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38 papers · 1 filter
UV Spectroscopy of AB Doradus with the Hubble Space Telescope. Impulsive flares and bimodal profiles of the CIV 1549 line in a young star
O. Vilhu, P. Muhli, J. Huovelin +3
We observed AB Doradus, a young and active late type star (K0 - K2 IV-V, P= 0.514 d) with the Goddard High Resolution Spectrograph of the post-COSTAR Hubble Space Telescope with th…
Multicritical Microscopic Spectral Correlators of Hermitian and Complex Matrices
G. Akemann, P. H. Damgaard, U. Magnea +1
We find the microscopic spectral densities and the spectral correlators associated with multicritical behavior for both hermitian and complex matrix ensembles, and show their unive…
Perfect Lattice Perturbation Theory: A Study of the Anharmonic Oscillator
W. Bietenholz, T. Struckmann
As an application of perfect lattice perturbation theory, we construct an O(λ) perfect lattice action for the anharmonic oscillator analytically in momentum space. In coordinate sp…
Statistical mechanics of warm and cold unfolding in proteins
Alex Hansen, Mogens H. Jensen, Kim Sneppen +1
We present a statistical mechanics treatment of the stability of globular proteins which takes explicitly into account the coupling between the protein and water degrees of freedom…
DY/DZ from fine structure in the Main Sequence based on Hipparcos parallaxes
B. E. J. Pagel, L. Portinari
The slope Delta Y/Delta Z is a quantity of interest in relation to stellar evolution, the initial mass function and the determination of the primordial helium abundance. In this pa…
Evidence for Diverse Optical Emission from Gamma-Ray Burst Sources
H. Pedersen, A. O. Jaunsen, T. Grav +25
Optical Transients from gamma-ray burst sources, in addition to offering a distance determination, convey important information on the physics of the emission mechanism, and perhap…