120 citations · 287 across the 5 of their papers we have counts for
5 papers
Dust and Diffuse Interstellar Bands in the z_a = 0.524 Absorption System toward AO 0235+164
V. T. Junkkarinen, Ross D. Cohen, E. A. Beaver +3
We present new HST STIS NUV-MAMA and STIS CCD observations of the BL Lac object AO 0235+164 and the intervening damped Ly alpha (DLA) line at z_a = 0.524. The line profile gives N(…
Variability Tests for Intrinsic Absorption Lines in Quasar Spectra
Desika Narayanan, Fred Hamann, Tom Barlow +4
Quasar spectra have a variety of absorption lines whose origins range from energetic winds expelled from the central engines to unrelated, intergalactic clouds. We present multi-ep…
Discovery of a 2 Kpc Binary Quasar
G. A. Shields, V. Junkkarinen, E. A. Beaver +4
LBQS 01032753 is a binary quasar with a separation of only 0.3 arcsec. The projected spacing of 2.3 kpc at the distance of the source (z = 0.848) is much smaller than that of an…
LBQS 0103-2753: A 0.3 Arcsec Binary Quasar
V. Junkkarinen, G. A. Shields, E. A. Beaver +4
Imaging and spectroscopy with HST show that LBQS 0103-2753 (V = 17.8, z = 0.848) is a binary quasar with a separation of 0.3 arcsec or 2.3 kpc. This is by far the smallest separati…
The Nature and Origin of z_a~z_e Absorption Lines in the Redshift 0.20 Quasar, PKS 2135-147
Fred Hamann, E. A. Beaver, Ross D. Cohen +3
We use new UV and optical spectra and an archival HST-WFPC2 image to study the z_a~z_e absorber in the z_e = 0.20 QSO PKS 2135-147. The UV spectra, obtained with HST-FOS, show stro…