Predicting Crystal Structures with Data Mining of Quantum Calculations

Kavli Affiliate: Kristin Persson | First 5 Authors: Stefano Curtarolo, Dane Morgan, Kristin Persson, John Rodgers, Gerbrand Ceder | Summary: Predicting and characterizing the crystal structure of materials is a key problem in materials research and development. It is typically addressed with highly accurate quantum mechanical computations on a small set of candidate structures, or […]


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Ratio of color and effective temperatures in X-ray burst spectra

Kavli Affiliate: P. C. Joss | First 5 Authors: A. Majczyna, J. Madej, P. C. Joss A. Różańska, , | Summary: We present model atmospheres and theoretical spectra for X-ray bursters. Our models include the effects of Compton scattering on free electrons. The atmospheres have compositions that are mixtures of hydrogen, helium, and iron. For […]


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Q factor in numerical simulations of DPSK with optical delay demodulation

Kavli Affiliate: Chris Xu | First 5 Authors: Xing Wei, Xiang Liu, Chris Xu, , | Summary: A simple model is used to estimate the Q factor in numerical simulations of differential phase shift keying (DPSK) with optical delay demodulation and balanced detection. It is found that an alternative definition of Q is needed for […]


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The X-ray Afterglows of GRB 020813 and GRB 021004 with Chandra HETGS: Possible Evidence for a Supernova Prior to GRB 020813

Kavli Affiliate: Peter G. Ford | First 5 Authors: Nathaniel R. Butler, Herman L. Marshall, George R. Ricker, Roland K. Vanderspek, Peter G. Ford | Summary: We report on the detection of an emission line near 1.3 keV, which we associate with blue-shifted hydrogen-like sulfur (S XVI), in a 76.8 ksec Chandra HETGS spectrum of […]


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Isotropic-Nematic transition of long thin hard spherocylinders confined in a quasi-two-dimensional planar geometry

Kavli Affiliate: Marileen Dogterom | First 5 Authors: Marco Cosentino Lagomarsino, Marjolein Dijkstra, Marileen Dogterom, , | Summary: We present computer simulations of long thin hard spherocylinders in a narrow planar slit. We observe a transition from the isotropic to a nematic phase with quasi-long-range orientational order upon increasing the density. This phase transition is […]


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Slow Temperature Equilibration Behind the Shock Front of SN 1006

Kavli Affiliate: Andrew Rasmussen | First 5 Authors: Jacco Vink, J. Martin Laming, Ming Feng Gu, Andrew Rasmussen, Jelle S. Kaastra | Summary: We report on the observation of OVII Doppler line broadening in a compact knot at the edge of SN 1006 detected with the Reflective Grating Spectrometer on board XMM-Newton. The observed line […]


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