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Title:
A catalogue of absorption lines in eight Hubble Space Telescope/STIS E230M 1.0 < z < 1.7 quasar spectra
Authors:
Milutinović, N.; Misawa, T.; Lynch, R. S.; Masiero, J. R.; Palma, C.; Charlton, J. C.; Kirkman, D.; Bockenhauer, S.; Tytler, D.
Affiliation:
AA(Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA; Department of Physics & Astronomy, University of Victoria, Elliott Building, 3800 Finnerty Road, Victoria, BC, Canada V8P 5C2), AB(Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA), AC(Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA; Department of Astronomy, PO Box 400325, University of Virginia, Charlottesville, VA 22904, USA), AD(Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA; Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA), AE(Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA), AF(Department of Astronomy & Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, USA), AG(Center for Astrophysics and Space Sciences, University of California, San Diego, MS 0424, La Jolla, CA 92093-0424, USA), AH(Center for Astrophysics and Space Sciences, University of California, San Diego, MS 0424, La Jolla, CA 92093-0424, USA), AI(Center for Astrophysics and Space Sciences, University of California, San Diego, MS 0424, La Jolla, CA 92093-0424, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 382, Issue 3, pp. 1094-1104. (MNRAS Homepage)
Publication Date:
12/2007
Origin:
MNRAS
MNRAS Keywords:
intergalactic medium, quasars: absorption lines
DOI:
10.1111/j.1365-2966.2007.12097.x
Bibliographic Code:
2007MNRAS.382.1094M

Abstract

We have produced a catalogue of line identifications and equivalent width measurements for all absorption features in eight ultraviolet echelle quasar spectra. These spectra were selected as having the highest signal-to-noise ratio among the Hubble Space Telescope/STIS spectra obtained with the E230M grating. We identify 56 metal-line systems towards the eight quasars, and present plots of detected transitions, aligned in velocity space. We found that about 1/4-1/3 of the features in the Lyα forest region, redward of the incidence of the Lyβ forest, are metal lines. High-ionization transitions are common. At the redshift range we study, z < 1.7, we see both OVI and CIV in 88-90 per cent of the metal-line systems for which the spectra cover the expected wavelength. SiIII is seen in 58 per cent, while low-ionization absorption in CII, SiII and/or AlII is detected in 50 per cent of the systems for which they are covered. This catalogue will facilitate future studies of the Lyα forest and of metal-line systems of various types.

Based on observations obtained with the NASA/ESA Hubble Space Telescope, which is operated by the Space Telescope Science Institute (STScI) for the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5D26555.

E-mail: milni@uvic.ca (NM); misawa@astro.psu.edu (TM); rsl4v@ virginia.edu (RSL); masiero@ifa.hawaii.edu (JRM); cpalma@astro.psu.edu (CP); charlton@astro.psu.edu (JCC); dkirkman@ucsd.edu (DK); sbockenhauer@wisc.edu (SB): tytler@ucsd.edu (DT)

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