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Resolving the Stellar Population of the Standard Elliptical Galaxy NGC3379
Michael D. Gregg, Henry C. Ferguson, Dante Minniti +2
Using the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) on board the Hubble Space Telescope, we have obtained F110W (J-band) and F160W (H-band) images of three fields…
Clustering and light profiles of galaxies in the environment of 20 Ultra Steep Spectrum Radio sources
Carlos G. Bornancini, Hector J. Martinez, Diego G. Lambas +4
We have analyzed galaxy properties in the neighborhood of 20 Ultra-Steep Spectrum Radio sources (USS) taken from the WISH catalog of De Breuck et al. (2002). Galaxies in these USS…
Long Period Variables in NGC 5128: II. Near-IR properties
M. Rejkuba, D. Minniti, D. R. Silva +1
Long Period Variable stars are ubiquitous among the bright red giant branch stars in NGC 5128. Mostly they are found to be brighter than the tip of the first ascent giant branch wi…
Kinematic Evidence for an Old Stellar Halo in the Large Magellanic Cloud
Dante Minniti, Jura Borissova, Marina Rejkuba +3
The oldest and most metal-poor Milky Way stars form a kinematically hot halo, which motivates the two major formation scenarios for our galaxy: extended hierarchical accretion and…
Photometry and Spectroscopy of GRB 030329 and Its Associated Supernova 2003dh: The First Two Months
T. Matheson, P. M. Garnavich, K. Z. Stanek +4
We present extensive optical and infrared photometry of the afterglow of gamma-ray burst (GRB) 030329 and its associated supernova (SN) 2003dh over the first two months after detec…
The MACHO Project Large Magellanic Cloud variable star inventory. XI. Frequency analysis of the fundamental mode RR Lyrae stars
C. Alcock, D. R. Alves, A. Becker +20
We have frequency analyzed 6391 variables classified earlier as fundamental mode RR Lyrae (RR0) stars in the MACHO database on the Large Magellanic Cloud (LMC). The overwhelming ma…