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28 papers · 1 filter
The Influence of Environment on the Star Formation Rates of Galaxies
Yasuhiro Hashimoto, Augustus Oemler, Huan Lin +1
We have used a sample of 15749 galaxies taken from the Las Campanas Redshift Survey to investigate the effects of environment on the rate of star formation (SFR) in galaxies. The s…
Observational discovery of the AGB-bump in densely populated color-magnitude diagrams of galaxies and star clusters
Carme Gallart
The huge photometric databases that are being created for stars in the Magellanic Clouds and in Local Group galaxies not only allow detailed study of the star formation history of…
Results on Galaxy Evolution from the CNOC2 Field Galaxy Redshift Survey
H. Lin, H. K. C. Yee, R. G. Carlberg +9
The CNOC2 Field Galaxy Redshift Survey presently contains some 5000 galaxy redshifts, plus extensive UBgRI photometry, and is the largest galaxy sample at moderate redshifts 0.1 <…
The HST Key Project on the Extragalactic Distance Scale XIII. The Metallicity Dependence of the Cepheid Distance Scale
R. Kennicutt, P. Stetson, A. Saha +22
Uncertainty in the metal abundance dependence of the Cepheid variable period- luminosity (PL) relation remains one of the outstanding sources of systematic error in the extragalact…
The Lower Main Sequence and the Orbital Period Distribution of Cataclysmic Variable Stars
J. Christopher Clemens, I. Neill Reid, John E. Gizis +1
The color-magnitude diagram of the lower main sequence, as measured from a volume-limited sample of nearby stars, shows an abrupt downward jump between Mv = 12 and 13. This jump in…
Systematic Biases in Galaxy Luminosity Functions
Julianne J. Dalcanton
Both the detection of galaxies and the derivation of the luminosity function depend upon isophotal magnitudes, implicitly in the first case, and explicitly in the latter. However,…