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Stellar populations across the NGC4244 truncated galactic disk
Roelof S. de Jong, A. C. Seth, D. J. Radburn-Smith +12
We use HST/ACS to study the resolved stellar populations of the nearby, nearly edge-on galaxy NGC4244 across its outer disk surface density break. The stellar photometry allows us…
GHOSTS: The Resolved Stellar Outskirts of Massive Disk Galaxies
Roelof S. de Jong, A. C. Seth, E. F. Bell +10
We show initial results from our ongoing HST GHOSTS survey of the resolved stellar envelopes of 14 nearby, massive disk galaxies. In hierarchical galaxy formation the stellar halos…
HD 97048's Circumstellar Environment as Revealed by a HST/ACS Coronagraphic Study of Disk Candidate Stars
R. L. Doering, M. Meixner, S. T. Holfeltz +5
We present the results of a coronagraphic scattered-light imaging survey of six young disk candidate stars using the Hubble Space Telescope Advanced Camera for Surveys. The observa…
Dynamical Masses of Young Stars in Multiple Systems
G. H. Schaefer, M. Simon, E. Nelan +1
We present recent measurements of the orbital motion in the young binaries DF Tau and ZZ Tau, and the hierarchical triple Elias 12, that were obtained with the Fine Guidance Sensor…
The NICMOS Snapshot Survey of nearby Galaxies
T. Boeker, D. Calzetti, W. Sparks
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 Rev…