The NICMOS Snapshot Survey of Nearby Galaxies
Colina, L.; Nota, A.; Calzetti, D.; Böker, T.; Axon, D.; Sparks, W.; Bushouse, H.; Bergeron, L. E.; Daou, D.; Gilmore, D.; Holfeltz, S.; MacKenty, J.; Mazzuca, L.; Monroe, B.; Najita, J.; Noll, K.; Ritchie, C.; Schultz, A.; Sosey, M.; Storrs, A.; Suchkov, A.; StSci NICMOS Group
United States
Abstract
We present ``snapshot'' observations with the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) on board the Hubble Space Telescope (HST) of 94 nearby galaxies from the Revised Shapley Ames Catalog. Images with 0.2" resolution were obtained in two filters, a broadband continuum filter (F160W, roughly equivalent to the H band) and a narrowband filter centered on the Paα line (F187N or F190N, depending on the galaxy redshift) with the 51''×51'' field of view of the NICMOS camera 3. A first-order continuum subtraction is performed, and the resulting line maps and integrated Paα line fluxes are presented. A statistical analysis indicates that the average Paα surface brightness in the central regions is highest in early-type (Sa-Sb) spirals.