7 papers
Cluster Evolution Since z~1
R. Demarco, J. P. Blakeslee, H. C. Ford +8
We have used the Advanced Camera for Surveys (ACS) on the HST to obtain optical imaging of a sample of 8 galaxy clusters in the redshift range 0.8 < z < 1.3. The ACS data provides…
Star Formation in the W49A Molecular Cloud: Birth of a Massive Star Cluster
N. L. Homeier, J. Alves
The W49A star-forming region is embedded in a 10^6 solar mass molecular cloud, one of the most massive in our Galaxy. It has been long known as one of the most luminous radio HII r…
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…
Starbursts and the Evolution of Gas-Rich Galaxies
John S. Gallagher, Christopher J. Conselice, Lynn D. Matthews +1
Moderately luminous starbursts in the nearby universe often occur in disk galaxies that are at most subject to mild external perturbations. An investigation of this type of galaxy…
The emission nebula associated with V1974 Cyg: a unique object?
R. Casalegno, M. Orio, J. Mathis +6
Through a program of narrow band imaging, we have observed the changing structure of the H alpha emission line around Nova Cyg 1992 (V1974 Cyg) at regular intervals from 1996 to 19…
Patterns of Super Star Cluster Formation in `Clumpy' Starburst Galaxies
J. S. Gallagher, N. L. Homeier, C. J. Conselice +1
We present preliminary results from a Hubble Space Telescope (HST) WFPC2 investigation of spatial and temporal distributions of star clusters in the clumpy irregular galaxy NGC 767…