Alexander Potekhin, Er V. Ivanchik, Dmitry A. Varshalovich, Kenneth M. Lanzetta, Jack A. Baldwin, Gerard M. Williger, ...
Multidimensional cosmologies allow for variations of fundamental physical constants over the course of cosmological evolution, and different versions of the theories predict different time...
What is the Total Deuterium Abundance in the Local Galactic Disk? (2007)
Linsky, Jeffrey L., Draine, Bruce T., Moos, H. W., Jenkins, Edward B., Wood, Brian E., Oliveira, Cristina, ...
Analyses of spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, together with spectra from the Copernicus and IMAPS instruments, reveal an unexplained very wide range...
What is the Total Deuterium Abundance in the Local Galactic Disk? (2006)
Linsky, Jeffrey L., Draine, Bruce T., Moos, H. W., Jenkins, Edward B., Wood, Brian E., Oliveira, Cristina, ...
Analyses of spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, together with spectra from the Copernicus and IMAPS instruments, reveal an unexplained very wide range...
Ultraviolet-Bright, High-Redshift ULIRGS (2005)
Colbert, James W., Teplitz, Harry, Francis, Paul, Palunas, Povilas, Williger, Gerard M., Woodgate, Bruce
We present Spitzer Space Telescope observations of the z=2.38 lya-emitter over-density associated with galaxy cluster J2143-4423, the largest known structure (110 Mpc) above z=2. We imaged 22 of the...
Chen, Hsiao-Wen, Prochaska, Jason X., Weiner, Benjamin J., Mulchaey, John S., Williger, Gerard M.
We present a pilot study of the clustering properties of Lya absorbers with respect to known galaxies based on 112 Lya absorbers and 482 galaxies identified at z= 14 shows a comparable strength to...
The Distribution of Ly-alpha-Emitting Galaxies at z=2.38: Paper 2, Spectroscopy (2004)
Francis, Paul J., Palunas, Povilas, Teplitz, Harry I., Williger, Gerard M., Woodgate, Bruce E.
In Paper 1 of this series we identified an 80 co-moving Mpc filament of candidate Lyman-alpha emitting galaxies at redshift 2.38. In this paper we present spectroscopy of the 37 galaxy candidates....
Two New Low Galactic D/H Measurements from FUSE (2004)
Wood, Brian E., Linsky, Jeffrey L., Hebrard, Guillaume, Williger, Gerard M., Moos, H. Warren, Blair, William P.
We analyze interstellar absorption observed towards two subdwarf O stars, JL 9 and LSS 1274, using spectra taken by the Far Ultraviolet Spectroscopic Explorer (FUSE). Column densities are measured...
Low-Metallicity Gas Clouds in a Galaxy Proto-Cluster at Redshift 2.38 (2004)
Francis, Paul J., Williger, Gerard M.
We present high resolution spectroscopy of a QSO whose sight-line passes through the halo of a pair of elliptical galaxies at redshift 2.38. This pair of galaxies probably lies at the center of a...
The Distribution of Lya-Emitting Galaxies at z=2.3 (2003)
Palunas, Povilas, Teplitz, Harry I., Francis, Paul J., Williger, Gerard M., Woodgate, Bruce E.
We present the detection of 34 Ly-alpha emission-line galaxy candidates in a 80x80x60 co-moving Mpc region surrounding the known z=2.38 galaxy cluster J2143-4423. The space density of Ly-alpha...
HST/STIS observations of the HeII Gunn-Peterson effect towards HE 2347-4342 (2000)
Smette, Alain, Heap, Sara R., Williger, Gerard M., Tripp, Todd M., Jenkins, Edward B., Songaila, Antoinette
We present an HST STIS spectrum of the HeII Gunn-Peterson effect towards HE2347-4342. Compared to the previous HST GHRS data obtained by Reimers et al. (1997), the STIS spectrum has a much improved...
Wide Field Imaging of the Hubble Deep Field-South Region I: Quasar Candidates (2000)
Palunas, Povilas, Collins, Nicholas R., Gardner, Jonathan P., Hill, Robert S., Malumuth, Eliot M., Smette, Alain, ...
We present candidate quasars from a multi-color (uBVRI + narrow-band) imaging survey of 1/2 square degree around the Hubble Deep Field - South. We identify 154 candidate quasars with B < 23 using...
Limits on the star formation rates of z>2 damped Ly-alpha systems from H-alpha spectroscopy (1999)
Bunker, Andrew J., Warren, Stephen J., Clements, D. L., Williger, Gerard M., Hewett, Paul C.
We present the results of a long-slit K-band spectroscopic search for H-alpha emission from eight damped Ly-alpha absorbers (DLAs) at z>2 with the goal of measuring the star-formation rates in these...
Limits on the star formation rates of z>2 damped Ly-alpha systems from H-alpha spectroscopy (1998)
Bunker, Andrew J., Warren, Stephen J., Clements, D. L., Williger, Gerard M., Hewett, P. C.
We present the results of a long-slit K-band spectroscopic search with CGS4 on UKIRT for H-alpha emission from the objects responsible for high-redshift (z > 2) damped Ly-alpha absorption systems....
HST imaging of the globular clusters in the Fornax Cluster: NGC 1399 and NGC 1404 (1998)
Forbes, Duncan A., Grillmair, Carl J., Williger, Gerard M., Elson, Rebecca A. W., Brodie, Jean P.
The Fornax cluster galaxies NGC 1399 and NGC 1404 are ideal for studying the effects of a cluster environment on globular cluster systems. Here we present new optical imaging of these two galaxies...
HST imaging of the globular clusters in the Fornax Cluster: NGC 1379 (1998)
Elson, Rebecca A. W., Grillmair, Carl J., Forbes, Duncan A., Rabban, Mike, Williger, Gerard M., Brodie, Jean P.
We present B and I photometry for ∼300 globular cluster candidates in NGC 1379, an E0 galaxy in the Fornax cluster. Our data are from both Hubble Space Telescope (HST) and ground-based...
HST imaging of the globular clusters in the Fornax Cluster: NGC 1399 and NGC 1404 (1998)
Forbes, Duncan A., Grillmair, Carl J., Williger, Gerard M., Elson, Rebecca A. W., Brodie, Jean P.
The Fornax cluster galaxies NGC 1399 and NGC 1404 are ideal for studying the effects of a cluster environment on globular cluster systems. Here we present new optical imaging of these two galaxies...
HST imaging of the globular clusters in the Fornax Cluster: NGC 1379 (1998)
Elson, Rebecca A. W., Grillmair, Carl J., Forbes, Duncan A., Rabban, Mike, Williger, Gerard M., Brodie, Jean P.
We present B and I photometry for ∼300 globular cluster candidates in NGC 1379, an E0 galaxy in the Fornax cluster. Our data are from both Hubble Space Telescope (HST) and ground-based...
HST Imaging of the Globular Clusters in the Fornax Cluster: NGC 1379 (1997)
Elson, Rebecca A. W., Grillmair, Carl J., Forbes, Duncan A., Rabban, Mike, Williger, Gerard. M., Brodie, Jean P.
We present B and I photometry for ~300 globular cluster candidates in NGC 1379, an E0 galaxy in the Fornax Cluster. Our data are from both Hubble Space Telescope (HST) and ground-based observations....
Optical Light Curves of the Type Ia Supernovae 1990N and 1991T (1997)
Lira, P., Suntzeff, Nicholas B., Phillips, M. M., Hamuy, Mario, Maza, Jose, Schommer, R. A., ...
We present UBVRI light curves for the bright Type Ia supernovae SN 1990N in NGC 4639 and SN 1991T in NGC 4527 based on photometry gathered in the course of the Calan/Tololo supernova program. Both...