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Solar Flares and Coronal Mass Ejections: A Statistically Determined Flare Flux-CME Mass Correlation
Flares Coronal mass ejections
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2010/11/9
In an effort to examine the relationship between flare flux and corresponding CME mass, we temporally and spatially correlate all X-ray flares and CMEs in the LASCO and GOES archives from 1996 to 2006...
Testing gravity using the growth of large scale structure in the Universe
Methods numerical — Cosmology theory — dark energy
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2010/11/15
Future galaxy surveys hope to distinguish between the dark energy and modified gravity
scenarios for the accelerating expansion of the Universe using the distortion of clustering in
redshift space. ...
Mass Transfer in Binary Stars using SPH. II. Eccentric Binaries
binaries close — stars evolution — hydrodynamics — methods numerical
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2010/11/12
Despite numerous efforts to better understand binary star evolution, some aspects of it remain
poorly constrained. In particular, the evolution of eccentric binaries has remained elusive mainly becau...
Baryon Loaded Relativistic Blastwaves in Supernovae
gamma ray bursts supernovae individual shock waves radiation mechanisms
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2010/11/15
We provide a new analytic blastwave solution which generalizes the Blandford-McKee solution to
arbitrary ejecta masses and Lorentz factors. Until recently relativistic supernovae have been discovered...
Antisymmetry in the Faraday Rotation Sky Caused by a Nearby Magnetized Bubble
magnetic fields polarization ISM bubbles ISM: magnetic fields Galaxy
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2010/11/9
Rotation measures of pulsars and extragalactic point sources have been known to reveal largescale antisymmetries in the Faraday rotation sky with respect to the Galactic plane and halo that have been ...
Accretion Discs with an Inner Spiral Density Wave
accretion accretion discs - binaries general - binaries close - stars dwarf novae - novae
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2010/11/16
In Montgomery (2009a), we show that accretion discs in binary systems could retrogradely precess by the same physics that causes the Earth to retrogradely precess [i.e., tidal torques by the Moon and ...
Galaxy metallicity near and far
Galaxy metallicity
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2010/11/9
Metallicity appears to be one the most important tool to study the formation and evolution of galaxies. Recently, we have shown that metallicity of local galaxies is tightly related not only to stella...
Cosmic acceleration and the challenge of modifying gravity
Cosmic acceleration challenge of modifying gravity
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2010/11/10
I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. Foremost among these are the ques...
The Relationship Between Molecular Gas and Star Formation in Low-Mass E/S0 Galaxies
Relationship Between Molecular Gas Star Formation
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2010/11/11
We consider the relationship between molecular-gas and star-formation sur-face densities in 19 morphologically defined E/S0s with stellar mass . 4 × 1010M⊙, paying particular attention to those found ...
Dynamics of Protoplanetary Disks
protoplanetary disks accretion pre-main-sequence stars
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2010/11/11
Protoplanetary disks are quasi-steady structures whose evolution and dispersal determine the environ-ment for planet formation. I review the theory of protoplanetary disk evolution and its connection ...
Effects of Turbulence, Eccentricity Damping, and Migration Rate on the Capture of Planets into Mean Motion Resonance
planetary systems planetary systems formation — planets and satellites formation — turbulence
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2010/11/11
Pairs of migrating extrasolar planets often lock into mean motion resonance as they drift inward. This paper studies the convergent migration of giant planets (driven by a circumstellar disk) and dete...
Observational constraints on Chaplygin cosmology in a braneworld scenario with induced gravity and curvature effect
Cosmology Dark energy -Cosmology theory- Cosmology Observations
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2010/11/16
We study cosmological dynamics and late-time evolution of an extended induced grav-ity braneworld scenario. In this scenario, curvature effects are taken into account via the
Gauss-Bonnet term in the...
SUNGLASS: A new weak lensing simulation pipeline
Gravitational lensing Cosmology large scale structure of Universe Methods N-Body simulations
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2010/11/11
A new cosmic shear analysis pipeline SUNGLASS (Simulated UNiverses for Gravitational Lensing Analysis and Shear Surveys) is introduced. SUNGLASS is a pipeline that rapidly generates simulated universe...
Complementarity of Weak Lensing and Peculiar Velocity Measurements in Testing General Relativity
Complementarity of Weak Lensing Peculiar Velocity Measurements General Relativity
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2010/11/12
We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to
better constrain modifications to General Relativity. We find no evidence for deviations from GR on cosmolo...
Star formation trends in high-redshift galaxy surveys: the elephant or the tail?
high-redshift galaxy elephan tail
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2010/11/15
Star formation rate and accummulated stellar mass are two fundamental physical quantities that describe the evolutionary state of a forming galaxy. Two recent at-tempts to determine the relationship b...