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Context: Hard X-rays from solar flares are an important diagnostic of particle acceleration and transport in the solar atmosphere. Any observed X-ray flux from on-disc sources is composed of direct em...
Interpreting the Evolution of the Size - Luminosity Relation for Disk Galaxies from Redshift 1 to the Present
galaxies evolution — galaxies formation — methods N-Body simulations
2010/11/9
A sample of very high resolution cosmological disk galaxy simulations is used to investigate the evolution of galaxy disk sizes back to redshift 1 within the CDM cosmology. Artificial images in the r...
A geometric solution to the coincidence problem, and the size of the landscape as the origin of hierarchy
coincidence problem size origin of hierarchy
2010/11/16
Without assuming necessary conditions for observers such as galaxies or entropy production, we
show that the causal patch measure predicts the coincidence of vacuum energy and present matter
density...
Runaway Growth During Planet Formation: Explaining the Size Distribution of Large Kuiper Belt Objects
circumstellar matter Kuiper belt planetary systems general planets and satellites
2010/11/9
Runway growth is an important stage in planet formation during which large protoplanets form,
while most of the initial mass remains in small planetesimals. The amount of mass converted into large pr...
Morphology and Size Differences between Local & High Redshift Luminous Infrared Galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
We show that the star-forming regions in high-redshift luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) and submillimeter galaxies (SMGs) have similar physical scales to those in local ...
A strong variation of accretion disc corona size with Luminosity in lmxb
accretion disc corona size Luminosity
2009/6/17
A strong variation of accretion disc corona size with Luminosity in lmxb。