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 Davé; Lutz Haberzettl; Sara R. Heap

doi:10.1111/j.1365-2966.2010.16519.x

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 Davé, Lutz Haberzettl, Sara R. Heap

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	1736-1758
Number of pages	23
Journal	Monthly Notices of the Royal Astronomical Society
Volume	405
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2010.16519.x
Publication status	Published - 1 Jul 2010

Keywords

Cosmology: observations
Intergalactic medium
Quasars: absorption lines

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10.1111/j.1365-2966.2010.16519.x

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title = "The low-redshift Lyα forest towards 3C 273",

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.",

keywords = "Cosmology: observations, Intergalactic medium, Quasars: absorption lines",

author = "Williger, {Gerard M.} and Carswell, {Robert F.} and Weymann, {Ray J.} and Jenkins, {Edward B.} and Sembach, {Kenneth R.} and Tripp, {Todd M.} and Romeel Dav{\'e} and Lutz Haberzettl and Heap, {Sara R.}",

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AU - Williger, Gerard M.

AU - Carswell, Robert F.

AU - Weymann, Ray J.

AU - Jenkins, Edward B.

AU - Sembach, Kenneth R.

AU - Tripp, Todd M.

AU - Davé, Romeel

AU - Haberzettl, Lutz

AU - Heap, Sara R.

PY - 2010/7/1

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N2 - 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.

AB - 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.

KW - Cosmology: observations

KW - Intergalactic medium

KW - Quasars: absorption lines

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -

The low-redshift Lyα forest towards 3C 273

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