Dwarf Galaxies, MOND, and Relativistic Gravitation (2009)
MOND is a phenomenological modification of Newton's law of gravitation which reproduces the dynamics of galaxies, without the need for additional dark matter. This paper reviews the basics of MOND...
Quasar Feedback from WMAP and SDSS Cross-Correlation (2009)
Chatterjee, Suchetana, Ho, Shirley, Newman, Jeffrey A., Kosowsky, Arthur
We perform a cross-correlation analysis of microwave data from Wilkinson Microwave Anisotropy Probe and photometric quasars from the Sloan Digital Sky Survey, testing for Sunyaev-Zeldovich (SZ)...
A Future Test of Gravitation Using Galaxy Cluster Velocities (2009)
Kosowsky, Arthur, Bhattacharya, Suman
The accelerating expansion of the Universe at recent epochs has called into question the validity of general relativity on cosmological scales. One probe of gravity is a comparison of expansion...
Observing the Evolution of the Universe (2009)
Aguirre, James, Amblard, Alexandre, Ashoorioon, Amjad, Baccigalupi, Carlo, Balbi, Amedeo, Bartlett, James, ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed...
Menanteau, Felipe, Hughes, John P., Jimenez, Raul, Hernandez-Monteagudo, Carlos, Verde, Licia, Kosowsky, Arthur, ...
Southern Cosmology Survey III: QSO's from Combined GALEX and Optical Photometry (2008)
Jimenez, Raul, Spergel, David N., Niemack, Michael D., Menanteau, Felipe, Hughes, John P., Verde, Licia, ...
We present catalogs of QSO candidates selected using photometry from GALEX combined with SDSS in the Stripe 82 region and Blanco Cosmology Survey (BCS) near declination -55 degrees. The SDSS region...
Generation of Circular Polarization of the Cosmic Microwave Background (2008)
Alexander, Stephon, Ochoa, Joseph, Kosowsky, Arthur
The standard cosmological model, which includes only Compton scattering photon interactions at energy scales near recombination, results in zero primordial circular polarization of the cosmic...
Simulations of the Sunyaev-Zeldovich Effect from Quasars (2008)
Chatterjee, Suchetana, Di Matteo, Tiziana, Kosowsky, Arthur, Pelupessy, Inti
Quasar feedback has most likely a substantial but only partially understood impact on the formation of structure in the universe. A potential direct probe of this feedback mechanism is the...
Menanteau, Felipe, Hughes, John P., Jimenez, Raul, Hernandez-Monteagudo, Carlos, Verde, Licia, Kosowsky, Arthur, ...
We present first results from the Southern Cosmology Survey, a new multiwavelength survey of the southern sky coordinated with the Atacama Cosmology Telescope (ACT), a recently commissioned...
Primordial Magnetic Field Limits from WMAP Five-Year Data (2008)
Kahniashvili, Tina, Maravin, Yurii, Kosowsky, Arthur
A primordial magnetic field in the early universe will cause Faraday rotation of the linear polarization of the cosmic microwave background generated via Compton scattering at the surface of last...
Detectability of Gravitational Waves from Phase Transitions (2008)
Kahniashvili, Tina, Kosowsky, Arthur, Gogoberidze, Grigol, Maravin, Yurii
Gravitational waves potentially represent our only direct probe of the universe when it was less than one second old. In particular, first-order phase transitions in the early universe can generate a...
Systematic Errors in Sunyaev-Zeldovich Surveys of Galaxy Cluster Velocities (2008)
Bhattacharya, Suman, Kosowsky, Arthur
Galaxy cluster surveys compiled via the Sunyaev-Zeldovich Effect have the potential to place strong constraints on cosmology, and in particular the nature of dark energy. Here we consider cluster...
Dark Energy Constraints from Galaxy Cluster Peculiar Velocities (2007)
Bhattacharya, Suman, Kosowsky, Arthur
Future multifrequency microwave background experiments with arcminute resolution and micro-Kelvin temperature sensitivity will be able to detect the kinetic Sunyaev-Zeldovich (kSZ) effect, providing...
Effects of Quasar Feedback in Galaxy Groups (2007)
Bhattacharya, Suman, Di Matteo, Tiziana, Kosowsky, Arthur
We study the effect of quasar feedback on distributions of baryons and properties of intracluster medium in galaxy groups using high-resolution numerical simulations. We use the entropy-conserving...
The Spectrum of Gravitational Radiation from Primordial Turbulence (2007)
Gogoberidze, Grigol, Kahniashvili, Tina, Kosowsky, Arthur
Energy injection into the early universe can induce turbulent motions of the primordial plasma, which in turn act as a source for gravitational radiation. Earlier work computed the amplitude and...
The Sunyaev-Zeldovich Effect from Quasar Feedback (2007)
Chatterjee, Suchetana, Kosowsky, Arthur
The observed relationship between X-ray luminosity and temperature of the diffuse intercluster medium clearly shows the effect of nongravitational heating on the formation of galaxy clusters. Quasar...
Milgrom Relation Models for Spiral Galaxies from Two-Dimensional Velocity Maps (2007)
Barnes, Eric I., Kosowsky, Arthur, Sellwood, Jerry A.
Using two-dimensional velocity maps and I-band photometry, we have created mass models of 40 spiral galaxies using the Milgrom relation (the basis of modified Newtonian dynamics, or MOND) to...
Cosmological Constraints from Galaxy Cluster Velocity Statistics (2006)
Bhattacharya, Suman, Kosowsky, Arthur
Future microwave sky surveys will have the sensitivity to detect the kinematic Sunyaev-Zeldovich signal from moving galaxy clusters, thus providing a direct measurement of their line-of-sight...
The Atacama Cosmology Telescope Project: A Progress Report (2006)
Kosowsky, Arthur, Collaboration, For The ACT
The Atacama Cosmology Telescope is a project to map the microwave background radiation at arcminute angular resolution and high sensitivity in three frequency bands over substantial sky areas....
Impact of Systematic Errors in Sunyaev-Zel'dovich Surveys of Galaxy Clusters (2005)
Francis, Matthew R., Bean, Rachel, Kosowsky, Arthur
Future high-resolution microwave background measurements hold the promise of detecting galaxy clusters throughout our Hubble volume through their Sunyaev-Zel'dovich (SZ) signature, down to a given...
Constrained Cluster Parameters from Sunyaev-Zel'dovich Observations (2005)
Sehgal, Neelima, Kosowsky, Arthur, Holder, Gilbert
Near-future SZ surveys such as ACT, SPT, APEX, and Planck will find thousands of galaxy clusters. Multi-frequency arcminute-resolution SZ observations can, in principle, determine each cluster's gas...
Kosowsky, Arthur, Kahniashvili, Tina, Lavrelashvili, George, Ratra, Bharat
A primordial cosmological magnetic field induces Faraday rotation of the cosmic microwave background polarization. This rotation produces a curl-type polarization component even when the unrotated...
Mass Models for Spiral Galaxies from 2-D Velocity Maps (2004)
Barnes, Eric I., Sellwood, J. A., Kosowsky, Arthur
We model the mass distributions of 40 high surface brightness spiral galaxies inside their optical radii, deriving parameters of mass models by matching the predicted velocities to observed velocity...
Jimenez, Raul, Verde, Licia, Peiris, Hiranya, Kosowsky, Arthur
We improve the algorithm of Kosowsky, Milosavljevic, and Jimenez (2002) for computing power spectra of the cosmic microwave background. The present algorithm computes not only the temperature power...
The Construction of Spinors in Geometric Algebra (2004)
Francis, Matthew R., Kosowsky, Arthur
The relationship between spinors and Clifford (or geometric) algebra has long been studied, but little consistency may be found between the various approaches. However, when spinors are defined to be...
The Atacama Cosmology Telescope (2004)
The Atacama Cosmology Telescope (ACT) project is described. This multi-institution collaboration aims to produce arcminute-resolution and micro-Kelvin sensitivity maps of the microwave background...
Gravitational Lensing of the Microwave Background by Galaxy Clusters (2004)
Holder, Gilbert P., Kosowsky, Arthur
Galaxy clusters will distort the pattern of temperature anisotropies in the microwave background via gravitational lensing. We create lensed microwave background maps using clusters drawn from...
Geodesics in the Generalized Schwarzschild Solution (2003)
Francis, Matthew R., Kosowsky, Arthur
Since Schwarzshild discovered the point-mass solution to Einstein's equations that bears his name, many equivalent forms of the metric have been catalogued. Using an elementary coordinate...
Geometric Algebra Techniques for General Relativity (2003)
Francis, Matthew R., Kosowsky, Arthur
Geometric (Clifford) algebra provides an efficient mathematical language for describing physical problems. We formulate general relativity in this language. The resulting formalism combines the...
General Stationary, Spherically-Symmetric Solutions in the Gauge Theory of Gravity (2003)
Francis, Matthew R., Kosowsky, Arthur
This paper was withdrawn by the authors because it has been supplanted by gr-qc/0311007 and gr-qc/0311038.
The Future of Microwave Background Physics (2003)
The cosmic microwave background is now fulfilling its promise of determining the basic cosmological parameters describing our Universe. Future study of the microwave background will mostly be...
Effect of Internal Flows on Sunyaev-Zeldovich Measurements of Cluster Peculiar Velocities (2002)
Nagai, Daisuke, Kravtsov, Andrey V., Kosowsky, Arthur
Galaxy clusters are potentially powerful probes of the large-scale velocity field in the Universe because their peculiar velocity can be estimated directly via the kinematic Sunyaev-Zeldovich effect...
Efficient Cosmological Parameter Estimation from Microwave Background Anisotropies (2002)
Kosowsky, Arthur, Milosavljevic, Milos, Jimenez, Raul
We revisit the issue of cosmological parameter estimation in light of current and upcoming high-precision measurements of the cosmic microwave background power spectrum. Physical quantities which...
Gravitational Radiation From Cosmological Turbulence (2001)
Kosowsky, Arthur, Mack, Andrew, Kahniashvili, Tinatin
An injection of energy into the early Universe on a given characteristic length scale will result in turbulent motions of the primordial plasma. We calculate the stochastic background of...
Microwave Background Signatures of a Primordial Stochastic Magnetic Field (2001)
Mack, Andrew, Kahniashvili, Tina, Kosowsky, Arthur
A stochastic magnetic field in the early Universe will produce anisotropies in the temperature and polarization of the cosmic microwave background. We derive analytic expressions for the microwave...
The Cosmic Microwave Background (2001)
This set of lectures provides an overview of the basic theory and phenomenology of the cosmic microwave background. Topics include a brief historical review; the physics of temperature and...
Stochastic Gravitational Radiation from Phase Transitions (2001)
Kosowsky, Arthur, Mack, Andrew, Kahniashvili, Tinatin
A stochastic background of gravitational radiation from cosmological processes in the very early Universe is potentially detectable. We review the gravitational radiation which may arise from...
CMB Signatures of a Primordial Magnetic Field (2000)
Kahniashvili, Tina, Kosowsky, Arthur, Mack, Andrew, Durrer, Ruth
A primordial stochastic magnetic field will induce temperature and polarization fluctuations in the cosmic microwave background. We outline a calculation of the resulting fluctuation power spectra...
The cosmic microwave background and particle physics (1999)
Kamionkowski, Marc, Kosowsky, Arthur
In forthcoming years, connections between cosmology and particle physics will become increasingly important with the advent of a new generation of cosmic microwave background (CMB) experiments. Here,...
The Cosmic Microwave Background and Particle Physics (1999)
Kamionkowski, Marc, Kosowsky, Arthur
In forthcoming years, connections between cosmology and particle physics will be made increasingly important with the advent of a new generation of cosmic microwave background (CMB) experiments....
Introduction to Microwave Background Polarization (1999)
Microwave background polarization, though presently undetected, is a fundamental prediction of any viable cosmological model. These lectures review the theoretical description of polarization, its...
Seeing Sound Waves in the Early Universe (1998)
Temperature and polarization power spectra of the cosmic microwave background can provide essentially incontrovertible evidence for coherent acoustic oscillations in the early universe. A simple...
Efficient Computation of Hyperspherical Bessel Functions (1998)
Fast and accurate computations of the power spectrum of cosmic microwave background fluctuations are essential for comparing current and upcoming data sets with the large parameter space of viable...
Detectability of inflationary gravitational waves with microwave background polarization (1998)
Kamionkowski, Marc, Kosowsky, Arthur
Inflation predicts specific relations between the amplitudes and spectral indices of the primordial spectrum of density (scalar metric) perturbations and gravitational waves (tensor metric...
Minkowski Functional Description of Microwave Background Gaussianity (1997)
Winitzki, Serge, Kosowsky, Arthur
A Gaussian distribution of cosmic microwave background temperature fluctuations is a generic prediction of inflation. Upcoming high-resolution maps of the microwave background will allow detailed...
Statistics of cosmic microwave background polarization (1997)
Kamionkowski, Marc, Kosowsky, Arthur, Stebbins, Albert
We present a formalism for analyzing a full-sky temperature and polarization map of the cosmic microwave background. Temperature maps are analyzed by expanding over the set of spherical harmonics to...
Detectability of Inflationary Gravitational Waves with Microwave Background Polarization (1997)
Kamionkowski, Marc, Kosowsky, Arthur
Inflation predicts specific relations between the amplitudes and spectral indices of the primordial spectrum of density (scalar metric) perturbations and gravitational waves (tensor metric...
A Probe of Primordial Gravity Waves and Vorticity (1997)
Kamionkowski, Marc, Kosowsky, Arthur, Stebbins, Albert
A formalism for describing an all-sky map of the polarization of the cosmic microwave background is presented. The polarization pattern on the sky can be decomposed into two geometrically distinct...
Statistics of Cosmic Microwave Background Polarization (1996)
Kamionkowski, Marc, Kosowsky, Arthur, Stebbins, Albert
We present a formalism for analyzing a full-sky temperature and polarization map of the cosmic microwave background. Temperature maps are analyzed by expanding over the set of spherical harmonics to...
A Probe of Primordial Gravity Waves and Vorticity (1996)
Kamionkowski, Marc, Kosowsky, Arthur, Stebbins, Albert
A formalism for describing an all-sky map of the polarization of the cosmic microwave background is presented. The polarization pattern on the sky can be decomposed into two geometrically distinct...
Cosmological-parameter determination with microwave background maps (1996)
Jungman, Gerard, Kamionkowski, Marc, Kosowsky, Arthur, Spergel, David N.
The angular power spectrum of the cosmic microwave background (CMB) contains information on virtually all cosmological parameters of interest, including the geometry of the Universe (Ω), the baryon...
Determining Cosmological Parameters from the Microwave Background (1996)
Kosowsky, Arthur, Kamionkowski, Marc, Jungman, Gerard, Spergel, David N.
Recently funded satellites will map the cosmic microwave background radiation with unprecedented sensitivities and angular resolutions. Assuming only primordial adiabatic scalar and tensor...
Weighing the Universe with the Cosmic Microwave Background (1996)
Jungman, Gerard, Kamionkowski, Marc, Kosowsky, Arthur, Spergel, David N.
Variations in Ω, the total density of the Universe, leave an imprint on the power spectrum of temperature fluctuations in the cosmic microwave background (CMB). We evaluate the precision with which...
Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field (1996)
Loeb, Abraham, Kosowsky, Arthur
The existence of a primordial magnetic field at the last scattering surface may induce a measurable Faraday rotation in the polarization of the cosmic microwave background. We calculate the magnitude...
Future Cosmic Microwave Background Constraints to the Baryon Density (1996)
Kamionkowski, Marc, Jungman, Gerard, Kosowsky, Arthur, Spergel, David N.
We discuss what can be learned about the baryon density from an all-sky map of the cosmic microwave background (CMB) with sub-degree angular resolution. With only minimal assumptions about the...
Cosmological-Parameter Determination with Microwave Background Maps (1995)
Jungman, Gerard, Kamionkowski, Marc, Kosowsky, Arthur, Spergel, David N.
The angular power spectrum of the cosmic microwave background (CMB) contains information on virtually all cosmological parameters of interest, including the geometry of the Universe ($\Omega$), the...
Weighing the Universe with the Cosmic Microwave Background (1995)
Jungman, Gerard, Kamionkowski, Marc, Kosowsky, Arthur, Spergel, David N.
Variations in $\Omega$, the total density of the Universe, leave a clear and distinctive imprint on the power spectrum of temperature fluctuations in the cosmic microwave background (CMB). This...
CBR Anisotropy and the Running of the Scalar Spectral Index (1995)
Kosowsky, Arthur, Turner, Michael S.
Accurate ($\lesssim 1\% $) predictions for the anisotropy of the Cosmic Background Radiation (CBR) are essential for using future high-resolution ($\lesssim 1^\circ$) CBR maps to test cosmological...
Cosmic Microwave Background Polarization (1995)
Polarization of the cosmic microwave background, though not yet detected, provides a source of information about cosmological parameters complementary to temperature fluctuations. This paper provides...
Analysis of Small and Medium-Scale Cosmic Microwave Background Experiments (1994)
Dodelson, Scott, Kosowsky, Arthur
Anisotropies in the temperature of the cosmic microwave background have been detected on a range of scales by several different experiments. These anisotropies reflect the primordial spectrum of...
Gravitational radiation from first-order phase transitions (1994)
Kamionkowski, Marc, Kosowsky, Arthur, Turner, Michael S.
We consider the stochastic background of gravity waves produced by first-order cosmological phase transitions from two types of sources: colliding bubbles and hydrodynamic turbulence. First we...
Noise Correlation in Cosmic Microwave Background Experiments (1994)
Dodelson, Scott, Kosowsky, Arthur, Myers, Steven T.
Many analyses of microwave background experiments neglect the correlation of noise in different frequency or polarization channels. We show that these correlations, should they be present, can lead...
Primordial Nucleosynthesis in Conformal Weyl Gravity (1993)
Recently conformal Weyl gravity has been considered as a candidate alternative gravity theory. This fourth-order theory is attractive because it is the only metric theory of gravity which is...
Gravitational Radiation from First-Order Phase Transitions (1993)
Kamionkowski, Marc, Kosowsky, Arthur, Turner, Michael S.
We consider the stochastic background of gravity waves produced by first-order cosmological phase transitions from two types of sources: colliding bubbles and hydrodynamic turbulence. First we...
Kosowsky, Arthur, Turner, Michael S.
We introduce an approximation to calculate the gravitational radiation produced by the collision of true-vacuum bubbles that is simple enough to allow the simulation of a phase transition by the...