Abstract
Rubin developed widely used physical models of interstellar clouds of gas ionized by nearby hot stars. His work provided evidence for the previously unsuspected presence of hot stars in the vicinity of the Galactic Center.
Highlights
Hjellming, was interested in the physics of H II regions — interstellar clouds of gas ionized by nearby hot stars
In 1980 Bob moved to NASA Ames where he began modeling H II regions to interpret measurements of far infrared emission made from the Kuiper Airborne Observatory (KAO) by Ed Erickson’s group
To further our understanding of the structure and composition of ionized nebulae, Bob devised observing programs to measure spectral lines from Galactic and extra-galactic sources to compare with his models. More recently he worked to deduce the unobservable extreme ultra-violet spectral energy distributions of hot stars that are critical to the relevant physics in these nebulae
Summary
Hjellming, was interested in the physics of H II regions — interstellar clouds of gas ionized by nearby hot stars. Robert (“Bob”) Rubin died on Sunday March 3, 2013. Bob’s thesis included a detailed model for the photoionization and thermal structure of an H II region.
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