6 papers
GOODS, UDF, and the evolution of early-type galaxies
I. Ferreras, T. Lisker, A. Pasquali +3
The HST/ACS images of GOODS-South have been used to select a sample of early-type galaxies, based on morphology and on the Kormendy relation. The classification scheme does not use…
A multi-wavelength study of the starburst galaxy NGC 7673
Paola Castangia, Anna Pasquali, Piero Benvenuti
HST/WFPC2 images resolved NGC 7673 into a large number of star clusters. Among these, 31 fall inside the IUE large aperture, which was used to acquire an integrated ultraviolet spe…
Flat-fielding of ACS WFC grism data
N. Pirzkal, A. Pasquali, J. Walsh
In direct imaging, broad band flat-fields can easily be applied to correct deviation from uniform sensitivity across the detector field. However for slitless spectroscopy data the…
The Wavelength Calibration of the WFC grism
A. Pasquali, N. Pirzkal, J. R. Walsh
We present the wavelength solution derived for the G800L grism with the Wide Field Channel from the spectra of two Galactic Wolf-Rayet stars, WR 45 and WR 96. The data were acquire…
A near-infrared survey for Galactic Wolf-Rayet stars
N. L. Homeier, R. D. Blum, P. S. Conti +1
Initial results, techniques, and rationale for a near-infrared survey of evolved emission-line stars toward the Galactic Center are presented. We use images taken through narrow-ba…
Wolf-Rayet nebulae as tracers of stellar ionizing fluxes: I. M1-67
P. A. Crowther, A. Pasquali, O. De Marco +3
We use WR124 (WN8h) and its associated nebula M1-67, to test theoretical non-LTE models for Wolf-Rayet (WR) stars. Lyman continuum ionizing flux distributions derived from a stella…