The distribution of Lyα-emitting galaxies at z = 2.38

Povilas Palunas; Harry I. Teplitz; Paul J. Francis; Gerard M. Williger; Bruce E. Woodgate

doi:10.1086/381145

The distribution of Lyα-emitting galaxies at z = 2.38

Povilas Palunas^*, Harry I. Teplitz, Paul J. Francis, Gerard M. Williger, Bruce E. Woodgate

^*Corresponding author for this work

Research output: Contribution to journal › Review article › peer-review

94 Citations (Scopus)

Abstract

We present the detection of 34 Lyα emission-line galaxy candidates in a 80 × 80 × 60 comoving Mpc region surrounding the known z = 2.38 galaxy cluster J2143-4423. The space density of Lyα emitters is comparable to that found by Steidel et al. when targeting a cluster at redshift 3.09, which is a factor of 5.8 × 2.5 greater than that found by field samples at similar redshifts. The distribution of these galaxy candidates contains several 5-10 Mpc scale voids. We compare our observations with mock catalogs derived from the VIRGO consortium ACDM n-body simulations. Fewer than 1% of the mock catalogs contain voids as large as we observe. Our observations thus tentatively suggest that the galaxy distribution at redshift 2.38 contains larger voids than predicted by current models. Three of the candidate galaxies and one previously discovered galaxy have the large luminosities and extended morphologies of "Lyα blobs".

Original language	English
Pages (from-to)	545-554
Number of pages	10
Journal	Astrophysical Journal
Volume	602
Issue number	2 I
DOIs	https://doi.org/10.1086/381145
Publication status	Published - 20 Feb 2004

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title = "The distribution of Lyα-emitting galaxies at z = 2.38",

abstract = "We present the detection of 34 Lyα emission-line galaxy candidates in a 80 × 80 × 60 comoving Mpc region surrounding the known z = 2.38 galaxy cluster J2143-4423. The space density of Lyα emitters is comparable to that found by Steidel et al. when targeting a cluster at redshift 3.09, which is a factor of 5.8 × 2.5 greater than that found by field samples at similar redshifts. The distribution of these galaxy candidates contains several 5-10 Mpc scale voids. We compare our observations with mock catalogs derived from the VIRGO consortium ACDM n-body simulations. Fewer than 1% of the mock catalogs contain voids as large as we observe. Our observations thus tentatively suggest that the galaxy distribution at redshift 2.38 contains larger voids than predicted by current models. Three of the candidate galaxies and one previously discovered galaxy have the large luminosities and extended morphologies of {"}Lyα blobs{"}.",

keywords = "Cosmology: observations, Galaxies: evolution, Galaxies: fundamental parameters",

author = "Povilas Palunas and Teplitz, {Harry I.} and Francis, {Paul J.} and Williger, {Gerard M.} and Woodgate, {Bruce E.}",

year = "2004",

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TY - JOUR

T1 - The distribution of Lyα-emitting galaxies at z = 2.38

AU - Palunas, Povilas

AU - Teplitz, Harry I.

AU - Francis, Paul J.

AU - Williger, Gerard M.

AU - Woodgate, Bruce E.

PY - 2004/2/20

Y1 - 2004/2/20

N2 - We present the detection of 34 Lyα emission-line galaxy candidates in a 80 × 80 × 60 comoving Mpc region surrounding the known z = 2.38 galaxy cluster J2143-4423. The space density of Lyα emitters is comparable to that found by Steidel et al. when targeting a cluster at redshift 3.09, which is a factor of 5.8 × 2.5 greater than that found by field samples at similar redshifts. The distribution of these galaxy candidates contains several 5-10 Mpc scale voids. We compare our observations with mock catalogs derived from the VIRGO consortium ACDM n-body simulations. Fewer than 1% of the mock catalogs contain voids as large as we observe. Our observations thus tentatively suggest that the galaxy distribution at redshift 2.38 contains larger voids than predicted by current models. Three of the candidate galaxies and one previously discovered galaxy have the large luminosities and extended morphologies of "Lyα blobs".

AB - We present the detection of 34 Lyα emission-line galaxy candidates in a 80 × 80 × 60 comoving Mpc region surrounding the known z = 2.38 galaxy cluster J2143-4423. The space density of Lyα emitters is comparable to that found by Steidel et al. when targeting a cluster at redshift 3.09, which is a factor of 5.8 × 2.5 greater than that found by field samples at similar redshifts. The distribution of these galaxy candidates contains several 5-10 Mpc scale voids. We compare our observations with mock catalogs derived from the VIRGO consortium ACDM n-body simulations. Fewer than 1% of the mock catalogs contain voids as large as we observe. Our observations thus tentatively suggest that the galaxy distribution at redshift 2.38 contains larger voids than predicted by current models. Three of the candidate galaxies and one previously discovered galaxy have the large luminosities and extended morphologies of "Lyα blobs".

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Galaxies: fundamental parameters

UR - http://www.scopus.com/inward/record.url?scp=2142737536&partnerID=8YFLogxK

U2 - 10.1086/381145

DO - 10.1086/381145

M3 - Review article

SN - 0004-637X

VL - 602

SP - 545

EP - 554

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

The distribution of Lyα-emitting galaxies at z = 2.38

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