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Signatures of Stellar Reionization of the Universe
Zoltan Haiman, Abraham Loeb
The high ionization level and universal metallicity (1% solar) of the intergalactic gas at redshifts z<5 implies that nonlinear structure had started to form in the universe at ear…
Gravitational Lensing of the X-Ray Background by Clusters of Galaxies
Alexandre Refregier, Abraham Loeb
Gravitational lensing by clusters of galaxies affects the cosmic X-ray background (XRB) by altering the observed density and flux distribution of background X-ray sources. At faint…
Effect of Gravitational Lensing on Measurements of the Sunyaev-Zel'dovich Effect
Abraham Loeb, Alexandre Refregier
The Sunyaev-Zel'dovich (SZ) effect of a cluster of galaxies is usually measured after background radio sources are removed from the cluster field. Gravitational lensing by the clus…
Destruction of Molecular Hydrogen During Cosmological Reionization
Zoltan Haiman, Martin Rees, Abraham Loeb
We investigate the ability of primordial gas clouds to retain molecular hydrogen (H_2) during the initial phase of the reionization epoch. We find that before the Stromgren spheres…
Dynamical Mass Estimates of Large-Scale Filaments in Redshift Surveys
Daniel J. Eisenstein, Abraham Loeb, Edwin L. Turner
We propose a new method to measure the mass of large-scale filaments in galaxy redshift surveys. The method is based on the fact that the mass per unit length of isothermal filamen…
Microwave Background Anisotropies Due to the Kinematic Sunyaev-Zel'dovich Effect of the Lyman-alpha Forest
Abraham Loeb
The Lyman-alpha absorption systems observed in the spectra of QSOs are likely to possess bulk peculiar velocities. The free electrons in these systems scatter the microwave backgro…