– Testing power electronics in high radiation environments – Hot star Teff, logg from spectroscopy • MS, PhD in Physics (Univ. of Toledo – Ohio) – Extended Red Emission in the Diffuse ISM – Dust radiative transfer – Echelle spectroscopy of stars with 1m telescope • Postdoc, Geoff Clayton (Louisiana State Univ) – Extinction curves, grant writing, observing • Research staff, George Rieke (Univ. of Arizona) – Instrumentation, data reduction pipelines • Astronomer (STScI)
– SMC: 5→20 (bumps rare) – M31/M33 (like MW) • Near- & Mid-IR – NIR: in prep (Decleir et al.) – MIR: submitted (Gordon et al.) Gordon et al. (2009, ApJ, 705, 1320) Gordon et al. (2003, ApJ, 594, 279) Extension to 912 A – still rising! LMC/SMC do not follow MW R(V) relation Gordon et al. (2021, ApJ, submitted) First true diffuse ISM average – lower than recent lit
of Arizona • 8 years – 4 before launch, 4 after • Instrument team data reduction pipeline lead – MIPS DAT (Gordon et al. 2005) – Team included Chad Engelbracht, Karl Misselt, Jane Morrison, James Muzerolle • Lead the 70 micron absolute flux calibration (Gordon et al. 2007) • Lots of science – Focused on nearby galaxies
– Extended Red Emission – Photoluminescence – Present in diffuse ISM – Carbonaceous grains? – Silicon nanoparticles? • New feature (1.5 micron) – Iron? • JWST GTO/ERS – Excitation wavelengths For aromatic/PAHs, aliphatics, new features! Gordon et al. (2000, ApJ, 544, 859) NW filament in reflection nebula NGC 7023
years • Early years included all instrument aspects – Operations, user interaction, data reduction • Now focus on data reduction and calibration – Lead of JWST Baseline Pipeline → algorithms for all instruments – Lead of JWST AbsFlux WG → flux & surface brightness/flux calibration for all instruments
Broken Emissivity model better than lots of cold dust See also: Roman-Duval et al. (2014, 2017) Chastenet et al. (2017, 2019, 2021) Clark et al. (2021)
104) Baysian Extinction And Stellar Tool Focused on fitting millions of SEDs of stars in nearby galaxies PHAT, SMIDGE, Scylla, ... https://github.com/BEAST-Fitting/beast https://github.com/BEAST-Fitting/megabeast Broad wavelength coverage breaks degeneracies
Provided the tool I’ve always wanted to handle (correlated) data uncertainties – Priors allow for quantifying assumptions – BEAST/MegaBEAST, DustBFF, DGFit, … • Distributed coding – DIRTY early example (two coders) – BEAST the forcing function – Python in Astronomy meeting – Skill, not just tools