http://prl.aps.org/ Recently published articles in Phys. Rev. Lett. in the Table of Content section "Gravitation and Astrophysics" en-us Copyright (c) 2008 The American Physical Society 2008-05-07T08:09:08-04:00 assocpub@aps.org rss@aps.org hourly 4 2008-05-07T08:09:08-04:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevLett.100.171302 Author(s): Evgeny I. Buchbinder, Justin Khoury, and Burt A. Ovrut<br/>The new ekpyrotic model is an alternative scenario of the early Universe which relies on a phase of slow contraction before the big bang. We calculate the 3-point and 4-point correlation functions of primordial density perturbations and find a generically large non-Gaussian signal, just below the cu...<br/>[Phys. Rev. Lett. 100, 171302] Published Fri May 02, 2008 Evgeny I. Buchbinder, Justin Khoury, and Burt A. Ovrut 2008-05-02T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.171302 Phys. Rev. Lett. 100, 171302 text/html article Physical Review Letters 100 17 2008-05-02T00:00:00-04:00 171302 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.171101 Author(s): Eva Hackmann and Claus Lämmerzahl<br/>The complete set of analytic solutions of the geodesic equation in a Schwarzschild–(anti-)de Sitter space-time is presented. The solutions are derived from the Jacobi inversion problem restricted to the theta divisor. In its final form the solutions can be expressed in terms of derivatives of Kl...<br/>[Phys. Rev. Lett. 100, 171101] Published Fri May 02, 2008 Eva Hackmann and Claus Lämmerzahl 2008-05-02T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.171101 Phys. Rev. Lett. 100, 171101 text/html article Physical Review Letters 100 17 2008-05-02T00:00:00-04:00 171101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.171301 Author(s): Lawrence M. Krauss and James Dent<br/>We describe here how the late time behavior of the quantum mechanical decay of unstable states, which is predicted to deviate from an exponential form, may have important cosmological implications. It may increase the likelihood of eternal inflation and may enhance the likelihood of observing a smal...<br/>[Phys. Rev. Lett. 100, 171301] Published Wed Apr 30, 2008 Lawrence M. Krauss and James Dent 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.171301 Phys. Rev. Lett. 100, 171301 text/html article Physical Review Letters 100 17 2008-04-30T00:00:00-04:00 171301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.161302 Author(s): Alejandro Corichi and Parampreet Singh<br/>Loop quantum cosmology predicts that, in simple models, the big bang is replaced by a quantum bounce. A natural question is whether the universe retains, after the bounce, its memory about the previous epoch. More precisely, does the Universe retain various properties of the state after evolving uni...<br/>[Phys. Rev. Lett. 100, 161302] Published Wed Apr 23, 2008 Alejandro Corichi and Parampreet Singh 2008-04-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.161302 Phys. Rev. Lett. 100, 161302 text/html article Physical Review Letters 100 16 2008-04-23T00:00:00-04:00 161302 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.161101 Author(s): M. Holst, G. Nagy, and G. Tsogtgerel<br/>We establish new existence results for the Einstein constraint equations for mean extrinsic curvature arbitrarily far from constant. The results hold for rescaled background metric in the positive Yamabe class, with freely specifiable parts of the data sufficiently small, and with matter energy dens...<br/>[Phys. Rev. Lett. 100, 161101] Published Wed Apr 23, 2008 M. Holst, G. Nagy, and G. Tsogtgerel 2008-04-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.161101 Phys. Rev. Lett. 100, 161101 text/html article Physical Review Letters 100 16 2008-04-23T00:00:00-04:00 161101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.161301 Author(s): Abraham Loeb and J. Stuart Wyithe<br/>Measurements of the 21 cm line emission by residual cosmic hydrogen after reionization can be used to trace the power spectrum of density perturbations through a significant fraction of the observable volume of the Universe. We show that a dedicated 21 cm observatory could probe a number of indepe...<br/>[Phys. Rev. Lett. 100, 161301] Published Tue Apr 22, 2008 Abraham Loeb and J. Stuart Wyithe 2008-04-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.161301 Phys. Rev. Lett. 100, 161301 text/html article Physical Review Letters 100 16 2008-04-22T00:00:00-04:00 161301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.151102 Author(s): Jes Madsen<br/>Electron-positron pair creation in supercritical electric fields limits the net charge of any static, spherical object, such as superheavy nuclei, strangelets, and Q balls, or compact stars like neutron stars, quark stars, and black holes. For radii between 4×10^{2} and 10^{4}   fm the upper bo...<br/>[Phys. Rev. Lett. 100, 151102] Published Thu Apr 17, 2008 Jes Madsen 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.151102 Phys. Rev. Lett. 100, 151102 text/html article Physical Review Letters 100 15 2008-04-17T00:00:00-04:00 151102 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.151101 Author(s): Latham Boyle, Michael Kesden, and Samaya Nissanke<br/>We regard binary–black-hole (BBH) merger as a map from a simple initial state (two Kerr black holes, with dimensionless spins a and b) to a simple final state (a Kerr black hole with mass m, dimensionless spin s, and kick velocity k). By expanding this map around a=b=0 and applying symmetry constr...<br/>[Phys. Rev. Lett. 100, 151101] Published Thu Apr 17, 2008 Latham Boyle, Michael Kesden, and Samaya Nissanke 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.151101 Phys. Rev. Lett. 100, 151101 text/html article Physical Review Letters 100 15 2008-04-17T00:00:00-04:00 151101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.141301 Author(s): Michele Maggiore<br/>When a classical black hole is perturbed, its relaxation is governed by a set of quasinormal modes with complex frequencies ω=ω_{R} +iω_{I} . We show that this behavior is the same as that of damped harmonic oscillators whose real frequencies are (ω_{R}^{2} +ω_{I}^{2} )^{1/2} , rather than simp...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 100, 141301] Published Tue Apr 08, 2008 Michele Maggiore 2008-04-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.141301 Phys. Rev. Lett. 100, 141301 text/html article Physical Review Letters 100 14 2008-04-08T00:00:00-04:00 141301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.131302 Author(s): Katherine Jones-Smith, Lawrence M. Krauss, and Harsh Mathur<br/>Using a large N sigma model approximation we explicitly calculate the power spectrum of gravitational waves arising from a global phase transition in the early Universe and we confirm that it is scale invariant, implying an observation of such a spectrum may not be a unique feature of inflation. Mor...<br/>[Phys. Rev. Lett. 100, 131302] Published Wed Apr 02, 2008 Katherine Jones-Smith, Lawrence M. Krauss, and Harsh Mathur 2008-04-02T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.131302 Phys. Rev. Lett. 100, 131302 text/html article Physical Review Letters 100 13 2008-04-02T00:00:00-04:00 131302 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.131301 Author(s): Daniel F. Litim and Tilman Plehn<br/>We study quantum-gravitational signatures at the CERN Large Hadron Collider (LHC) in the context of theories with extra spatial dimensions and a low fundamental Planck scale in the TeV range. Implications of a gravitational fixed point at high energies are worked out using Wilson’s renormalization...<br/>[Phys. Rev. Lett. 100, 131301] Published Tue Apr 01, 2008 Daniel F. Litim and Tilman Plehn 2008-04-01T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.131301 Phys. Rev. Lett. 100, 131301 text/html article Physical Review Letters 100 13 2008-04-01T00:00:00-04:00 131301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.131101 Author(s): Amir Levinson and Omer Bromberg<br/>A system of equations governing the structure of a steady, relativistic radiation-dominated shock is derived, starting from the general form of the transfer equation obeyed by the photon distribution function. Closure is obtained by truncating the system of moment equations at some order. The anisot...<br/>[Phys. Rev. Lett. 100, 131101] Published Mon Mar 31, 2008 Amir Levinson and Omer Bromberg 2008-03-31T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.131101 Phys. Rev. Lett. 100, 131101 text/html article Physical Review Letters 100 13 2008-03-31T00:00:00-04:00 131101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.121101 Author(s): Shahar Hod<br/>Spacetime singularities that arise in gravitational collapse are always hidden inside of black holes. This is the essence of the weak cosmic censorship conjecture. The hypothesis, put forward by Penrose 40 years ago, is still one of the most important open questions in general relativity. In this Le...<br/>[Phys. Rev. Lett. 100, 121101] Published Wed Mar 26, 2008 Shahar Hod 2008-03-26T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.121101 Phys. Rev. Lett. 100, 121101 text/html article Physical Review Letters 100 12 2008-03-26T00:00:00-04:00 121101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.121301 Author(s): Shuang-Qing Wu<br/>I present the general exact solutions for nonextremal rotating charged black holes in the Gödel universe of five-dimensional minimal supergravity theory. They are uniquely characterized by four nontrivial parameters: namely, the mass m, the charge q, the Kerr equal rotation parameter a, and the Gö...<br/>[Phys. Rev. Lett. 100, 121301] Published Mon Mar 24, 2008 Shuang-Qing Wu 2008-03-24T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.121301 Phys. Rev. Lett. 100, 121301 text/html article Physical Review Letters 100 12 2008-03-24T00:00:00-04:00 121301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.111102 Author(s): V. Alan Kostelecký, Neil Russell, and Jay D. Tasson<br/>Exceptional sensitivity to spacetime torsion can be achieved by searching for its couplings to fermions. Recent experimental searches for Lorentz violation are exploited to extract new constraints involving 19 of the 24 independent torsion components down to levels of order 10^{-31}   GeV.<br/>[Phys. Rev. Lett. 100, 111102] Published Thu Mar 20, 2008 V. Alan Kostelecký, Neil Russell, and Jay D. Tasson 2008-03-20T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.111102 Phys. Rev. Lett. 100, 111102 text/html article Physical Review Letters 100 11 2008-03-20T00:00:00-04:00 111102 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.111101 Author(s): Georg Robbers, Niayesh Afshordi, and Michael Doran<br/>Einstein’s theory of general relativity contains a universal value of the Planck mass. However, one may envisage that in alternative theories of gravity the effective value of the Planck mass (or Newton’s constant), which quantifies the coupling of matter to metric perturbations, can run on the ...<br/>[Phys. Rev. Lett. 100, 111101] Published Tue Mar 18, 2008 Georg Robbers, Niayesh Afshordi, and Michael Doran 2008-03-18T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.111101 Phys. Rev. Lett. 100, 111101 text/html article Physical Review Letters 100 11 2008-03-18T00:00:00-04:00 111101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.101102 Author(s): Sebastian J. Szybka and Tadeusz Chmaj<br/>We present the numerical evidence for fractal threshold behavior in the five dimensional vacuum Einstein equations satisfying the cohomogeneity-two triaxial Bianchi type-IX ansatz. In other words, we show that a flip of the wings of a butterfly may influence the process of the black hole formation.<br/>[Phys. Rev. Lett. 100, 101102] Published Wed Mar 12, 2008 Sebastian J. Szybka and Tadeusz Chmaj 2008-03-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.101102 Phys. Rev. Lett. 100, 101102 text/html article Physical Review Letters 100 10 2008-03-12T00:00:00-04:00 101102 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.101101 Author(s): R. U. Abbasi et al. High Resolution Fly’s Eye Collaboration<br/>The High Resolution Fly’s Eye (HiRes) experiment has observed the Greisen-Zatsepin-Kuzmin suppression (called the GZK cutoff) with a statistical significance of five standard deviations. HiRes’ measurement of the flux of ultrahigh energy cosmic rays shows a sharp suppression at an energy of 6×1...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 100, 101101] Published Mon Mar 10, 2008 R. U. Abbasi et al. High Resolution Fly’s Eye Collaboration 2008-03-10T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.101101 Phys. Rev. Lett. 100, 101101 text/html article Physical Review Letters 100 10 2008-03-10T00:00:00-04:00 101101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.091304 Author(s): J. Ambjørn, A. Görlich, J. Jurkiewicz, and R. Loll<br/>We show that the quantum universe emerging from a nonperturbative, Lorentzian sum over geometries can be described with a high accuracy by a four-dimensional de Sitter spacetime. By a scaling analysis involving Newton’s constant, we establish that the linear size of the quantum universes under st...<br/>[Phys. Rev. Lett. 100, 091304] Published Fri Mar 07, 2008 J. Ambjørn, A. Görlich, J. Jurkiewicz, and R. Loll 2008-03-07T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.091304 Phys. Rev. Lett. 100, 091304 text/html article Physical Review Letters 100 9 2008-03-07T00:00:00-05:00 091304 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.091303 Author(s): Tzu-Ching Chang, Ue-Li Pen, Jeffrey B. Peterson, and Patrick McDonald<br/>The expansion of the Universe appears to be accelerating, and the mysterious antigravity agent of this acceleration has been called “dark energy.” To measure the dynamics of dark energy, baryon acoustic oscillations (BAO) can be used. Previous discussions of the BAO dark energy test have focused...<br/>[Phys. Rev. Lett. 100, 091303] Published Wed Mar 05, 2008 Tzu-Ching Chang, Ue-Li Pen, Jeffrey B. Peterson, and Patrick McDonald 2008-03-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.091303 Phys. Rev. Lett. 100, 091303 text/html article Physical Review Letters 100 9 2008-03-05T00:00:00-05:00 091303 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.091302 Author(s): Rishi Khatri and Benjamin D. Wandelt<br/>We calculate the contribution of cosmic strings arising from a phase transition in the early Universe, or cosmic superstrings arising from brane inflation, to the cosmic 21 cm power spectrum at redshifts z≥30. Future experiments can exploit this effect to constrain the cosmic string tension Gμ a...<br/>[Phys. Rev. Lett. 100, 091302] Published Tue Mar 04, 2008 Rishi Khatri and Benjamin D. Wandelt 2008-03-04T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.091302 Phys. Rev. Lett. 100, 091302 text/html article Physical Review Letters 100 9 2008-03-04T00:00:00-05:00 091302 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.091301 Author(s): Ralf Schützhold, Gernot Schaller, and Dietrich Habs<br/>Electrons moving in a strong periodic electromagnetic field (e.g., laser or undulator) may convert quantum vacuum fluctuations into pairs of entangled photons, which can be understood in terms of the Unruh effect. Apart from verifying this striking phenomenon, the considered effect may allow the con...<br/>[Phys. Rev. Lett. 100, 091301] Published Mon Mar 03, 2008 Ralf Schützhold, Gernot Schaller, and Dietrich Habs 2008-03-03T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.091301 Phys. Rev. Lett. 100, 091301 text/html article Physical Review Letters 100 9 2008-03-03T00:00:00-05:00 091301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.091102 Author(s): John D. Anderson, James K. Campbell, John E. Ekelund, Jordan Ellis, and James F. Jordan<br/>We report and characterize anomalous orbital-energy changes observed during six Earth flybys by the Galileo, NEAR, Cassini, Rosetta, and MESSENGER spacecraft. These anomalous energy changes are consistent with an empirical prediction formula which is proportional to the total orbital energy per unit...<br/>[Phys. Rev. Lett. 100, 091102] Published Mon Mar 03, 2008 John D. Anderson, James K. Campbell, John E. Ekelund, Jordan Ellis, and James F. Jordan 2008-03-03T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.091102 Phys. Rev. Lett. 100, 091102 text/html article Physical Review Letters 100 9 2008-03-03T00:00:00-05:00 091102 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.091101 Author(s): Dimitrios Psaltis, Delphine Perrodin, Keith R. Dienes, and Irina Mocioiu<br/>Considerable attention has recently focused on gravity theories obtained by extending general relativity with additional scalar, vector, or tensor degrees of freedom. In this Letter, we show that the black-hole solutions of these theories are essentially indistinguishable from those of general relat...<br/>[Phys. Rev. Lett. 100, 091101] Published Mon Mar 03, 2008 Dimitrios Psaltis, Delphine Perrodin, Keith R. Dienes, and Irina Mocioiu 2008-03-03T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.091101 Phys. Rev. Lett. 100, 091101 text/html article Physical Review Letters 100 9 2008-03-03T00:00:00-05:00 091101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.081301 Author(s): A. A. Schekochihin, S. C. Cowley, R. M. Kulsrud, M. S. Rosin, and T. Heinemann<br/>In turbulent high-beta astrophysical plasmas (exemplified by the galaxy cluster plasmas), pressure-anisotropy-driven firehose and mirror fluctuations grow nonlinearly to large amplitudes, δB/B∼1, on a time scale comparable to the turnover time of the turbulent motions. The principle of their nonl...<br/>[Phys. Rev. Lett. 100, 081301] Published Fri Feb 29, 2008 A. A. Schekochihin, S. C. Cowley, R. M. Kulsrud, M. S. Rosin, and T. Heinemann 2008-02-29T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.081301 Phys. Rev. Lett. 100, 081301 text/html article Physical Review Letters 100 8 2008-02-29T00:00:00-05:00 081301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.081102 Author(s): Kirill Krasnov<br/>We show that the constraint algebra of Ashtekar’s Hamiltonian formulation of general relativity can be nontrivially deformed by allowing the cosmological constant to become an arbitrary function of the (Weyl) curvature. Our result implies that there is not one but infinitely many (parametrized by ...<br/>[Phys. Rev. Lett. 100, 081102] Published Wed Feb 27, 2008 Kirill Krasnov 2008-02-27T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.081102 Phys. Rev. Lett. 100, 081102 text/html article Physical Review Letters 100 8 2008-02-27T00:00:00-05:00 081102 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.081101 Author(s): K. Glampedakis, N. Andersson, and D. I. Jones<br/>We discuss a new superfluid instability occurring in the interior of mature neutron stars with implications for free precession. This instability is similar to the instability which is responsible for the formation of turbulence in superfluid helium. We demonstrate that the instability is unlikely t...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 100, 081101] Published Tue Feb 26, 2008 K. Glampedakis, N. Andersson, and D. I. Jones 2008-02-26T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.081101 Phys. Rev. Lett. 100, 081101 text/html article Physical Review Letters 100 8 2008-02-26T00:00:00-05:00 081101 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.071301 Author(s): Shin’ichiro Ando and Marc Kamionkowski<br/>There has been growing interest in the possibility of testing more precisely the assumption of statistical isotropy of primordial density perturbations. If it is to be tested with galaxy surveys at distance scales ≲10  Mpc, then nonlinear evolution of anisotropic power must be understood. To t...<br/>[Phys. Rev. Lett. 100, 071301] Published Thu Feb 21, 2008 Shin’ichiro Ando and Marc Kamionkowski 2008-02-21T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.071301 Phys. Rev. Lett. 100, 071301 text/html article Physical Review Letters 100 7 2008-02-21T00:00:00-05:00 071301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.061301 Author(s): Alejandro Ibarra and David Tran<br/>Gravitinos are very promising candidates for the cold dark matter of the Universe. Interestingly, to achieve a sufficiently long gravitino lifetime, R parity conservation is not required, thus preventing any dangerous cosmological influence of the next-to-lightest supersymmetric particle. When R par...<br/>[Phys. Rev. Lett. 100, 061301] Published Wed Feb 13, 2008 Alejandro Ibarra and David Tran 2008-02-13T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.061301 Phys. Rev. Lett. 100, 061301 text/html article Physical Review Letters 100 6 2008-02-13T00:00:00-05:00 061301 Gravitation and Astrophysics Gravitation and Astrophysics http://link.aps.org/doi/10.1103/PhysRevLett.100.051101 Author(s): Douglas Spolyar, Katherine Freese, and Paolo Gondolo<br/>A mechanism is identified whereby dark matter (DM) in protostellar halos dramatically alters the current theoretical framework for the formation of the first stars. Heat from neutralino DM annihilation is shown to overwhelm any cooling mechanism, consequently impeding the star formation process and ...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 100, 051101] Published Mon Feb 04, 2008 Douglas Spolyar, Katherine Freese, and Paolo Gondolo 2008-02-04T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.100.051101 Phys. Rev. Lett. 100, 051101 text/html article Physical Review Letters 100 5 2008-02-04T00:00:00-05:00 051101 Gravitation and Astrophysics Gravitation and Astrophysics