properties of emission-line galaxies from ongoing massive spectroscopic surveys (e.g. VVDS, DEEP, ...). The first tool performs a stellar continuum fitting and substraction of a large amount of spectra in a minimum waste of time. It then measures all the parameters (flux, EW, etc) of emission-lines together with the ``spectroscopic'' magnitudes and colors. The second software takes all these measurements and derive a number of physical properties like chemical abundances, dust extinction, spectral classification, etc. The pipeline is designed to be fully automatic and flexible, with many configurable options.
As an example, we show the first results of a project aiming to derive the physical properties of emission-line galaxies at intermediate redshifts (z = 0.2 ~ 1.0). We took advantage of this sample to test the efficiency of our pipeline compared to manual measurements. We also check that it will give good results on lower resolution spectra, which is the case of ongoing large surveys.

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