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Type-Ia supernovae: new clues to their progenitors from the delay-time distribution
supernovae general
2010/11/10
Despite their prominent role in cosmography, little is yet known about the nature of type-Ia supernovae (SNe Ia),from the identity of their progenitor systems, through the evolution of those systems u...
Have Baryonic Acoustic Oscillations in the galaxy distribution really been measured?
galaxies: statistics cosmology theory large-scale structure
2010/11/15
Recent publications claim that there is no convincing evidence for measurements of the baryonic acoustic (BAO) feature in galaxy samples using either monopole or radial information. Di erent claims se...
Imaging the circumstellar dust distribution around AGB stars
Imaging the circumstellar dust AGB stars
2010/11/12
Stellar light from an AGB star is scattered by the circumstellar dust and polarized in the direction perpendicular to the source. Therefore, images of circumstellar envelopes around AGB stars in polar...
The distribution of eccentricity of compact binaries
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
The current gravitational wave detectors have reached their operational sensitivity and are nearing detection of compact object binaries. In the coming years we expect that the Advanced LIGO/VIRGO wil...
Modeling of the spectral energy distribution of the cataclysmic variable TT Ari and evaluation of the system parameters
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
The spectral energy distribution (SED) of the TT Ari system, which is well known from published IUE and optical photometric observations, was modeled by a steady-state accretion \alpha-disc around a w...