Publications

Selected Publications

Undergraduate students supervised by Daly are indicated by (US), and graduate students are indicated by (GS)

Black Hole Spin and Accretion Disk Magnetic Field Strength Estimates for more than 750 AGN and multiple GBH
R. A. Daly, 2019, ApJ, in press.

A Fundamental Line of Black Hole Activity
R. A. Daly, D. A. Stout (US), & J. N. Mysliwiec (US), 2018, ApJ, 863, 117-122.

Spin properties of supermassive black holes with powerful outflows
R. A. Daly, 2016, MNRAS, 458, L24 – L28.

Black hole spin properties of 130 AGN
R. A. Daly & T. B. Sprinkle (US), 2014, MNRAS, 438, 3233-3242.

The Relationship between Beam Power and Radio Power for Classical Double Radio Sources
R. A. Daly, T. B. Sprinkle (US), C. P. O’Dea, P. Kharb, & S. A. Baum, 2012, MNRAS, 423, 2498 – 2502.

Estimates of Black Hole Spin Properties of 55 Sources
R. A. Daly, 2011, MNRAS, 414, 1253 – 1262.

A Detailed Study of the Lobes of Eleven Powerful Radio Galaxies
R. A. Daly, P. Kharb, C. P. O’Dea, S. A. Baum, M. P. Mory (US), J. McKane (US), C. Altenderfer (US), & M. Beury (US) 2010, ApJS, 187, 1-63.

A Decade of Dark Energy: 1998 – 2008
Retrospective Presented at the 2008 UCLA Symposium “Dark Matter and Dark Energy in the Universe” R. A. Daly, 2009, in the proceedings of the 2008 UCLA conference “Dark Matter and Dark Energy in the Universe,” AIP

Bounds on Black Hole Spins
R. A. Daly, 2009, ApJ, 696, L32-36.

Black Hole Spins of Radio Sources
R. A. Daly, 2009, ApJ, 691, L72-76.

Physical Properties of Very Powerful FRII Radio Galaxies
C. P. O’Dea, R. A. Daly, K. A. Freeman (US), P. Kharb, & S. Baum 2009, A&A, 494, 471-488.

Cosmological Studies with Radio Galaxies and Supernovae
R. A. Daly, M. P. Mory (US), C. P. O’Dea, P. Kharb, S. Baum, E. J. Guerra, & S. G. Djorgovski 2009, ApJ, 691, 1058-1067.

Improved Constraints on the Acceleration History of the Universe and the Properties of the Dark Energy
R. A. Daly, S. G. Djorgovski, K. A. Freeman (US), M. P. Mory (US), C. P. O’Dea, P. Kharb, & S. Baum, 2008, ApJ, 677, 1-11.

A Study of 13 Powerful Classical Double Radio Galaxies
P. Kharb, C. P. O’Dea, S. A. Baum, R. A. Daly, M. P. Mory (US), M. Donahue, & E. J. Guerra, 2008, ApJS, 174, 74-110.

A Nearly Model-Independent Characterization of Dark Energy Properties as a Function of Redshift
Ruth A. Daly & S. G. Djorgovski, 2006, NuPhS, 173, 19 – 23.

Constraints on the Physical Parameters of the Dark Energy Using a Model-Independent Approach
Ruth A. Daly & S. G. Djorgovski, 2005, (arXiv:astro-ph/0512576)

Direct Determinations of the Redshift Behavior of the Pressure, Energy Density, and Equation of State of the Dark Energy and the Acceleration of the Universe
Ruth A. Daly & S. G. Djorgovski, 2005, International Journal of Modern Physics A, 20 (6): 1113-1120.

Radio Galaxies and the Acceleration of the Universe Beyond a Redshift of One
Ruth A. Daly, 2005, Keynote Invited Presentation, Advances in Space Research, Volume 35, Issue 1, Mars International Reference Atmosphere, Living with a Star and Fundamental Physics, eds. L. Zasova, J.T. Hoeksema, R.V. Duncan and T.J. Sumner, (Elsevier Ltd), 116-121.                        (arXiv:astro-ph/0212107)

Direct Constraints on the Properties and Evolution of Dark Energy
Ruth A. Daly & S. G. Djorgovski, 2005, Invited Presentation, “Observing Dark Energy,” ASP Conference Series, Vol. 339, eds. Sidney C. Wolff and Tod R. Lauer (San Francisco: Astronomical Society of the Pacific), 117-127.

Comparison of Radio Observations and Numerical Simulations of the Radio Lobes of Cygnus A
Joel C. Carvalho, Ruth A. Daly, Matthew P. Mory (US), & Christopher P. O’Dea, 2005, the Astrophysical Journal (ApJ), 620, 126-144.

Direct Determination of the Kinematics of the Universe and Properties of the Dark Energy as Functions of Redshift
Ruth A. Daly & S. G. Djorgovski, 2004, ApJ, 612, 652-659.

Global Cosmological Parameters Determined Using Classical Double Radio Galaxies
Ruth A. Daly and Erick J. Guerra, 2003, Invited Presentation, “The Dark Universe: Matter, Energy, and Gravity,” eds. M. Livio & M. Fall (Cambridge: Cambridge University Press), 77-96.

A Model-Independent Determination of the Expansion and Acceleration Rates of the Universe as a Function of Redshift and Constraints on Dark Energy
Ruth A. Daly & S. G. Djorgovski 2003, ApJ, 597, 9-20.

Radio Galaxy Redshift-Angular Size Data Constraints on Dark Energy
Silviu Podariu, Ruth A. Daly, Matthew P. Mory (US), and Bharat Ratra 2003, ApJ, 584, 577-579.

Constraints on the Cluster Environments and Hot Spot Magnetic Field Strengths of the Radio Sources 3C 280 and 3C 254
Megan Donahue, Ruth A. Daly, and Donald J. Horner 2003, ApJ, 584, 643-656.

Quintessence, Cosmology, and Fanaroff-Riley Type IIb Radio Galaxies
Ruth A. Daly, and Erick J. Guerra 2002, AJ, 124, 1831-1838.

High-Redshift Radio Galaxies as a Cosmological Tool: Exploration of a Key Assumption and Comparison with Supernova Results
Ruth A. Daly, Matthew P. Mory (US), and Erick J. Guerra 2002, Invited Presentation, in Cosmology and Elementary Particle Physics, ed. B. N. Kursunoglu, S. L. Mintz, and A. Perlmutter (New York: AIP), 87-94.

Models Developed to Describe FRIIb and FRIIa Radio Sources
Ruth A. Daly, 2002, Invited Presentation, NewAR, 46, 47-60.

Global Cosmological Parameters Determined Using Classical Double Radio Galaxies
Erick J. Guerra (GS), Ruth A. Daly, & Lin Wan (GS), 2000, ApJ, 544, 659-670.

Empirical Determinations of Key Physical Parameters Related to Classical Double Radio Sources
Lin Wan (GS), Ruth A. Daly, & Erick J. Guerra (GS), 2000, ApJ, 544, 671-685.

A Detailed Investigation of Projection Effects Relevant to the Study of Powerful Classical Double Radio Sources
Lin Wan (GS), Ruth A. Daly, 1998, ApJ, 499,614-634.

A Detailed Investigation of Radio Power Selection Effects Relevant to the Study of Classical Double Radio Sources
Lin Wan (GS), Ruth A. Daly, 1998, ApJS, 115, 141-162.

Global Cosmological Parameters Measured Using Classical Double Radio Sources
Ruth A Daly, E. J. Guerra (GS), & Lin Wan (GS), 1998, in “Fundamental Parameters in Cosmology”, The proceedings of the XXXIIIrd Rencontres de Moriond, eds. J. Tran Thanh Van & Y. Giraud-Heraud, (Paris, France: Editions Frontieres), 323 – 326.

Updated Estimates of Global Cosmological Parameters Determined Using Classical Double Radio Galaxies
E. J. Guerra (GS), Ruth A. Daly, & Lin Wan (GS), 1998, astro-ph/9807249

Central Engines of Active Galactic Nuclei: Properites of Collimated Outflows and Applications for Cosmology
Erick J. Guerra (GS), Ruth A. Daly, 1998, ApJ, 493, 536-546.

Outflow Angles, Bulk Lorentz Factors, and Kinematics of Outflows from the Cores of Active Galactic Nuclei
Erick J, Guerra (GS), Ruth A. Daly, 1997, ApJ, 491, 483-500.

The Gaseous Environments of Powerful Extended Radio Sources
Greg F. Wellman (GS), Ruth A. Daly, Lin Wan (GS), 1997, ApJ, 480, 96-114.

Radio Bridge Structure and Its Application to Estimate the Mach Number and Ambient Gas Temperature of Powerful Sources
Greg F. Wellman (GS), Ruth A. Daly, Lin Wan (GS), 1997, ApJ, 480, 79-95.

Classical Double Radio Galaxies and Their Gaseous Environments
Lin Wan (GS), Ruth A. Daly, 1996, ApJ, 467, 145-161.

Equipartition Doppler Factors for a Sample of Active Galactic Nuclei
Alberto Guijosa (GS), Ruth A. Daly, 1996, ApJ, 461, 600-608.

ROSAT HRI Observations of Four High-Redshift Clusters of Galaxies
Jennifer L. Sokoloski (GS), Ruth A. Daly, Simon J. Lilly, 1996, ApJ, 459, 142-146.

Cygnus A and Other Powerful 3CR Sources in Cosmological Tests
Erick J. Guerra, Ruth A. Daly, 1995, arXiv:astro-ph/9506078


Cosmology with Powerful Extended Radio Sources
Powerful Extended Radio Sources as Tools to Estimate Ambient Gas Densities, Jet Luminosities, and Other Key Physical Parameters
Ruth A. Daly, 1995, ApJ, 454, 580-592.

Cosmology with Powerful Extended Radio Sources
Ruth A. Daly, ApJ, 1994, 426, 38-50.

The Connection Between Line Emission and Radio Power in Distant Radio Galaxies
Ruth A. Daly, ApJ, 1993, 406, 47-51.

Morphological Peculiarities of High-Redshift Radio Galaxies – The Role of Relativistic Electrons
Ruth A. Daly, 1992, ApJ, 399, 426-443.

Dark Matter and Brown Dwarfs – Prospects for the Direct Detection of a Brown Dwarf Halo
Ruth A. Daly, Gail C. McLaughlin (US), 1992, ApJ, 390, 423-430.

Inverse Compton Scattering and the Alignments Observed in High-Redshift Radio Galaxies
Ruth A. Daly, 1992, ApJ, 386, L9-L12.

Constraints of Models for the High- and Low-Energy X-Ray Backgrounds
Ruth A. Daly, 1991, ApJ, 379, 37-51.

Spectral Distortions of the Microwave Background Radiation Resulting from the Damping of Pressure Waves
Ruth A. Daly, 1991, ApJ, 371, 14-28.

A Possible Origin of Galactic Magnetic Fields
Ruth A. Daly, Abraham Loeb, 1990, ApJ, 364, 451-455.

A Model to Explain the Correlation Between the Optical and Radio Properties of High-Redshift Galaxies
Ruth A. Daly, 1990, ApJ, 355, 416-426.

Masses of Rich Clusters of Galaxies as a Test of the Biased Cold Dark Matter Theory
P. J. E. Peebles, Ruth A. Daly, Roman Juszkiewics, 1989, ApJ, 347, 563-574.

The Gasdynamics of Compact Relativistic Jets
Ruth A. Daly, Alan P. Marscher, 1988, ApJ, 334, 539-551.

An Interpretation of the Excess Energy Density Observed on the Wien Side of the Microwave Background of Radiation
Ruth A. Daly, 1988, ApJ, 333, L1-L3.

Predictions in the Condensate Model of Evolution of Structures in the Universe
Ruth A. Daly, 1988, MNRAS, 232, 853-864.

Unstable Matter and the 1-0 MeV Gamma-Ray Background
Ruth A. Daly, 1988, ApJ, 324, L47-L50.

The Origin of the Diffuse X-Ray Background and the Formation of Galaxies and Voids
Ruth A. Daly, 1987, ApJ, 322, 20-33.

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