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The combination of detections of anisotropy in the Cosmic Microwave Background radiation and observations of the large-scale distribution of galaxies probes the primordial density fluctuations of the universe on spatial scales varying by three orders of magnitude. These data are found to be inconsistent with the predictions of several popular cosmological(More)
This paper presents chemical abundance measurements for 37 damped Lyα systems at z > 2.5 observed with the Echellette Spectrograph and Imager on the Keck II telescope. We measure the H I column densities of these damped systems through Voigt profile fits to their Lyα profiles and we implement the apparent optical depth method to determine ionic column(More)
We present new chemical abundance measurements of 16 damped Lyα systems at z > 1.5 and update our previous abundance analyses. The entire database presented here was derived from HIRES observations on the Keck I telescope, reduced with the same software package, and analysed with identical techniques. Altogether, we present a large, homogeneous database of(More)
We report on the identification of the highest redshift submillimetre-selected source currently known: LESS J033229.4−275619. This source was detected in the Large Apex BOlometer CAmera (LABOCA) Extended Chandra Deep Field South (ECDFS) Sub-millimetre Survey (LESS), a sensitive 870-µm survey (σ 870µm ∼ 1.2 mJy) of the full 30 ′ × 30 ′ ECDFS with the LABOCA(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. ABSTRACT We determine star formation rates (SFRs) in a sample of(More)
We summarize the theoretical and observational status of the study of the Cosmic Microwave Background radiation. Its thermodynamic spectrum is a robust prediction of the Hot Big Bang cosmology and has been confirmed observationally. There are now 76 observations of Cosmic Microwave Background anisotropy, which we present in a table with references. We(More)
Observations of damped Lyα systems offer a unique window on the neutral-gas reservoirs that gave rise to galaxies at high redshifts. This review focuses on critical properties such as the H I and metal content of the gas and on independent evidence for star formation. Together, these provide an emerging picture of gravitationally bound objects in which(More)
This paper describes the acquisition and analysis of imaging data for the identification of galaxies associated with z ∼ 4 damped Lyα systems. We present deep BRI images of three fields known to contain four z ∼ 4 damped systems. We discuss the reduction and calibration of the data, detail the color criteria used to identify z ∼ 4 galaxies, and present a(More)
Ongoing and near-future imaging-based dark energy experiments are critically dependent upon photo-metric redshifts (a.k.a. photo-z's): i.e., estimates of the redshifts of objects based only on flux information obtained through broad filters. Higher-quality, lower-scatter photo-z's will result in smaller random errors on cosmological parameters; while(More)