Studying the Evolution of Field Galaxies Using NICMOS/HST Parallel Imaging And Grism Data (2007)
L. Yan, P. J. Mccarthy, R. J. Weymann
Abstract. We present results from our analysis of F160W NICMOS Parallel images. These data cover 9 sq. arcminutes and reach 3oe depths of H = 24.3 \Gamma 25.5 in a 0:6 00 diameter aperture with...
The Low-Redshift Lyman Alpha Forest toward PKS 0405-123 (2005)
Williger, G. M., Heap, S. R., Weymann, R. J., Dave, R., Ellingson, E., Carswell, R. F., ...
We present STIS 7km/s resolution data of the Ly-a forest toward PKS0405-123 (z=0.574). We make two samples. The strong sample (60 systems) has column density logNHI>13.3 over 0.002
Discovery of a Dwarf Post-Starburst Galaxy Near a High Column Density Ly-alpha Absorber (2004)
Stocke, J. T., Keeney, B. A., McLin, K. M., Rosenberg, J. L., Weymann, R. J., Giroux, M. L.
We report the discovery of a dwarf (M_B = -13.9) post-starburst galaxy coincident in recession velocity (within uncertainties) with the highest column density absorber (N_HI = 10^15.85 cm^{-2} at cz...
The Local Lyman-Alpha Forest: Absorbers in Galaxy Voids (2002)
McLin, Kevin M., Stocke, John T., Weymann, R. J., Penton, Steven V., Shull, J. Micheal
We have conducted pointed redshift surveys for galaxies in the direction of bright AGN whose HST far-UV spectra contain nearby (cz
The Heavy Element Enrichment of Lyman alpha Clouds in the Virgo Supercluster (2002)
Tripp, T. M., Jenkins, E. B., Williger, G. M., Heap, S. R., Bowers, C. W., Danks, A. C., ...
Using high S/N STIS echelle spectra (FWHM=7 km/s) of 3C 273, we constrain the metallicities of two Lya clouds in the vicinity of the Virgo cluster. We detect C II, Si II, and Si III absorption lines...
The Metallicity of the Local IGM from the HST/STIS Spectrum of 3C273 (2001)
Davé, Romeel, Heap, S. R., Williger, G. M., Weymann, R. J., Tripp, T. M., Jenkins, E. B.
We present a preliminary study of the metallicity of low-redshift Lyman alpha absorbers from the HST/STIS spectrum of 3C273. Using a pixel-based shift-and-coadd technique, we compare observations to...
HST/STIS Spectroscopy of 3C 273 (2001)
Heap, S. R., Williger, G. M., Dave, R., Weymann, R. J., Jenkins, E. B., Tripp, T. M.
We present preliminary results on the low-redshift Lyman alpha forest as based on STIS spectra of 3C 273. A total of 121 intergalactic Lyman alpha-absorbing systems were detected, of which 60 are...
A New Observational Upper Limit to the Low Redshift Ionizing Background Radiation (2001)
Weymann, R. J., Vogel, S. N., Veilleux, S., Epps, H. W.
We report a new Fabry-Perot search for Halpha emission from the intergalactic cloud HI 1225+01 in an attempt to measure the low redshift ionizing background radiation. We set a new 2 sigma upper...
High Resolution Spectra of Quasar AALs: 3C 191 (2001)
Hamann, Frederick W., Barlow, T. A., Chaffee, F. C., Foltz, C. B., Weymann, R. J.
We discuss new high-resolution (6.7 km/s) spectra of the associated absorption lines (AALs) in the radio-loud quasar 3C 191. The measured AALs have ionizations ranging from Mg I to N V, and...
AB Dor in '94: I. HST/GHRS Observations of the Quiescent Chromosphere of an Active Star (2000)
Brandt, J. C., Heap, S. R., Walter, F. M., Beaver, E. A., Boggess, A., Carpenter, K. G., ...
We analyze HST/GHRS spectra of AB Doradus, the prototypical ultra-rapidly rotating K dwarf. We observed chromospheric (Mg II) and transition region (C II, Si IV, C IV, and N V) lines periodically...
High-Resolution Keck Spectra of the Associated Absorption Lines in 3C 191 (2000)
Hamann, Frederick W., Barlow, T. A., Chaffee, F. C., Foltz, C. B., Weymann, R. J.
Associated absorption lines (AALs) are valuable probes of the gaseous environments near quasars. Here we discuss high-resolution (6.7 km/s) spectra of the AALs in the radio-loud quasar 3C 191...
Extremely Red Objects from the NICMOS/HST Parallel Imaging Survey (2000)
Yan, Lin, McCarthy, P. J., Weymann, R. J., Malkan, M. A., Teplitz, H. I., Storrie-Lombardi, L. J., ...
We present a catalog of extremely red objects discovered using the NICMOS/HST parallel imaging database and ground-based optical follow-up observations. Within an area of 16 square arc-minutes, we...
McIntosh, D. H., Rieke, M. J., Foltz, C. B., Weymann, R. J.
We have obtained H-band spectra of 32 luminous quasars at 2.0
Keck Spectroscopy and NICMOS Photometry of a Redshift z=5.60 Galaxy (1998)
Weymann, R. J., Stern, D., Bunker, A., Spinrad, H., Chaffee, F. H., Thompson, R. I., ...
We present Keck LRIS spectroscopy along with NICMOS F110W (~J) and F160W (~H) images of the galaxy HDF4-473.0 (hereafter 4-473) in the Hubble Deep Field, with a detection of an emission line...
Jannuzi, B. T., Hartig, G. F., Kirhakos, S., Sargent, W. L. W., Turnshek, D. A., Weymann, R. J., ...
We report the discovery of a high-ionization broad absorption line system at a redshift of z_abs=0.695 in the spectrum of the z_em=1.052 radio-quiet quasar PG 2302+039. Broad absorption with FWHM...
HST key project: quasar absorption lines (1995)
Stengler-Larrea, E A, Boksenberg, A, Steidel, C C, Sargent, W L W, Bahcall, J N, Bergeron, J, ...
The Environment of Lyman a Absorbers in the Sightline toward 3C273 (1993)
Morris, S. L., Weymann, R. J., Dressler, Alan, McCarthy, P. J., Smith, B. A., Terrile, R. J., ...
We present new ground-based data following up on the HST discovery of low-redshift Lya absorption in the sight-line to the quasar 3C273. Narrow-band filter observations show that there are no H II...
A spectroscopic study of UM 673 A and B - On the size of Lyman-alpha clouds (1992)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Chaffee, F H, Weymann, R J, ...
The Ly-alpha forest spectra obtained for the A and B images of the gravitationally lensed high-redshift quasar UM 673 are investigated, and higher resolution data of the brightest (A) image are...
A Spectroscopic Study of UM673 A &B: on the size of Lyman- alpha Clouds (1991)
Smette, A, Surdej, Jean, Shaver, P A, Foltz, C B, Chaffee, F H, Weymann, R J, ...
Quasar Absorption Lines, Proceedings of the ESO Mini-Workshop held
Photocopy of typescript. Ann Arbor, Mich. : University Microfilms, 1976.--20 cm.