Supersymmetric flat direction decay: The prospect of particle production and preheating investigated in the unitary gauge
Anders Basboll
We look at the possibility of nonperturbative particle production after inflation from supersymmetry flat directions produced by rotating eigenstates thereby avoiding the standard adiabaticity conditions. This might lead to preheating and prevent the delay of thermalization of the Universe. We inves ... [Phys. Rev. D 78, 023528 (2008)] published Wed Jul 23, 2008.
Neutrino oscillation signatures of oxygen-neon-magnesium supernovae
C. Lunardini, B. Muller, and H.-Th. Janka
We discuss the flavor conversion of neutrinos from core-collapse supernovae that have oxygen-neon-magnesium (ONeMg) cores. Using the numerically calculated evolution of the star up to 650 ms post bounce, we find that, for the normal mass hierarchy, the electron neutrino flux in a detector shows sign ... [Phys. Rev. D 78, 023016 (2008)] published Wed Jul 23, 2008.
New position-sensitive hard x-ray spectrometer
Lo I Yin, Jacob I. Trombka, and Stephen M. Seltzer
A new prototype Lixiscope (Low intensity x-ray imaging scope) is described. In addition to good spatial and temporal resolution in the 20 keV to 200 keV region, it is capable of single-photon counting, imaging, as well as good energy resolution. The new device is well-suited for future low-flux appl ... [Rev. Sci. Instrum. 51, 844 (2008)] published Tue Jul 22, 2008.
Compact resonance absorption spectrometer to monitor the profile of the solar He 58.4 nanometer line
J. F. Crifo, P. Seidl, J. P. Delaboudiniere, and G. Schmidtke
A miniature resonance absorption spectrometer is able to perform a routine monitoring in space of the line profile and intensity of the He i resonance line from the solar disk with a time resolution of about 1 min and a spectral resolution of 10. It consists of a predispersive spectrometer incorpora ... [Rev. Sci. Instrum. 51, 321 (2008)] published Tue Jul 22, 2008.
Statistical properties of the linear tidal shear
Vincent Desjacques and Robert E. Smith
Large-scale structures originate from coherent motions induced by inhomogeneities in the primeval gravitational potential. Here, we investigate the two-point statistics of the second derivative of the potential, the tidal shear, under the assumption of Gaussianity. We derive an exact closed form exp ... [Phys. Rev. D 78, 023527 (2008)] published Tue Jul 22, 2008.
Test of the Chevallier-Polarski-Linder parametrization for rapid dark energy equation of state transitions
Sebastian Linden and Jean-Marc Virey
We test the robustness and flexibility of the Chevallier-Polarski-Linder (CPL) parametrization of the dark energy equation of state w(z)=w+w(z/(1 + z)) in recovering a four-parameter steplike fiducial model. We constrain the parameter space region of the underlying fiducial model where the CPL param ... [Phys. Rev. D 78, 023526 (2008)] published Tue Jul 22, 2008.
Quintessence cosmologies with a growing matter component
Luca Amendola, Marco Baldi, and Christof Wetterich
We investigate coupled quintessence cosmologies with a matter consisting of particles with an increasing mass. While negligible in early cosmology, the appearance of a growing matter component has stopped the evolution of the cosmon field at a redshift around six. In turn, this has triggered the acc ... [Phys. Rev. D 78, 023015 (2008)] published Tue Jul 22, 2008.
Symmetries and metrics of homogeneous cosmologies
M. A. Melvin and T. R. Michalik
It is shown that an assumption of ''historical homogeneity''or the persistence of spatial homogeneity in timeleads to the synchronous (time-orthogonal) form ds=dt+gamma (t)epsilon[direct-product]epsilon, of the metrics for general spatially homogeneous (Bianchi) cosmologies. The epsilon are group-re ... [J. Math. Phys. 21, 1938 (2008)] published Mon Jul 21, 2008.
Analytic model for the bispectrum of galaxies in redshift space
Robert E. Smith, Ravi K. Sheth, and Roman Scoccimarro
We develop an analytic theory for the redshift space bispectrum of dark matter, haloes, and galaxies. This is done within the context of the halo model of structure formation, as this allows for the self-consistent inclusion of linear and nonlinear redshift-space distortions and also for the nonline ... [Phys. Rev. D 78, 023523 (2008)] published Fri Jul 18, 2008.
Stationary rotating strings as relativistic particle mechanics
Kouji Ogawa, Hideki Ishihara, Hiroshi Kozaki, Hiroyuki Nakano, and Shinya Saito
Stationary rotating strings can be viewed as geodesic motions in appropriate metrics in two-dimensional space. We obtain all solutions describing stationary rotating strings in flat spacetime as an application. These rotating strings have infinite length with various wiggly shapes. Averaged value of ... [Phys. Rev. D 78, 023525 (2008)] published Fri Jul 18, 2008.
Torsion cosmology and the accelerating universe
Kun-Feng Shie, James M. Nester, and Hwei-Jang Yo
Investigations of the dynamic modes of the Poincare gauge theory of gravity found only two good propagating torsion modes; they are effectively a scalar and a pseudoscalar. Cosmology affords a natural situation where one might see observational effects of these modes. Here, we consider only the scal ... [Phys. Rev. D 78, 023522 (2008)] published Fri Jul 18, 2008.
Lepton-number-driven sterile neutrino production in the early universe
Chad T. Kishimoto and George M. Fuller
We examine medium-enhanced, neutrino scattering-induced decoherent production of dark matter candidate sterile neutrinos in the early universe. In cases with a significant net lepton number we find two resonances, where the effective in-medium mixing angles are large. We calculate the lepton number ... [Phys. Rev. D 78, 023524 (2008)] published Fri Jul 18, 2008.
Rigorous approach to gravitational lensing
Minjoon Park
We revisit a weak gravitational lensing problem by constructing a setup which describes the actual system as accurately as possible and solving the null geodesic equations. Details are given for the case of a universe driven only by a cosmological constant, Lambda, which confirm the conventional res ... [Phys. Rev. D 78, 023014 (2008)] published Fri Jul 18, 2008.
Transiting exoplanets from the CoRoT space mission V. CoRoT-Exo-4b: Stellar and planetary parameters. (arXiv:0807.3739v1 [astro-ph])
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Mid-Infrared Spectroscopic Properties of Ultra-Luminous Infrared Quasars. (arXiv:0807.3653v1 [astro-ph])
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Large Scale Plane-Mirroring in the Cosmic Microwave Background WMAP5 Maps. (arXiv:0807.3652v1 [astro-ph])
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Full-Sky Weak Lensing Simulation with 70 Billion Particles. (arXiv:0807.3651v1 [astro-ph])
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Characterizing Star Formation Activity in Infrared Dark Cloud MSXDC G048.65-00.29. (arXiv:0807.3628v1 [astro-ph])
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Massive black hole binaries in gaseous nuclear discs. (arXiv:0807.3626v1 [astro-ph])
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Identifying XMM-Newton observations affected by solar wind charge exchange - Part I. (arXiv:0807.3624v1 [astro-ph])
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Reconstruction of HI power spectra with radio-interferometers to study dark energy. (arXiv:0807.3614v1 [astro-ph])
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A note on artificial deformation in object shapes due to the pixelization. (arXiv:0807.3601v1 [astro-ph])
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New M dwarf debris disk candidates in NGC 2547. (arXiv:0807.3597v1 [astro-ph])
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Spectrum and atmosphere models of irradiated transiting extrasolar giant planets. (arXiv:0807.3588v1 [astro-ph])
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Chandra Observation of the Edge-on Spiral NGC 5775: Probing the Hot Galactic Disk/Halo Connection. (arXiv:0807.3587v1 [astro-ph])
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Apparent and average acceleration of the Universe. (arXiv:0807.3577v1 [astro-ph])
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Semi-empirical white dwarf initial-final mass relationships: a thorough analysis of systematic uncertainties due to stellar evolution models. (arXiv:0807.3567v1 [astro-ph])
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Simulating radiative astrophysical flows with the PLUTO code: A non-equilibrium, multi-species cooling function. (arXiv:0807.3657v1 [astro-ph])
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Map-making in small field modulated CMB polarisation experiments: approximating the maximum-likelihood method. (arXiv:0807.3658v1 [astro-ph])
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The trigger of the AGB superwind: the importance of carbon. (arXiv:0807.3730v1 [astro-ph])
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Photoevaporation of Protoplanetary Disks. (arXiv:0807.3724v1 [astro-ph])
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Optical configuration and analysis of the AMBER/VLTI instrument. (arXiv:0807.3717v1 [astro-ph])
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SIDE, a fiber fed spectrograph for the 10.4 m Gran Telescopio Canarias (GTC). (arXiv:0807.3714v1 [astro-ph])
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The characteristic blue spectra of accretion disks in quasars as uncovered in the infrared. (arXiv:0807.3703v1 [astro-ph])
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Stars In Other Universes: Stellar structure with different fundamental constants. (arXiv:0807.3697v1 [astro-ph])
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6^Li in the atmosphere of GJ 117 Revisited. (arXiv:0807.3693v1 [astro-ph])
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Densities and filling factors of the DIG in the Solar neighbourhood. (arXiv:0807.3686v1 [astro-ph])
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Radio continuum properties of young planetary nebulae. (arXiv:0807.3684v1 [astro-ph])
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Interferometric CO Observations of submillimeter-faint, radio-selected starburst galaxies at z~2. (arXiv:0807.3674v1 [astro-ph])
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Sub-milliarcsecond precision spectro-astrometry of Be stars. (arXiv:0807.3673v1 [astro-ph])
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The Carbon Abundance and 12C/13C Isotopic Ratio in the Atmosphere of Arcturus from 2.3 micron CO Bands. (arXiv:0807.3667v1 [astro-ph])
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Twist and Turn: Weak Lensing Image Distortions to Second Order. (arXiv:0807.3663v1 [astro-ph])
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Corrugations in the Disk of the Edge-On Spiral Galaxy IC2233. (arXiv:0807.3560v1 [astro-ph])
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Astrophysical relevance of $\gamma$ transition energies. (arXiv:0807.3556v1 [astro-ph])
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Near-Infrared Photometry of the Type IIn SN 2005ip: The Case for Dust Condensation. (arXiv:0807.3555v1 [astro-ph])
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IFU observations of the GRB 980425/SN 1998bw host galaxy: emission line ratios in GRB regions. (arXiv:0807.3554v1 [astro-ph])
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An MHD Gadget for cosmological simulations. (arXiv:0807.3553v1 [astro-ph])
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Clustering of Luminous Red Galaxies IV: Baryon Acoustic Peak in the Line-of-Sight Direction and a Direct Measurement of H(z). (arXiv:0807.3551v1 [astro-ph])
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HI Clouds in the Lower Halo: I. The Galactic All-Sky Survey Pilot Region. (arXiv:0807.3550v1 [astro-ph])
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Two new diagnostics of dark energy. (arXiv:0807.3548v1 [astro-ph])
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Microphysical dissipation, turbulence and magnetic fields in hyper-accreting discs. (arXiv:0807.3547v1 [astro-ph])
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Homotopy symmetry in the multiply connected twin paradox of special relativity. (arXiv:astro-ph/0606559v6 UPDATED)
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On Fermi acceleration and MHD-instabilities at ultra-relativistic magnetized shock waves. (arXiv:0807.3459v2 [astro-ph] UPDATED)
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Signatures of reionization on Lyman alpha emitters. (arXiv:0807.2975v2 [astro-ph] UPDATED)
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One-loop graviton corrections to the curvature perturbation from inflation. (arXiv:0807.2790v2 [astro-ph] UPDATED)
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A New Spiral Arm of the Galaxy: The Far 3-Kpc Arm. (arXiv:0807.1752v2 [astro-ph] UPDATED)
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ACS imaging of star clusters in M51 II. The luminosity function and mass function across the disk. (arXiv:0806.3752v2 [astro-ph] UPDATED)
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Abundances of four open clusters from solar stars. (arXiv:0806.2280v4 [astro-ph] UPDATED)
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Mass distribution and orbital anisotropy of early-type galaxies: constraints from the Mass Plane. (arXiv:0806.0570v2 [astro-ph] UPDATED)
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Gamma ray and Neutrino fluxes from a cosmological dark matter simulation. (arXiv:0801.4673v2 [astro-ph] UPDATED)
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Time drift of cosmological redshifts as a test of the Copernican principle. (arXiv:0801.0068v2 [astro-ph] UPDATED)
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Bootes II ReBooted: An MMT/MegaCam Study of An Ultra-Faint Milky Way Satellite. (arXiv:0712.3054v2 [astro-ph] UPDATED)
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Towards observable signatures of other bubble universes II: Exact solutions for thin-wall bubble collisions. (arXiv:0712.3038v4 [hep-th] UPDATED)
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Axions and the Strong CP Problem. (arXiv:0807.3125v1 [hep-ph] CROSS LISTED)
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