3D Spectrum of Galaxies
A galaxy is a composite system in 3 spatial dimensions (3D). I am now combining the SDSS data to reconstruct galaxy spectra in 3D, a concept I came up with recently in order to understand galaxies in a new dimension.
Inclination Effect on Galaxy Properties
Average spectrum of SDSS disk galaxies as a function of inclination. There are systematic changes in the flux density across all wavelengths with the disk inclination, suggesting the presence of dust in the galaxies. This effect impacts our measurement of galaxy properties, including star formation rate and photometric redshift.
The derivation of galaxy properties from their spectroscopy or photometry primarily relies on parameter estimation. Recently I have developed the N-dimensional Grid approach to describe simultaneously multiple stellar population parameters. Interpolation can be carried out on-the-fly to obtain modeled spectra at fine parameter resolutions.
Other ThingsGalaxy Eigenspectra
1 Angstrom Resolution Galaxy Atlas
SDSS-III DR8 Photo-z
Laszlo's Spectrum Services