The VLT LBG redshift survey - VI. Mapping HI in the proximity of z ~ 3 LBGs with X-Shooter

R. M. Bielby, T. Shanks, N. H.M. Crighton, C. G. Bornancini, L. Infante, D. G. Lambas, D. Minniti, S. L. Morris, P. Tummuangpak

Resultado de la investigación: Article

5 Citas (Scopus)

Resumen

We present an analysis of the spatial distribution and dynamics of neutral hydrogen gas around galaxies using new X-Shooter observations of z ~ 2.5-4 quasars. Adding the X-Shooter data to our existing data set of high-resolution quasar spectroscopy, we use a total sample of 29 quasars alongside ~1700 Lyman Break Galaxies (LBGs) in the redshift range 2 ≲ z ≲ 3.5. We measure the Lyα forest auto-correlation function, finding a clustering length of s0 = 0.081 ± 0.006 h-1 Mpc, and the cross-correlation function with LBGs, finding a crossclustering length of s0 = 0.27 ± 0.14 h-1 Mpc and power-law slope γ = 1.1 ± 0.2. Our results highlight the weakly clustered nature of neutral hydrogren systems in the Lyα forest. Building on this, we make a first analysis of the dependence of the clustering on absorber strength, finding a clear preference for stronger Lyα forest absorption features to be more strongly clustered around the galaxy population, suggesting that they trace on average higher mass haloes. Using the projected and 2-D cross-correlation functions, we constrain the dynamics of Lyα forest clouds around z ~ 3 galaxies. We find a significant detection of large-scale infall of neutral hydrogen, with a constraint on the Lyα forest infall parameter of βF = 1.02 ± 0.22.

Idioma originalEnglish
Páginas (desde-hasta)2174-2186
Número de páginas13
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen471
N.º2
DOI
EstadoPublished - 1 ene 2017

Huella dactilar

proximity
galaxies
quasars
cross correlation
hydrogen
cloud forest
autocorrelation
power law
spectroscopy
spatial distribution
halos
absorbers
slopes
gas
high resolution
gases
analysis

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Bielby, R. M., Shanks, T., Crighton, N. H. M., Bornancini, C. G., Infante, L., Lambas, D. G., ... Tummuangpak, P. (2017). The VLT LBG redshift survey - VI. Mapping HI in the proximity of z ~ 3 LBGs with X-Shooter. Monthly Notices of the Royal Astronomical Society, 471(2), 2174-2186. https://doi.org/10.1093/MNRAS/STX1772
Bielby, R. M. ; Shanks, T. ; Crighton, N. H.M. ; Bornancini, C. G. ; Infante, L. ; Lambas, D. G. ; Minniti, D. ; Morris, S. L. ; Tummuangpak, P. / The VLT LBG redshift survey - VI. Mapping HI in the proximity of z ~ 3 LBGs with X-Shooter. En: Monthly Notices of the Royal Astronomical Society. 2017 ; Vol. 471, N.º 2. pp. 2174-2186.
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abstract = "We present an analysis of the spatial distribution and dynamics of neutral hydrogen gas around galaxies using new X-Shooter observations of z ~ 2.5-4 quasars. Adding the X-Shooter data to our existing data set of high-resolution quasar spectroscopy, we use a total sample of 29 quasars alongside ~1700 Lyman Break Galaxies (LBGs) in the redshift range 2 ≲ z ≲ 3.5. We measure the Lyα forest auto-correlation function, finding a clustering length of s0 = 0.081 ± 0.006 h-1 Mpc, and the cross-correlation function with LBGs, finding a crossclustering length of s0 = 0.27 ± 0.14 h-1 Mpc and power-law slope γ = 1.1 ± 0.2. Our results highlight the weakly clustered nature of neutral hydrogren systems in the Lyα forest. Building on this, we make a first analysis of the dependence of the clustering on absorber strength, finding a clear preference for stronger Lyα forest absorption features to be more strongly clustered around the galaxy population, suggesting that they trace on average higher mass haloes. Using the projected and 2-D cross-correlation functions, we constrain the dynamics of Lyα forest clouds around z ~ 3 galaxies. We find a significant detection of large-scale infall of neutral hydrogen, with a constraint on the Lyα forest infall parameter of βF = 1.02 ± 0.22.",
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Bielby, RM, Shanks, T, Crighton, NHM, Bornancini, CG, Infante, L, Lambas, DG, Minniti, D, Morris, SL & Tummuangpak, P 2017, 'The VLT LBG redshift survey - VI. Mapping HI in the proximity of z ~ 3 LBGs with X-Shooter', Monthly Notices of the Royal Astronomical Society, vol. 471, n.º 2, pp. 2174-2186. https://doi.org/10.1093/MNRAS/STX1772

The VLT LBG redshift survey - VI. Mapping HI in the proximity of z ~ 3 LBGs with X-Shooter. / Bielby, R. M.; Shanks, T.; Crighton, N. H.M.; Bornancini, C. G.; Infante, L.; Lambas, D. G.; Minniti, D.; Morris, S. L.; Tummuangpak, P.

En: Monthly Notices of the Royal Astronomical Society, Vol. 471, N.º 2, 01.01.2017, p. 2174-2186.

Resultado de la investigación: Article

TY - JOUR

T1 - The VLT LBG redshift survey - VI. Mapping HI in the proximity of z ~ 3 LBGs with X-Shooter

AU - Bielby, R. M.

AU - Shanks, T.

AU - Crighton, N. H.M.

AU - Bornancini, C. G.

AU - Infante, L.

AU - Lambas, D. G.

AU - Minniti, D.

AU - Morris, S. L.

AU - Tummuangpak, P.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - We present an analysis of the spatial distribution and dynamics of neutral hydrogen gas around galaxies using new X-Shooter observations of z ~ 2.5-4 quasars. Adding the X-Shooter data to our existing data set of high-resolution quasar spectroscopy, we use a total sample of 29 quasars alongside ~1700 Lyman Break Galaxies (LBGs) in the redshift range 2 ≲ z ≲ 3.5. We measure the Lyα forest auto-correlation function, finding a clustering length of s0 = 0.081 ± 0.006 h-1 Mpc, and the cross-correlation function with LBGs, finding a crossclustering length of s0 = 0.27 ± 0.14 h-1 Mpc and power-law slope γ = 1.1 ± 0.2. Our results highlight the weakly clustered nature of neutral hydrogren systems in the Lyα forest. Building on this, we make a first analysis of the dependence of the clustering on absorber strength, finding a clear preference for stronger Lyα forest absorption features to be more strongly clustered around the galaxy population, suggesting that they trace on average higher mass haloes. Using the projected and 2-D cross-correlation functions, we constrain the dynamics of Lyα forest clouds around z ~ 3 galaxies. We find a significant detection of large-scale infall of neutral hydrogen, with a constraint on the Lyα forest infall parameter of βF = 1.02 ± 0.22.

AB - We present an analysis of the spatial distribution and dynamics of neutral hydrogen gas around galaxies using new X-Shooter observations of z ~ 2.5-4 quasars. Adding the X-Shooter data to our existing data set of high-resolution quasar spectroscopy, we use a total sample of 29 quasars alongside ~1700 Lyman Break Galaxies (LBGs) in the redshift range 2 ≲ z ≲ 3.5. We measure the Lyα forest auto-correlation function, finding a clustering length of s0 = 0.081 ± 0.006 h-1 Mpc, and the cross-correlation function with LBGs, finding a crossclustering length of s0 = 0.27 ± 0.14 h-1 Mpc and power-law slope γ = 1.1 ± 0.2. Our results highlight the weakly clustered nature of neutral hydrogren systems in the Lyα forest. Building on this, we make a first analysis of the dependence of the clustering on absorber strength, finding a clear preference for stronger Lyα forest absorption features to be more strongly clustered around the galaxy population, suggesting that they trace on average higher mass haloes. Using the projected and 2-D cross-correlation functions, we constrain the dynamics of Lyα forest clouds around z ~ 3 galaxies. We find a significant detection of large-scale infall of neutral hydrogen, with a constraint on the Lyα forest infall parameter of βF = 1.02 ± 0.22.

KW - Cosmology: observations

KW - Galaxies: kinematics and dynamics

KW - Intergalactic medium

KW - Large-scale structure of Universe

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U2 - 10.1093/MNRAS/STX1772

DO - 10.1093/MNRAS/STX1772

M3 - Article

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VL - 471

SP - 2174

EP - 2186

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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ER -