The NICMOS Snapshot Survey of nearby Galaxies

Details The NICMOS Snapshot Survey of nearby Galaxies The NICMOS Snapshot Survey of nearby Galaxies

1999-03-19

arxiv.org/abs/astro-ph/9903307v2

Astrophys.J.Suppl. 124 (1999) 95-126

Astronomy and Astrophysics

Astrophysics

Original contained error in flux calibration. Table 1 now has correct Paschen Alpha fluxes. 14 pages LaTeX with JPEG and PS fi

Scientific paper

10.1086/313253

We present ``snapshot'' observations with the NearInfrared Camera and MultiObject Spectrometer (NICMOS) on board the Hubble Space Telescope (HST) of 94 nearby galaxies from the Revised Shapley Ames Catalog. Images with 0.2 as resolution were obtained in two filters, a broad-band continuum filter (F160W, roughly equivalent to the H-band) and a narrow band filter centered on the Paschen alpha line (F187N or F190N, depending on the galaxy redshift) with the 51x51 as field of view of the NICMOS camera 3. A first-order continuum subtraction is performed, and the resulting line maps and integrated Paschen alpha line fluxes are presented. A statistical analysis indicates that the average Paschen alpha surface brightness {\bf in the central regions} is highest in early-type (Sa-Sb) spirals.

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