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Detection of Massive Forming Galaxies at Redshifts Greater than One
Lennox L. Cowie, Esther M. Hu, Antoinette Songaila
The complex problem of when and how galaxies formed has not until recently been susceptible of direct attack. It has been known for some time that the excessive number of blue gala…
Astrophysical Limits on the Evolution of Dimensionless Physical Constants over Cosmological Time
Lennox L. Cowie, Antoinette Songaila
We report new upper limits on any possible long-term time variation of the ratio of the electron to proton masses, , the fine-structure constant, (), and the quantity…
Faintest Galaxy Morphologies from WFPC2 Imaging of the Hawaii Survey Fields
Lennox L. Cowie, Esther M. Hu, Antoinette Songaila
We present very deep WFPC2 images in the F814W filter of two Hawaii Survey fields, SSA13 and SSA22. Using these data with previous ground-based imaging and spectroscopy, we c…
The Distribution of Column Densities and b Values in the Lyman-Alpha Forest
Esther M. Hu, Tae-Sun Kim, Lennox L. Cowie +2
We describe the properties of the Ly forest in the column density range $\nhi \geq 2\times10^{12}$ cm based on 1056 lines in the wavelength range 4300--5100Åmeasured in e…