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Old and young bulges in late-type disk galaxies
C. M. Carollo, C. Scarlata, M. Stiavelli +2
ABRIDGED: We use HSTACS and NICMOS imaging to study the structure and colors of a sample of nine late-type spirals. We find: (1) A correlation between bulge and disks scale-lengths…
The Hubble Ultra Deep Field
Steven V. W. Beckwith, Massimo Stiavelli, Anton M. Koekemoer +12
This paper presents the Hubble Ultra Deep Field (HUDF), a one million second exposure of an 11 square minute-of-arc region in the southern sky with the Hubble Space Telescope. The…
Dust absorption along the line of sight for high-redshift objects
M. Trenti, M. Stiavelli
We estimate the optical depth distribution of dust present in absorption systems along the line of sight of high redshift galaxies and the resulting reddening. We characterize the…
Neutral gas density in Damped Lyman Alpha systems
M. Trenti, M. Stiavelli
We estimate the intrinsic neutral gas density in Damped Lyman Alpha systems () in the redshift range from the DLA SDSS DR_3 sample of o…
The James Webb Space Telescope
Jonathan P. Gardner, John C. Mather, Mark Clampin +20
The James Webb Space Telescope (JWST) is a large (6.6m), cold (50K), infrared-optimized space observatory that will be launched early in the next decade. The observatory will have…