The Astrophysical Journal Supplement Series · 1995 · 68 citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsInfrared AstronomyObservational AstronomyNear-infrared AstronomyStellar ClassificationNear-infrared EmissionNear-infrared ObservationsNear-infrared RadiationNear-infrared SurveysPlanetary Nebulae
We present the results of a near-infrared narrowband imaging survey of planetary nebulae. Objects were selected in a way that complements similar surveys done at visible and near-infrared wavelengths. No new detections of molecular hydrogen emission were made. The H<SUB>2</SUB> is frequently found to be extended, except in young, visibly compact objects. Our results are consistent with the already determined correlation of H<SUB>2</SUB> emission with planetary nebula morphological type. Filamentary and other kinds of structures are clearly resolved in many nebulae.