NEAR-INFRARED SPECTRA OF IC-59 63 AND NGC-1535 - COMPARING INFRARED AND ULTRAVIOLET OBSERVATIONS OF H-2/

We present observations of near-infrared H-2 line emission toward the reflection/emission nebulae, IC 59 and IC 63, and the planetary nebula , NGC 1535. Each source has been observed previously in the ultraviole t, where H-2 was detected in emission toward IC 63 and in absorption t oward NGC 1535. In IC 63, we have detected the 1.601 mu m upsilon = 6- 4 Q(1), 2.121 mu m upsilon = 1-0 S(1), and 2.247 mu m upsilon = 2-1 S( 1) lines of H-2 arising from a near-infrared fluorescent cascade follo wing ultraviolet continuum pumping. The detection marks the first time that both infrared and ultraviolet portions of the H-2 fluorescent ca scade have been measured in a region exposed to far-ultraviolet contin uum photons. Furthermore, we also report 1-0 S(1) and 2-1 S(1) fluores cent emission toward IC 59, a source previously thought to display no H-2 fluorescence and considered devoid of molecules based on ultraviol et and CO observations. Toward NGC 1535, we find no H-2 emission in th e near-infrared, in spite of the reported ultraviolet H-2 absorption.