Local galaxies as damped Lyman-α absorber analogues

M. A. Zwaan; J. M. van der Hulst; F. H. Briggs; M. A. W. Verheijen; E. V. Ryan-Weber

doi:10.1017/S1743921305002528

Local galaxies as damped Lyman-α absorber analogues

M. A. Zwaan, J. M. van der Hulst, F. H. Briggs, M. A. W. Verheijen, E. V. Ryan-Weber

Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

We calculate in detail the expected properties of low redshift DLAs under the assumption that they arise in the gaseous disks of galaxies like those in the z≈ 0 population. A sample of 355 nearby galaxies were analysed, for which high quality H I 21-cm emission line maps are available as part of an extensive survey with the westerbork telescope (whisp). We find that expected luminosities, impact parameters between quasars and DLA host galaxies, and metal abundances are in good agreement with the observed properties of DLAs and DLA galaxies. The measured redshift number density of z=0 gas above the DLA limit is dn/dz=0.045± 0.006, which compared to higher z measurements implies that there is no evolution in the co-moving density of DLAs along a line of sight between z˜ 1.5 and z=0, and a decrease of only a factor of two from z˜ 4 to the present time. We conclude that the local galaxy population can explain all properties of low redshift DLAs.

Original language	English
Title of host publication	Probing Galaxies through Quasar Absorption Lines
Editors	Peter R. Williams, Cheng-Gang Shu, Brice Menard
Publisher	Cambridge University Press
Pages	114-119
Number of pages	6
Volume	1
DOIs	https://doi.org/10.1017/S1743921305002528
Publication status	Published - 1-Mar-2005
Event	International Astronomical Union 199 - Shanghai, China Duration: 14-Mar-2005 → 18-Mar-2005

Publication series

Name	Proceedings of the International Astronomical Union
Publisher	Cambridge University Press
Number	C199
Volume	1

Conference

Conference	International Astronomical Union 199
Country/Territory	China
City	Shanghai
Period	14/03/2005 → 18/03/2005

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Local galaxies as damped Lyman-α absorber analogues
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Zwaan, M. A., van der Hulst, J. M., Briggs, F. H., Verheijen, M. A. W., & Ryan-Weber, E. V. (2005). Local galaxies as damped Lyman-α absorber analogues. In P. R. Williams, C.-G. Shu, & B. Menard (Eds.), Probing Galaxies through Quasar Absorption Lines (Vol. 1, pp. 114-119). ( Proceedings of the International Astronomical Union; Vol. 1, No. C199). Cambridge University Press. https://doi.org/10.1017/S1743921305002528

@inproceedings{5c87aa76906a4a0f81c980ad0f795e39,

title = "Local galaxies as damped Lyman-α absorber analogues",

abstract = "We calculate in detail the expected properties of low redshift DLAs under the assumption that they arise in the gaseous disks of galaxies like those in the z≈ 0 population. A sample of 355 nearby galaxies were analysed, for which high quality H I 21-cm emission line maps are available as part of an extensive survey with the westerbork telescope (whisp). We find that expected luminosities, impact parameters between quasars and DLA host galaxies, and metal abundances are in good agreement with the observed properties of DLAs and DLA galaxies. The measured redshift number density of z=0 gas above the DLA limit is dn/dz=0.045± 0.006, which compared to higher z measurements implies that there is no evolution in the co-moving density of DLAs along a line of sight between z˜ 1.5 and z=0, and a decrease of only a factor of two from z˜ 4 to the present time. We conclude that the local galaxy population can explain all properties of low redshift DLAs.",

author = "Zwaan, {M. A.} and {van der Hulst}, {J. M.} and Briggs, {F. H.} and Verheijen, {M. A. W.} and Ryan-Weber, {E. V.}",

year = "2005",

month = mar,

day = "1",

doi = "10.1017/S1743921305002528",

language = "English",

volume = "1",

series = " Proceedings of the International Astronomical Union",

publisher = "Cambridge University Press",

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pages = "114--119",

editor = "{ Williams}, { Peter R.} and Shu, {Cheng-Gang } and { Menard}, {Brice }",

booktitle = "Probing Galaxies through Quasar Absorption Lines",

note = "International Astronomical Union 199 ; Conference date: 14-03-2005 Through 18-03-2005",

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Zwaan, MA, van der Hulst, JM, Briggs, FH, Verheijen, MAW & Ryan-Weber, EV 2005, Local galaxies as damped Lyman-α absorber analogues. in PR Williams, C-G Shu & B Menard (eds), Probing Galaxies through Quasar Absorption Lines. vol. 1, Proceedings of the International Astronomical Union, no. C199, vol. 1, Cambridge University Press, pp. 114-119, International Astronomical Union 199, Shanghai, China, 14/03/2005. https://doi.org/10.1017/S1743921305002528

Local galaxies as damped Lyman-α absorber analogues. / Zwaan, M. A.; van der Hulst, J. M.; Briggs, F. H. et al.
Probing Galaxies through Quasar Absorption Lines. ed. / Peter R. Williams; Cheng-Gang Shu; Brice Menard. Vol. 1 Cambridge University Press, 2005. p. 114-119 ( Proceedings of the International Astronomical Union; Vol. 1, No. C199).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Local galaxies as damped Lyman-α absorber analogues

AU - Zwaan, M. A.

AU - van der Hulst, J. M.

AU - Briggs, F. H.

AU - Verheijen, M. A. W.

AU - Ryan-Weber, E. V.

PY - 2005/3/1

Y1 - 2005/3/1

N2 - We calculate in detail the expected properties of low redshift DLAs under the assumption that they arise in the gaseous disks of galaxies like those in the z≈ 0 population. A sample of 355 nearby galaxies were analysed, for which high quality H I 21-cm emission line maps are available as part of an extensive survey with the westerbork telescope (whisp). We find that expected luminosities, impact parameters between quasars and DLA host galaxies, and metal abundances are in good agreement with the observed properties of DLAs and DLA galaxies. The measured redshift number density of z=0 gas above the DLA limit is dn/dz=0.045± 0.006, which compared to higher z measurements implies that there is no evolution in the co-moving density of DLAs along a line of sight between z˜ 1.5 and z=0, and a decrease of only a factor of two from z˜ 4 to the present time. We conclude that the local galaxy population can explain all properties of low redshift DLAs.

AB - We calculate in detail the expected properties of low redshift DLAs under the assumption that they arise in the gaseous disks of galaxies like those in the z≈ 0 population. A sample of 355 nearby galaxies were analysed, for which high quality H I 21-cm emission line maps are available as part of an extensive survey with the westerbork telescope (whisp). We find that expected luminosities, impact parameters between quasars and DLA host galaxies, and metal abundances are in good agreement with the observed properties of DLAs and DLA galaxies. The measured redshift number density of z=0 gas above the DLA limit is dn/dz=0.045± 0.006, which compared to higher z measurements implies that there is no evolution in the co-moving density of DLAs along a line of sight between z˜ 1.5 and z=0, and a decrease of only a factor of two from z˜ 4 to the present time. We conclude that the local galaxy population can explain all properties of low redshift DLAs.

U2 - 10.1017/S1743921305002528

DO - 10.1017/S1743921305002528

M3 - Conference contribution

VL - 1

T3 - Proceedings of the International Astronomical Union

SP - 114

EP - 119

BT - Probing Galaxies through Quasar Absorption Lines

A2 - Williams, Peter R.

A2 - Shu, Cheng-Gang

A2 - Menard, Brice

PB - Cambridge University Press

T2 - International Astronomical Union 199

Y2 - 14 March 2005 through 18 March 2005

ER -

Local galaxies as damped Lyman-α absorber analogues

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