I'm a Staff Scientist at the Spitzer Space Telescope / Science Center, and a member of the InfraRed Spectrograph Instrument Support Team. My research interests center on the interstellar medium of our Galaxy. I have studied cloud structure and chemistry, and specialized in the class of nearby molecular clouds called the high-latitude translucent clouds. For an introduction to these concepts, see the introduction to my thesis, published in 1999.
My most recent work involves quantitative measurements of the structure of extended emission in the Galaxy measured as part of the Spitzer Galactic First Look Survey. The initial analysis of a field in the Gum Nebula (see Fig. 1 below), where we first measure a break in the 24/25 micron power spectrum, was published in Ingalls et al. 2004. We believe the power spectrum break represents the transition from a 3D structure at small scales to a 2D structure at large scales. This is evidence that the medium is stretched into thin sheets, possibly by supernova explosions. Analysis of all 10 survey maps finds many cases of a similar break. In addition, the medium appears isotropic (the spectral statistics look the same from all directions). We speculate that all diffuse H i gas is arranged into statistically isotropic sheets that follow Kolmogorov scaling (see Ingalls et al. 2005).
Of interest to extragalactic astronomers may be the confusion noise analysis that I contributed to Burgdorf et al. (2005).
Click here for a full publications list.