Citation
Rakic, O. (2012, February 7). The intergalactic medium near high-redshift galaxies. Retrieved from https://hdl.handle.net/1887/18451
Version: Corrected Publisher’s Version
License: Licence agreement concerning inclusion of doctoral thesis in the Institutional Repository of the University of Leiden
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The Intergalactic Medium near
High Redshift Galaxies
The Intergalactic Medium near High Redshift Galaxies
Proefschrift
ter verkrijging van
de graad van Doctor aan de Universiteit Leiden, op gezag van Rector Magnificus prof. mr. P.F. van der Heijden,
volgens besluit van het College voor Promoties te verdedigen op dinsdag 7 februari 2012
klokke 13.45 uur
door
Olivera Rakic geboren te Zrenjanin
in 1981
ISBN: 978-94-6191-168-1
“All that is gold does not glitter.”
(Mo, H., van den Bosch, F., White, S.: “Galaxy Formation and Evolution”)
vii
Table of contents
Chapter 1. Introduction 1
1.1 Intergalactic Medium . . . . 1
1.2 Models of the Lyα forest . . . . 2
1.2.1 The fluctuating Gunn-Peterson approximation . . . . . 2
1.2.2 Jeans approximation . . . . 5
1.3 The IGM near galaxies . . . . 7
1.4 This thesis . . . . 8
Chapter 2. Calibrating Galaxy Redshifts Using the IGM 11 2.1 Introduction . . . . 13
2.2 Data . . . . 15
2.3 Method . . . . 16
2.4 Results . . . . 19
2.4.1 Random offsets . . . . 21
2.5 Summary & Conclusions . . . . 22
Chapter 3. HI near Galaxies at z ≈ 2.4 27 3.1 Introduction . . . . 29
3.2 Data . . . . 31
3.2.1 The Keck Baryonic Structure Survey . . . . 31
3.2.2 QSO spectra . . . . 35
3.3 Pixel Optical Depths . . . . 36
3.4 Lyα Absorption near Galaxies . . . . 37
3.4.1 2-D Map of Lyα Absorption . . . . 38
3.4.2 Redshift space distortions . . . . 41
3.4.3 Lyα absorption as a function of 3-D Hubble distance . . 44
3.4.4 Lyα absorption as a function of transverse distance . . . 48
3.4.5 Interpreting PODs . . . . 52
3.5 Circum-Galactic Matter . . . . 54
3.5.1 Comparison with results for galaxy-galaxy pairs . . . . 55
3.6 The distribution of galaxies around absorbers . . . . 60
3.7 Summary & Conclusions . . . . 62
3.A The effect of redshift errors . . . . 68
3.B Correlations between data points . . . . 68
4.3.2 Measuring halo mass from 2-D absorption maps . . . . 79
4.3.3 Measuring mass from radially averaged absorption profiles 87 4.4 Redshift space anisotropies . . . . 88
4.5 Summary & Conclusions . . . . 89
4.A Convergence Tests . . . . 96
Chapter 5. Cold Flows in Absorption 101 5.1 Introduction . . . 103
5.2 Simulations . . . 106
5.2.1 Radiative transfer in post-processing . . . 107
5.2.2 Thermal history of gas particles . . . 107
5.2.3 Observing simulations . . . 108
5.3 Circum-galactic medium . . . 111
5.4 Absorption by cold flows on pMpc scales . . . 117
5.5 Physical properties of the Lyman-α absorbing gas . . . 121
5.6 Summary & Conclusions . . . 125
Nederlandse samenvatting 133 5.7 Intergalactisch Medium . . . 133
5.8 Het intergalactisch medium in de buurt van sterrenstelsels . . 134
5.9 Dit proefschrift . . . 135
Curriculum Vitae 139
