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38 papers · 1 filter
Role of different type of sub-systems in doubly driven Lambda-system in 87Rb
Kanhaiya Pandey
The well known Lambda-system using two ground state hyperfine levels, F=1 and F=2 of 5S1/2 and one hyperfine level, F=2 of excited state of 5P3/2 of 87Rb has been recently studied…
Removing BAO-peak Shifts with Local Density Transforms
Nuala McCullagh, Mark C. Neyrinck, István Szapudi +1
Large-scale bulk flows in the Universe distort the initial density field, broadening the baryon-acoustic-oscillation (BAO) feature that was imprinted when baryons were strongly cou…
Analytical and numerical study of uncorrelated disorder on a honeycomb lattice
Kean Loon Lee, Benoît Grémaud, Christian Miniatura +1
We consider a tight-binding model on the regular honeycomb lattice with uncorrelated on-site disorder. We use two independent methods (recursive Green's function and self-consisten…
The effect of feedback and reionization on star formation in low-mass dwarf galaxy haloes
Christine M. Simpson, Greg L. Bryan, Kathryn V. Johnston +4
We simulate the evolution of a 10^9 Msun dark matter halo in a cosmological setting with an adaptive-mesh refinement code as an analogue to local low luminosity dwarf irregular and…
A New Grid of Synthetic Spectra for the Analysis of [WC]-type Central Stars of Planetary Nebulae
Graziela R. Keller, James E. Herald, Luciana Bianchi +2
We present a comprehensive grid of synthetic stellar-atmosphere spectra, suitable for the analysis of high resolution spectra of hydrogen-deficient post-Asymptotic Giant Branch (po…
Very Massive Stars and the Eddington Limit
Paul A. Crowther, R. Hirschi, Nolan R. Walborn +1
We use contemporary evolutionary models for Very Massive Stars (VMS) to assess whether the Eddington limit constrains the upper stellar mass limit. We also consider the interplay b…