New diagnostics for star-forming galaxies

NeIII/OII calibration with ionization parameteremail hidden; JavaScript is required 300w, http://www.emlevesque.com/wp-content/uploads/2013/11/Screen-Shot-2013-11-17-at-7.14.43-PM1-150x150.png 150w, http://www.emlevesque.com/wp-content/uploads/2013/11/Screen-Shot-2013-11-17-at-7.14.43-PM1.png 575w" sizes="(max-width: 215px) 100vw, 215px" />A paper I wrote recently with ASU graduate student  Mark Richardson has recently been accepted for publication in ApJ. Using my Starburst99/Mappings III models from 2010 combined with Mark’s new models of high-z galaxies with large ionization parameters, we calibrated a new diagnostic for ionization parameter in these galaxies, [NeIII]/[OII]. Right now the most common diagnostic for this is [OIII]/[OII], which we also re-calibrate; however, the [NeIII] diagnostic has the advantage of being insensitive to extinction effects and observable at short wavelengths (<4000A), making it usable for galaxies out to higher redshifts. Check out the manuscript to learn more about this new and useful diagnostic!