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- Publications
- Influence
A Search for “Dwarf'' Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies
- L. Ho, A. Filippenko, W. Sargent
- Physics
- 11 April 1997
We have completed an optical spectroscopic survey of the nuclear regions (r < 200 pc) of a large sample of nearby galaxies. Although the main objectives of the survey are to search for low-luminosity… Expand
A Search for ``Dwarf'' Seyfert Nuclei. V. Demographics of Nuclear Activity in Nearby Galaxies
- L. Ho, A. Filippenko, W. Sargent
- Physics
- 11 April 1997
We use the sample of emission-line nuclei derived from a recently completed optical spectroscopic survey of nearby galaxies to quantify the incidence of local (z ≈ 0) nuclear activity. Particular… Expand
Mg II absorption in the spectra of 103 QSOs : implications for the evolution of gas in high-redshift galaxies
- C. Steidel, W. Sargent
- Physics
- 1 May 1992
Spectra of 103 low- and intermediate-redshift QSOs (roughly half of which are radio sources) have been obtained with a resolution of 4-6 A in order to investigate the statistics of Mg II λλ2796, 2803… Expand
The Opacity of the Lyα Forest and Implications for Ωb and the Ionizing Background
- M. Rauch, J. Miralda-Escud'e, +6 authors J. Ostriker
- Physics
- 31 December 1996
We have measured the distribution function of the flux decrement D = 1 - e-τ caused by Lyα forest absorption from intervening gas in the lines of sight to high-redshift QSOs from a sample of seven… Expand
The Chandra Deep Survey of the Hubble Deep Field-North Area. II. Results from the Caltech Faint Field Galaxy Redshift Survey Area*
- A. Hornschemeier, W. N. Brandt, +14 authors W. Sargent
- Physics
- 20 June 2001
A deep X-ray survey of the Hubble Deep Field-North (HDF-N) and its environs is performed using data collected by the Advanced CCD Imaging Spectrometer (ACIS) on board the Chandra X-Ray Observatory.… Expand
A Search for ``Dwarf'' Seyfert Nuclei. II. an Optical Spectral Atlas of the Nuclei of Nearby Galaxies
- L. Ho, A. Filippenko, W. Sargent
- Physics
- 1 June 1995
A Search for “Dwarf” Seyfert Nuclei. IV. Nuclei with Broad Hα Emission
- L. Ho, A. Filippenko, W. Sargent, C. Peng
- Physics
- 11 April 1997
We present the results of an optical spectroscopic survey designed to search for low-luminosity "dwarf" Seyfert nuclei in a magnitude-limited (BT ≤ 12.5 mag) sample of 486 bright, northern galaxies.… Expand
X-ray spectral survey with XMM-Newton of a complete sample of nearby Seyfert galaxies
- M. Cappi, F. Panessa, +15 authors K. Weaver
- Physics
- 20 September 2005
Results obtained from an X-ray spectral survey of nearby Seyfert galaxies using XMM–Newton are reported. The sample was optically selected, well defined, complete in B magnitude, and distance… Expand
The Hubble Space Telescope Quasar Absorption Line Key Project. XIV. The Evolution of Lyα Absorption Lines in the Redshift Interval z = 0-1.5*
- R. Weymann, B. Jannuzi, +10 authors A. Wolfe
- Physics
- 8 June 1998
We present the results of an analysis of the rate of evolution of the Lyα absorption lines in the redshift interval 0.0 to ~1.5 based upon a sample of 987 Lyα absorption lines identified in the… Expand
A survey of Lyman-limit absorption in the spectra of 59 high-redshift QSOs
- W. Sargent, C. Steidel, A. Boksenberg
- Physics
- 1 April 1989
The spectra of 59 QSOs are obtained with emission redshifts in the range z = 2.75-4.11 at a resolution of 4 A in the 3150-4700 A range and 6 A in the 4600-7000 A range. The objects constitute an… Expand