The low-redshift Lyα forest towards 3C 273

Gerard M. Williger, Robert F. Carswell, Ray J. Weymann, Edward B. Jenkins, Kenneth R. Sembach, Todd M. Tripp, Romeel S Dave, Lutz Haberzettl, Sara R. Heap

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We present an analysis of the Ly. α forest towards 3C 273 from the Space Telescope Imaging Spectrograph at ∼7 km s. -1 resolution, along with reprocessed data from the Far Ultraviolet Spectroscopic Explorer. The high ultraviolet flux of 3C 273 allows us to probe the weak, low- z absorbers. The main sample consists of 21 H i absorbers that we could discriminate to a sensitivity of the redshift density for absorbers with is ∼ 1.5σ below the mean for other lines of sight; for, it is consistent with numerical model predictions. The Doppler parameter distribution is consistent with other low- z samples. We find no evidence for a break in the column density power-law distribution to a broad Ly. α absorber is within Δv≤ 50 km s. -1 and 1.3 local-frame Mpc of two ∼ 0.5L* galaxies, with an O vi absorber ∼700 km s. -1 away, similarly close to three galaxies and indicating overdense environments. We detect clustering on the Δv < 1000 km s. -1 scale at 3.4σ significance for, consistent with the level predicted from hydrodynamical simulations, and indication for a Ly. α forest void at 0.09 < z < 0.12. We find at least two components for the z= 0.0053 Virgo absorber, but the total column is not significantly changed.

Original languageEnglish (US)
Pages (from-to)1736-1758
Number of pages23
JournalMonthly Notices of the Royal Astronomical Society
Volume405
Issue number3
DOIs
StatePublished - Jul 2010

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absorbers
power law distribution
void
probe
prediction
galaxies
simulation
line of sight
spectrographs
radiant flux density
voids
indication
telescopes
probes
sensitivity
predictions
distribution
analysis
parameter

Keywords

  • Cosmology: observations
  • Intergalactic medium
  • Quasars: absorption lines

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Williger, G. M., Carswell, R. F., Weymann, R. J., Jenkins, E. B., Sembach, K. R., Tripp, T. M., ... Heap, S. R. (2010). The low-redshift Lyα forest towards 3C 273. Monthly Notices of the Royal Astronomical Society, 405(3), 1736-1758. https://doi.org/10.1111/j.1365-2966.2010.16519.x

The low-redshift Lyα forest towards 3C 273. / Williger, Gerard M.; Carswell, Robert F.; Weymann, Ray J.; Jenkins, Edward B.; Sembach, Kenneth R.; Tripp, Todd M.; Dave, Romeel S; Haberzettl, Lutz; Heap, Sara R.

In: Monthly Notices of the Royal Astronomical Society, Vol. 405, No. 3, 07.2010, p. 1736-1758.

Research output: Contribution to journalArticle

Williger, GM, Carswell, RF, Weymann, RJ, Jenkins, EB, Sembach, KR, Tripp, TM, Dave, RS, Haberzettl, L & Heap, SR 2010, 'The low-redshift Lyα forest towards 3C 273', Monthly Notices of the Royal Astronomical Society, vol. 405, no. 3, pp. 1736-1758. https://doi.org/10.1111/j.1365-2966.2010.16519.x
Williger GM, Carswell RF, Weymann RJ, Jenkins EB, Sembach KR, Tripp TM et al. The low-redshift Lyα forest towards 3C 273. Monthly Notices of the Royal Astronomical Society. 2010 Jul;405(3):1736-1758. https://doi.org/10.1111/j.1365-2966.2010.16519.x
Williger, Gerard M. ; Carswell, Robert F. ; Weymann, Ray J. ; Jenkins, Edward B. ; Sembach, Kenneth R. ; Tripp, Todd M. ; Dave, Romeel S ; Haberzettl, Lutz ; Heap, Sara R. / The low-redshift Lyα forest towards 3C 273. In: Monthly Notices of the Royal Astronomical Society. 2010 ; Vol. 405, No. 3. pp. 1736-1758.
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