Distribution and Structure of Matter in and around Galaxies

Kavli Affiliate: Mark Schattenburg | First 5 Authors: Norbert S. Schulz, Glenn Allen, Mark W. Bautz, Claude C. Canizares, John Davis | Summary: Understanding the origins and distribution of matter in the Universe is one of the most important quests in physics and astronomy. Themes range from astro-particle physics to chemical evolution in the Galaxy […]


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Using Animated Textures to Visualize Electromagnetic Fields and Energy Flow

Kavli Affiliate: John Belcher | First 5 Authors: John Belcher, Carolann Koleci, , , | Summary: Animated textures can be used to visualize the spatial structure and temporal evolution of vector fields at high spatial resolution. The animation requires two time-dependent vector fields. The first of these vector fields determines the spatial structure to be […]


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Rank-ordered Multifractal Spectrum for Intermittent Fluctuations

Kavli Affiliate: Tom Chang | First 5 Authors: Tom Chang, Cheng-chin Wu, , , | Summary: We describe a new method that is both physically explicable and quantitatively accurate in describing the multifractal characteristics of intermittent events based on groupings of rank-ordered fluctuations. The generic nature of such rank-ordered spectrum leads it to a natural […]


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Effects of mode degeneracy in the LIGO Livingston Observatory recycling cavity

Kavli Affiliate: Peter K. Fritschel | First 5 Authors: Andri M. Gretarsson, Erika D’Ambrosio, Valery Frolov, Brian O’Reilly, Peter K. Fritschel | Summary: We analyze the electromagnetic fields in a Pound-Drever-Hall locked, marginally unstable, Fabry-Perot cavity as a function of small changes in the cavity length during resonance. More specifically, we compare the results of […]


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X-ray flare modeling in the single giant HR 9024

Kavli Affiliate: David Huenemoerder | First 5 Authors: Paola Testa, David Garcia-Alvarez, Fabio Reale, David Huenemoerder, | Summary: We analyze a Chandra-HETGS observation of the single G-type giant HR 9024. The high flux allows us to examine spectral line and continuum diagnostics at high temporal resolution, to derive plasma parameters (thermal distribution, abundances, temperature, …). […]


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A Galactic Origin for the Local Ionized X-ray Absorbers

Kavli Affiliate: Claude Canizares | First 5 Authors: Taotao Fang, Christopher McKee, Claude Canizares, Mark Wolfire, | Summary: Recent Chandra and XMM observations of distant quasars have shown strong local (z~0) X-ray absorption lines from highly ionized gas, primarily He-like oxygen. The nature of these X-ray absorbers, i.e., whether they are part of the hot […]


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Discovery of Oxygen Kalpha X-ray Emission from the Rings of Saturn

Kavli Affiliate: Peter G. Ford | First 5 Authors: Anil Bhardwaj, Ronald F. Elsner, J. Hunter Waite, Jr., G. Randall Gladstone, Thomas E. Cravens | Summary: Using the Advanced CCD Imaging Spectrometer (ACIS), the Chandra X-ray Observatory (CXO) observed the Saturnian system for one rotation of the planet (~37 ks) on 20 January, 2004, and […]


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Chandra Observation of an X-ray Flare at Saturn: Evidence for Direct Solar Control on Saturn’s Disk X-ray Emissions

Kavli Affiliate: Peter G. Ford | First 5 Authors: Anil Bhardwaj, Ronald F. Elsner, J. Hunter Waite Jr, G. Randall Gladstone, Thomas E. Cravens | Summary: Saturn was observed by Chandra ACIS-S on 20 and 26-27 January 2004 for one full Saturn rotation (10.7 hr) at each epoch. We report here the first observation of […]


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Model atmospheres and X-ray spectra of iron-rich bursting neutron stars. II. Iron rich Comptonized Spectra

Kavli Affiliate: P. C. Joss | First 5 Authors: A. Majczyna, J. Madej, P. C. Joss, A. Rozanska, | Summary: This paper presents the set of plane-parallel model atmosphere equations for a very hot neutron star (X-ray burst source). The model equations assume both hydrostatic and radiative equilibrium, and the equation of state of an […]


Continue.. Model atmospheres and X-ray spectra of iron-rich bursting neutron stars. II. Iron rich Comptonized Spectra