The NICMOS snapshot survey of nearby galaxies

Citation
T. Boker et al., The NICMOS snapshot survey of nearby galaxies, ASTROPH J S, 124(1), 1999, pp. 95-126
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
ISSN journal
0067-0049 → ACNP
Volume
124
Issue
1
Year of publication
1999
Pages
95 - 126
Database
ISI
SICI code
0067-0049(199909)124:1<95:TNSSON>2.0.ZU;2-B
Abstract
We present "snapshot" observations with the Near-Infrared Camera and Multi- Object Spectrometer (NICMOS) on board the Hubble Space Telescope (HST) of 9 4 nearby galaxies from the Revised Shapley Ames Catalog. Images with 0." 2 resolution were obtained in two filters, a broadband continuum filter (F160 W, roughly equivalent to the H band) and a narrowband filter centered on th e Pa alpha line (F187N or F190N, depending on the galaxy redshift) with the 51 " x 51 " held of view of the NICMOS camera 3. A first-order continuum s ubtraction is performed, and the resulting line maps and integrated Pa alph a line fluxes are presented. A statistical analysis indicates that the aver age Pa alpha surface brightness in the central regions is highest in early- type (Sa-Sb) spirals.