Browsing Faculty of Arts and Sciences by Keyword "Cosmology"
Now showing items 1-9 of 9
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The complex optical to soft x-ray spectrum of the low-redshift radio-quiet quasars
(IOP Publishing, 1994)Eight high signal-to-noise ROSAT Position Sensitive Proportional Counter (PSPC) observations of six low-redshift (o.048 less than z less than 0.155) radio-quiet quasars have been analyzed to study ant soft excess. All the ... -
Dark Begets Light: Exploring Physics Beyond the Standard Model with Cosmology
(2023-05-12)After nearly a century of inquiry, the particle nature of dark matter remains unknown. As a wide array of Dark Matter (DM) phenomenologies map onto similar variations in cosmological observ- ables, cosmology places ... -
The Keck Array: A Multi Camera CMB Polarimeter at the South Pole
(Springer Nature, 2012)The Keck array is a new multi-camera Cosmic Microwave Background (CMB) polarimeter. Each camera contains 256 polarization pairs of antenna-coupled transition edge sensor (TES) bolometers. We recently deployed three of five ... -
Light Curves of Type Ia Supernovae and Preliminary Cosmological Constraints from the ESSENCE Survey
(2013-09-30)The ESSENCE survey discovered 213 type Ia supernovae at redshifts 0.10 < z < 0.81 between 2002 and 2008. We present their R and I band light curve measurements, obtained using the MOSAIC II imager at the CTIO 4 m, along ... -
Modeling Spatially and Spectrally Resolved Observations to Diagnose the Formation of Elliptical Galaxies
(2013-09-30)In extragalactic astronomy, a central challenge is that we cannot directly watch what happens to galaxies before and after they are observed. This dissertation focuses on linking predictions of galaxy time-evolution directly ... -
Modeling the Evolution of Galaxy Properties across Cosmic Time with Numerical Simulations
(2014-06-06)We present a series of numerical galaxy formation studies which apply new numerical methods to produce increasingly realistic galaxy formation models. We first investigate the metallicity evolution of a large set of ... -
Modest Methods on the Edge of Cosmic Revolution: Foundational Work to Test Outstanding Peculiarities in the ΛCDM Cosmology
(2022-01-19)The ΛCDM cosmology has proven to be a robust model of the Universe, matching a diversity of cosmic probes. However, the ongoing ambiguity of the true nature of both dark matter (DM) and dark energy (DE) and some small ... -
Searching for Dark Matter in the Early and Late Universe
(2021-05-19)The particle nature of dark matter is a defining problem of modern particle physics, arguably the most blatant and most elusive sign of physics beyond the Standard Model. Over the past decades, it has also become a proving ... -
String Theory and its Applications in Cosmology and Particle Physics
(2022-05-18)Finding experimental signatures of string theory is a central problem in modern physics. Recently, this problem has been revived in the context of the Swampland program. The purpose of this program is to identify the set ...