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8 papers · 1 filter
Is a symmetric matter-antimatter universe excluded?
Julien Baur, Alain Blanchard, Peter Von Ballmoos
We consider a non-standard cosmological model in which the universe contains as much matter as antimatter on large scales and presents a local baryon asymmetry. A key ingredient in…
Turbulent dynamo in a collisionless plasma
F. Rincon, F. Califano, A. A. Schekochihin +1
Magnetic fields pervade the entire Universe and affect the formation and evolution of astrophysical systems from cosmological to planetary scales. The generation and dynamical ampl…
A new parameterization of the reionisation history
Marian Douspis, Nabila Aghanim, Stéphane Ilić +1
Motivated by the current constraints on the epoch of reionisation from recent cosmic microwave background observations, ionising background measurements of star-forming galaxies, a…
Estimating stellar fundamental parameters using PCA: application to early type stars of GES data
W. Farah, M. Gebran, F. Paletou +1
This work addresses a procedure to estimate fundamental stellar parameters such as T eff , logg, [Fe/H], and v sin i using a dimensionality reduction technique called Principal Com…
NuSTAR discovery of an unusually steady long-term spin-up of the Be binary 2RXP J130159.6-635806
Roman A. Krivonos, Sergey S. Tsygankov, Alexander A. Lutovinov +14
We present spectral and timing analysis of NuSTAR observations of the accreting X-ray pulsar 2RXP J130159.6-635806. The source was serendipitously observed during a campaign focuse…
Principal component analysis-based inversion of effective temperatures for late-type stars
F. Paletou, M. Gebran, E. R. Houdebine +1
We show how the range of application of the principal component analysis-based inversion method of Paletou et al. (2015) can be extended to late-type stars data. Besides being an e…