Understanding Galaxy Evolution Through Emission Lines

Understanding Blazar Jets Through Their Multifrequency Emission

Being dominated by non-thermal (synchrotron and inverse Compton) emission from a relativistic jet, blazars offer important clues to the structure and radiative processes in extragalactic jets. Crucial information is provided by blazars’ spectral energy distributions from radio to gamma-rays (GeV and TeV energies), their trends with bolometric luminosity, and their correlated variability propert...

Emission-line Diagnostics of Galaxy Evolution with Ngst

As a byproduct of its search for the first star forming galaxies, NGST will obtain high-quality spectra for thousands of galaxies in the redshift range z = 0 − 6 and beyond. Most of the galaxies will possess strong emission-line spectra, and these spectra will provide a wealth of quantititative information on their star formation rates, reddening, metal abundances, internal kinematics, and nucl...

Review: Understanding Galaxy Formation and Evolution with Long Wavelength Observations

It is well established in the local Universe that regions of high star-formation rate are dusty. As a result of this physical causal link, galaxies of increasing current star formation activity emit a larger proportion of their bolometric luminosity via dust absorption and re-radiation in the thermal midto far-infrared. Several new observations indicate that this trend continues back to earlier...

The evolution of emission lines in H ii galaxies

We constructed diagnostic diagrams using emission line ratios and equivalent widths observed in several independent samples of H ii galaxies. Significant trends are seen, both in the line ratio diagrams, and in diagrams relating line ratios to the equivalent width of Hβ. The diagrams are compared to predictions from photoionization models for evolving starbursts. This study extends the work of ...

Galaxy Evolution