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Cepheids as Distance Indicators
N. R. Tanvir
We review the use of Cepheids as distance indicators with particular emphasis on the methods which have been applied to HST observations of Cepheids. The calibration of the period-…
The Metallicity Dependence of the Stellar Luminosity and Initial Mass Functions: HST Observations of Open and Globular Clusters
Ted von Hippel, Gerard Gilmore, Nial Tanvir +2
Using HST and the WFPC2 we have acquired very deep V- and I-band photometry of stars in NGC 2420 and NGC 2477 to study cluster luminosity functions at approximately solar metallici…
A Morphological Catalog of Galaxies in the Hubble Deep Field
Sidney van den Bergh, Roberto Abraham, Richard Ellis Nial Tanvir +2
We present a catalog of morphological and color data for galaxies with mag in the {\em Hubble Deep Field} (Williams et al. 1996). Galaxies have been inspected and (when po…
Galaxy morphology to I=25 mag in the Hubble Deep Field
R. G. Abraham, N. R. Tanvir, B. X. Santiago +3
The morphological properties of galaxies between in the {\em Hubble Deep Field} are investigated using a quantitative classification system based…