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Alvensleben, U. Fritze–v.; Lindner, U.; Möller, Claudia; Fricke, K. J.

doi:10.1023/a:1017592718288

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…Studies of DLAs are in line with the idea that these systems are the progenitors of present-day galaxies (e.g. Møller et al 2013;Rafelski et al 2012Rafelski et al , 2011Yin et al 2011;Zwaan et al 2005;Wolfe et al 2005;Boissier et al 2003;Fritze-v. Alvensleben et al 2001;Salucci & Persic 1999;Prochaska & Wolfe 1997). In contrast to DLAs, sub-DLAs have lower neutral gas column densities, but they are generally considered to be more metal rich than DLAs (Som et al 2013;Meiring et al 2009;Péroux et al 2007).…”

Section: Introductionsupporting

confidence: 65%

VLT/UVES observations of peculiarαabundances in a sub-DLA atz≈ 1.8 towards the quasar B1101−26

Fox¹,

Richter²,

Fechner³

2014

A&A

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We present a detailed analysis of chemical abundances in a sub-damped Lyman α absorber at z = 1.839 towards the quasar B1101−26, based on a very-high-resolution (R ∼ 75 000) and high-signal-to-noise (S /N > 100) spectrum observed with the UV Visual Echelle spectrograph (UVES) installed on the ESO Very Large Telescope (VLT). The absorption line profiles are resolved into a maximum of eleven velocity components spanning a rest-frame velocity range of ≈200 km s −1 . Detected ions include C , We calculate detailed photoionisation models for two subcomponents with Cloudy, and can rule out that ionisation effects alone are responsible for the high S/O ratio. We instead speculate that the high S/O ratio is caused by the combination of several effects, such as specific ionisation conditions in multi-phase gas, unusual relative abundances of heavy elements, and/or dust depletion in a local gas environment that is not well mixed and/or that might be related to star-formation activity in the host galaxy. We discuss the implications of our findings for the interpretation of α-element abundances in metal absorbers at high redshift.

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Section: Introductionsupporting

confidence: 65%

VLT/UVES observations of peculiarαabundances in a sub-DLA atz≈ 1.8 towards the quasar B1101−26

Fox¹,

Richter²,

Fechner³

2014

A&A

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“…More generally, the kinematics and metallicities of DLAs have been interpreted as evidence that they arise in spiral galaxies (Fritze‐von Alvensleben et al 2001; Hou, Boissier & Prantzos 2001), low surface brightness (LSB) galaxies (Jimenez, Bowen & Matteucci 1999), dwarf galaxies (Matteucci, Molaro & Vladilo 1997), the progenitors of globular clusters (Burgarella, Kissler‐Patig & Buat 2001), the building blocks of current galaxies (Tissera et al 2001), galaxies undergoing tidal stripping and mergers (Maller et al 2001), and outflows from dwarf galaxies (Schaye 2001a).…”

Section: Introductionmentioning

confidence: 99%

Damped Lyman systems and disc galaxies: number density, column density distribution and gas density

Boissier

Péroux

2003

Monthly Notices of the Royal Astronomical Society

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We present a comparison between the observed properties of damped Lyα systems (DLAs) and the predictions of simple models for the evolution of present-day disc galaxies, including both low and high surface brightness galaxies. We focus, in particular, on the number density, column density distribution and gas density of DLAs, which have now been measured in relatively large samples of absorbers. From the comparison we estimate the contribution of present-day disc galaxies to the population of damped Lyα systems, and how it varies with redshift. Based on the differences between the models and the observations, we also speculate on the nature of the fraction of DLAs that apparently do not arise in disc galaxies.

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Cited by 2 publications

References 28 publications

VLT/UVES observations of peculiarαabundances in a sub-DLA atz≈ 1.8 towards the quasar B1101−26

VLT/UVES observations of peculiarαabundances in a sub-DLA atz≈ 1.8 towards the quasar B1101−26

Damped Lyman systems and disc galaxies: number density, column density distribution and gas density

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