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31 papers · 2 filters
Disk winds of B[e] supergiants
F. -J. Zickgraf
The class of B[e] supergiants is characterized by a two-component stellar wind consisting of a normal hot star wind in the polar zone and a slow and dense disk-like wind in the equ…
Structure and properties of transition fronts in accretion discs
Kristen Menou, Jean-Marie Hameury, Rudolf Stehle
We use high-resolution time-dependent numerical simulations of accretion discs around white dwarfs to study the structure and properties of transition fronts in the context of the…
Large-scale structures in the distribution of X-ray selected AGN
D. Engels, F. Tesch, C. Ledoux +5
We are searching for large-scale structures in the distribution of AGN discovered by the ROSAT All-Sky Survey. The RASS detected > 60000 X-ray objects, of which approximately 35% a…
A critical look at the role of AGB stars in stellar population synthesis
A. Lancon
Asymptotic giant branch stars are essential contributors to the near and mid-IR emission of intermediate age (0.1-1Gyr old) stellar populations. Detecting this light sets constrain…
Approximating the Likelihood Function of CMB Experiments
J. G. Bartlett, A. Blanchard, M. Douspis +1
We discuss the problem of constraining cosmological parameters with cosmic microwave background band--power estimates. Because these latter are variances, they do not have gaussian…
Evidence for Scale-Scale Correlations in the Cosmic Microwave Background Radiation
Jesus Pando, David Valls-Gabaud, Li-Zhi Fang
We perform a discrete wavelet analysis of the COBE-DMR 4yr sky maps and find a significant scale-scale correlation on angular scales from about 11 to 22 degrees, only in the DMR fa…