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  1. Matthew Anderson & Richard A. Matzner (2005). Extended Lifetime in Computational Evolution of Isolated Black Holes. Foundations of Physics 35 (9):1477-1495.
    Solving the 4-d Einstein equations as evolution in time requires solving equations of two types: the four elliptic initial data (constraint) equations, followed by the six second-order evolution equations. Analytically the constraint equations remain solved under the action of the evolution, and one approach is to simply monitor them (unconstrained evolution). The problem of the 3-d computational simulation of even a single isolated vacuum black hole has proven to be remarkably difficult. Recently, we have become aware of two publications that (...)
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  2. J. L. F. Barbón & E. Rabinovici (2003). Remarks on Black Hole Instabilities and Closed String Tachyons. Foundations of Physics 33 (1):145-165.
    Physical arguments stemming from the theory of black-hole thermodynamics are used to put constraints on the dynamics of closed-string tachyon condensation in Scherk–Schwarz compactifications. A geometrical interpretation of the tachyon condensation involves an effective capping of a noncontractible cycle, thus removing the very topology that supports the tachyons. A semiclassical regime is identified in which the matching between the tachyon condensation and the black-hole instability flow is possible. We formulate a generalized correspondence principle and illustrate it in several different circumstances: (...)
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  3. Andrei Barvinsky, Saurya Das & Gabor Kunstatter (2002). Discrete Spectra of Charged Black Holes. Foundations of Physics 32 (12):1851-1862.
    Bekenstein proposed that the spectrum of horizon area of quantized black holes must be discrete and uniformly spaced. We examine this proposal in the context of spherically symmetric charged black holes in a general class of gravity theories. By imposing suitable boundary conditions on the reduced phase space of the theory to incorporate the thermodynamic properties of these black holes and then performing a simplifying canonical transformation, we are able to quantize the system exactly. The resulting spectra of horizon area, (...)
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  4. R. Bernabei, P. Belli, F. Cappella, R. Cerulli, C. J. Dai, A. D'Angelo, H. L. He, A. Incicchitti, H. H. Kuang, X. H. Ma, F. Montecchia, F. Nozzoli, D. Prosperi, X. D. Sheng & Z. P. Ye (2010). Results From DAMA/LIBRA at Gran Sasso. Foundations of Physics 40 (7):900-916.
    The DAMA project is an observatory for rare processes and it is operative deep underground at the Gran Sasso National Laboratory of the I.N.F.N. In particular, the DAMA/LIBRA (Large sodium Iodide Bulk for RAre processes) set-up consists of highly radiopure NaI(Tl) detectors for a total sensitive exposed mass of ≃250 kg. Recent results, obtained by this set-up by exploiting the model independent annual modulation signature of Dark Matter (DM) particles, have confirmed and improved those obtained by the former DAMA/NaI experiment. (...)
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  5. H. -H. V. Borzeszkowski (2000). Black Hole Physics. Basic Concepts and New Developments. Foundations of Physics 30 (8):1317-1320.
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  6. H. G. Callaway (2014). Arthur S. Eddington, The Nature of the Physical World, An Annotated Edition. Cambridge Scholars Publishing.
    Arthur S. Eddington, FRS, (1882–1944) was one of the most prominent British scientists of his time. He made major contributions to astrophysics and to the broader understanding of the revolutionary theories of relativity and quantum mechanics. He is famed for his astronomical observations of 1919, confirming Einstein’s prediction of the curving of the paths of starlight, and he was the first major interpreter of Einstein’s physics to the English-speaking world. His 1928 book, The Nature of the Physical World, here re-issued (...)
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  7. Carl E. Carlson & Ian J. Swanson (2000). Casimir Energy in Astrophysics: Gamma-Ray Bursts From QED Vacuum Transitions. [REVIEW] Foundations of Physics 30 (5):775-783.
    Motivated by analogous applications to sonoluminescence, neutron stars mergers are examined in the context of Schwinger's dynamical Casimir effect. When the dielectric properties of the QED vacuum are altered through the introduction of dense matter, energy shifts in the zero-point fluctuations can appear as photon bursts at gamma-ray frequencies. The amount of radiation depends upon the properties and amount of matter in motion and the suddenness of the transition. It is shown that the dynamical Casimir effect can convert sufficient energy (...)
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  8. Milan M. Ćirković (2006). Too Early? On the Apparent Conflict of Astrobiology and Cosmology. Biology and Philosophy 21 (3):369-379.
    An interesting consequence of the modern cosmological paradigm is the spatial infinity of the universe. When coupled with naturalistic understanding of the origin of life and intelligence, which follows the basic tenets of astrobiology, and with some fairly incontroversial assumptions in the theory of observation selection effects, this infinity leads, as Ken Olum has recently shown, to a paradoxical conclusion. Olum's paradox is related, to the famous Fermi's paradox in astrobiology and “SETI” studies. We, hereby, present an evolutionary argument countering (...)
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  9. G. L. Comer (2002). Do Neutron Star Gravitational Waves Carry Superfluid Imprints? Foundations of Physics 32 (12):1903-1942.
    Isolated neutron stars undergoing non-radial oscillations are expected to emit gravitational waves in the kilohertz frequency range. To date, radio astronomers have located about 1,300 pulsars, and can estimate that there are about 2×108 neutron stars in the galaxy. Many of these are surely old and cold enough that their interiors will contain matter in the superfluid or superconducting state. In fact, the so-called glitch phenomenon in pulsars (a sudden spin-up of the pulsar's crust) is best described by assuming the (...)
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  10. G. Contopoulos (2001). The Development of Nonlinear Dynamics in Astronomy. Foundations of Physics 31 (1):89-114.
    We present the historical development of Nonlinear Dynamical Astronomy with emphasis on the “third integral” and its applications. The new era started with the use of computers, and of formal analytical developments in the spirit of Poincaré. Most dynamical systems were found to contain both ordered and chaotic orbits. The transition from order to chaos is discussed. Recent developments refer to the dynamical spectra, integrals of notion in self-consistent models, systems of 3 or more degrees of freedom, chaos in relativity (...)
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  11. John Cramer, SN1987A - Supernova Astrophysics Grows Up.
    unlikely name of Sanduleak -69 o202 had exploded, becoming type II supernova SN1987A. The discovery was broadcast to a data-hungry world, and the astronomy/astrophysics community has been in an uproar ever since. Sanduleak -69 o202 before exploding had a mass 15-20 times greater than that of our sun and was located in the Large Magellanic Cloud, a sort of suburb of our galaxy some 160,000 light years distant. To the despair of residents of North America, SN1987A is visible only in (...)
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  12. Rosa Doran, Francisco S. N. Lobo & Paulo Crawford (2008). Interior of a Schwarzschild Black Hole Revisited. Foundations of Physics 38 (2):160-187.
    The Schwarzschild solution has played a fundamental conceptual role in general relativity, and beyond, for instance, regarding event horizons, spacetime singularities and aspects of quantum field theory in curved spacetimes. However, one still encounters the existence of misconceptions and a certain ambiguity inherent in the Schwarzschild solution in the literature. By taking into account the point of view of an observer in the interior of the event horizon, one verifies that new conceptual difficulties arise. In this work, besides providing a (...)
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  13. Rosa Doran, Francisco S. N. Lobo & Paulo Crawford (2008). Interior of a Schwarzschild Black Hole Revisited. Foundations of Physics 38 (2):160-187.
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  14. Bernard R. Goldstein (1992). Book Review:The General History of Astronomy. Vol. 2: Planetary Astronomy From the Renaissance to the Rise of Astrophysics. Part A: Tycho Brahe to Newton Rene Taton, Curtis Wilson. [REVIEW] Philosophy of Science 59 (4):698-.
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  15. Eric P. M. Grist (1999). Hidden Implications of Clumps and Masses. Acta Biotheoretica 47 (1).
    In a recent study on the spawn of the common frog (Rana temporaria) surveyed over several breeding sites, a significant linear relationship (p < 0.001) was found to exist between the number of spawn ''clumps'' making up a bouyant spawn ''mass'' and the area of the mass visible from above the water surface (Griffiths and Raper, 1994). An open question exists, as to why such (...)
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  16. J. L. Heilbron (ed.) (2005). The Oxford Guide to the History of Physics and Astronomy. Oxford University Press.
    With over 150 alphabetically arranged entries about key scientists, concepts, discoveries, technological innovations, and learned institutions, the Oxford Guide to Physics and Astronomy traces the history of physics and astronomy from the Renaissance to the present. For students, teachers, historians, scientists, and readers of popular science books such as Galileo's Daughter, this guide deciphers the methods and philosophies of physics and astronomy as well as the historical periods from which they emerged. Meant to serve the lay reader and the professional (...)
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  17. Robert Hudson (2009). The Methodological Strategy of Robustness in the Context of Experimental WIMP Research. Foundations of Physics 39 (2):174-193.
    According to the methodological principle called ‘robustness’, empirical evidence is more reliable when it is generated using multiple, independent (experimental) routes that converge on the same result. As it happens, robustness as a methodological strategy is quite popular amongst philosophers. However, despite its popularity, my goal here is to criticize the value of this principle on historical grounds. My historical reasons take into consideration some recent history of astroparticle physics concerning the search for WIMPs (weakly interacting massive particles), one of (...)
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  18. Ted Jacobson & Aron C. Wall (2010). Black Hole Thermodynamics and Lorentz Symmetry. Foundations of Physics 40 (8):1076-1080.
    Recent developments point to a breakdown in the generalized second law of thermodynamics for theories with Lorentz symmetry violation. It appears possible to construct a perpetual motion machine of the second kind in such theories, using a black hole to catalyze the conversion of heat to work. Here we describe and extend the arguments leading to that conclusion. We suggest the inference that local Lorentz symmetry may be an emergent property of the macroscopic world with origins in a microscopic second (...)
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  19. Martin Johnson (1947). Time, Knowledge, and the Nebulae. New York, Dover Publications.
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  20. Martin Christopher Johnson (1945). Time, Knowledge and the Nebulae. London, Faber and Faber Limited.
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  21. Herbert Konitz (1975). A Geometric Aspect of Hubble's Phenomenon. Foundations of Physics 5 (1):185-191.
    The conventional interpretation of the Hubble effect as a Doppler effect, based upon the concept of an expanding universe or based upon the idea of a continuously increasing radius of curvature of space, leads to some difficulties. It seems possible to avoid these difficulties by ascribing the redshift of light coming from remote galaxies to the fact that the non-Euclidean structure of the universe gets more and more important as observation extends to regions extremely distant from the point of observation. (...)
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  22. B. P. Kosyakov (2008). Black Holes: Interfacing the Classical and the Quantum. [REVIEW] Foundations of Physics 38 (7):678-694.
    The central idea of this paper is that forming the black hole horizon is attended with the transition from the classical regime of evolution to the quantum one. We offer and justify the following criterion for discriminating between the classical and the quantum: creations and annihilations of particle-antiparticle pairs are impossible in the classical reality but possible in the quantum reality. In flat spacetime, we can switch from the classical picture of field propagation to the quantum picture by changing the (...)
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  23. Wolfgang Kundt (1993). The Most Energetic Processes in the Universe. Foundations of Physics 23 (6):931-948.
    Some key problems of present-day astrophysics are critically revisited. Particular consideration is given to (1) supernova explosions, their mechanism, their progenitors, and their stellar remnants; (2) a radiation-transfer interpretation of supernova light curves; (3) the dearth of supernova-neutron star associations; (4) the central engines and jet-formation mechanisms of the four classes of bipolar-flow sources, in particular of the active galactic nuclei and the young stellar objects; (5) a critical discussion of the different ways in which cosmic rays are thought to (...)
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  24. A. Kyrala (1974). Selection Rules, Causality, and Unitarity in Statistical and Quantum Physics. Foundations of Physics 4 (1):31-51.
    The integrodifferential equations satisfied by the statistical frequency functions for physical systems undergoing stochastic transitions are derived by application of a causality principle and selection rules to the Markov chain equations. The result equations can be viewed as generalizations of the diffusion equation, but, unlike the latter, they have a direct bearing onactive transport problems in biophysics andcondensation aggregation problems of astrophysics and phase transition theory. Simple specific examples of the effects of severe selection rules, such as the relaxational Boltzmann (...)
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  25. James Lindesay (2007). Coordinates with Non-Singular Curvature for a Time Dependent Black Hole Horizon. Foundations of Physics 37 (8):1181-1196.
    A naive introduction of a dependency of the mass of a black hole on the Schwarzschild time coordinate results in singular behavior of curvature invariants at the horizon, violating expectations from complementarity. If instead a temporal dependence is introduced in terms of a coordinate akin to the river time representation, the Ricci scalar is nowhere singular away from the origin. It is found that for a shrinking mass scale due to evaporation, the null radial geodesics that generate the horizon are (...)
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  26. Alexander P. D. Mourelatos (2008). The Cloud-Astrophysics of Xenophanes and Ionian Material Monism. In Patricia Curd & Daniel W. Graham (eds.), The Oxford Handbook of Presocratic Philosophy. Oxford University Press.
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  27. V. F. Mukhanov (2003). On the Origin of Black-Hole Entropy. Foundations of Physics 33 (2):271-277.
    A simple statistical interpretation of the origin of black hole entropy is presented. It is shown that this entropy can be understood as emerging as a result of missing information about the exact state of the matter from which the black hole was formed.
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  28. E. N. Parker (1995). Plasma Physics: An Introduction to the Theory of Astrophysical, Geophysical, and Laboratory Plasma. Foundations of Physics 25:517-517.
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  29. M. Pauri & M. Vallisneri (1999). Classical Roots of the Unruh and Hawking Effects. Foundations of Physics 29 (10):1499-1520.
    Although the Unruh and Hawking phenomena are commonly linked to field quantization in “accelerated” coordinates or in curved space-times, we argue that they are deeply rooted at the classical level. We maintain, in particular, that these effects should be best understood by considering how the special-relativistic notion of “particle” gets blurred when employed in theories including accelerated observers or in general-relativistic theories and that this blurring is an instantiation of a more general behavior arising when the principle of equivalence is (...)
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  30. S. J. Prokhovnik & W. T. Morris (1989). The Physical Basis of Astronomical Aberration. Foundations of Physics 19 (5):531-539.
    The mechanism of stellar aberration was explained and formulated by Bradley in terms of the existence of a unique reference frame for light propagation. However, Einstein's denial of the existence of such a frame appears to undermine Bradley's interpretation of the phenomenon. It is suggested that the recent evidence for a cosmologically-based inertial reference frame provides a new physical basis for Bradley's explanation in a manner consistent with the requirements of special relativity. It is shown that a “delay” effect is (...)
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  31. Carlo Rovelli (2011). Che Cos'è la Scienza: La Rivoluzione di Anassimandro. Mondadori Università.
    All human civilizations have thought that the world was made of sky above and the Earth below. All except one. For the Greeks, the Earth was a rock floating in space, and under the earth there was no ground, no turtles, nor the gigantic columns of which the Bible speaks. How did the Greeks understand that the Earth is suspended in nothingness? Who understood this and how? It is this unique "scientific revolution" of Anaximander of which the author speaks, which (...)
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  32. Stéphanie Ruphy, Learning From a Simulated Universe: The Limits of Realistic Modeling in Astrophysics and Cosmology.
    As noticed recently by Winsberg (2003), how computer models and simulations get their epistemic credentials remains in need of epistemological scrutiny. My aim in this paper is to contribute to fill this gap by discussing underappreciated features of simulations (such as “path-dependency” and plasticity) which, I’ll argue, affect their validation. The focus will be on composite modeling of complex real-world systems in astrophysics and cosmology. The analysis leads to a reassessment of the epistemic goals actually achieved by this kind of (...)
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  33. Mendel Sachs (1982). A Pulsar Model From an Oscillating Black Hole. Foundations of Physics 12 (7):689-708.
    The first part of this paper examines conditions in accord with Einstein's criterion of regularity on the field solutions everywhere that would correspond to the existence of a black hole star, following from solutions of his (nonvacuum) field equations. ‘Black hole’ is defined here as a star whose matter is so condensed as to correspond to a complete family of spatially closed geodesics. The condition imposed is that the angular momentum of a test body in each of the closed geodesics (...)
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  34. Simon Schaffer (2007). Astrophysics, Anthropology, and Other Imperial Pursuits. In Jeanette Edwards, Penelope Harvey & Peter Wade (eds.), Anthropology and Science: Epistemologies in Practice. Berg. 43.
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  35. T. J. J. See (1912). The Capture Theory of Cosmical Evolution Confirmed by the Latest Researches on the Origin of Star Clusters. The Monist 22 (4):618-632.
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  36. Mikaela Sundberg (2010). Cultures of Simulations Vs. Cultures of Calculations? The Development of Simulation Practices in Meteorology and Astrophysics. Studies in History and Philosophy of Science Part B 41 (3):273-281.
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  37. Mark Walker & Milan Cirkovic, Anthropic Reasoning and the Contemporary Design Argument in Astrophysics: A Reply to Robert Klee.
    In a recent study of astrophysical “fine-tunings” (or “coincidences”), Robert Klee critically assesses the support that such astrophysical evidence might be thought to lend to the design argument (i.e., the argument that our universe has been designed by some deity). Klee argues that a proper assessment indicates that the universe is not as “fine-tuned” as advertised by proponents of the design arguments. We argue (i) that Klee’s assessment of the data is, to a certain extent, problematic; and (ii) even if (...)
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