Kavli Affiliate: Claude Canizares | First 5 Authors: David Huenemoerder, Claude Canizares, Kevin Tibbetts, , | Summary: We observed AR Lac, an eclipsing RS CVn binary star, with the Chandra High Energy Grating Spectrometer for a total of 100 ks divided into six intervals covering both quadratures and eclipses. We repeated observations at each phase. […]
Kavli Affiliate: Edmund Bertschinger | First 5 Authors: Hale Bradt, Alan M. Levine, Francis E. Marshall, Ronald A. Remillard, Donald A. Smith | Summary: The role of the Rossi X-ray Timing Explorer (RXTE) in the study of Gamma-ray Bursts (GRBs) is reviewed. Through April 2001, the All-Sky Monitor (ASM) and the Proportional Counter Array (PCA) […]
Kavli Affiliate: Anthony Zee | First 5 Authors: Daniel E. Holz, Anthony Zee, , , | Summary: As has been previously proposed, a minimal modification of the standard $SU(3)times SU(2)times U(1)$ theory provides a viable dark matter candidate. Such a particle, a scalar gauge singlet, is naturally self-interacting—making it of particular interest given recent developments […]
Kavli Affiliate: Edmund Bertschinger | First 5 Authors: Hale Bradt, Ronald A. Remillard, , , | Summary: A concept for an all-sky monitor mission substantially more powerful than the RXTE ASM is presented in brief. It makes use of 31 Gas Electron Multiplier (GEM) proportional counters to provide continuous monitoring of the entire x-ray sky, […]
Kavli Affiliate: Edmund Bertschinger | First 5 Authors: Hale Bradt, Alan Levine, Ronald Remillard, Donald A. Smith, | Summary: We present a tabulation of 46 transient x-ray sources monitored with the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer (RXTE). They fall into four broad categories: short (~d), intermediate, and long (>500 d) duration […]
Kavli Affiliate: George W. Clark | First 5 Authors: Patrick S. Wojdowski, George W. Clark, Timothy R. Kallman, , | Summary: We have investigated the composition and distribution of the wind of Sk 160, the supergiant companion of the X-ray star SMC X-1, by comparing an X-ray spectrum of the source, obtained with the ASCA […]
Kavli Affiliate: Paul McEuen | First 5 Authors: Kent L. McCormick, Michael T. Woodside, Mike Huang, Mingshaw Wu, Paul McEuen | Summary: Using an atomic force microscope as a local voltmeter, we measure the Hall voltage profile in a 2D electron gas in the quantum Hall (QH) regime. We observe a linear profile in the […]
Kavli Affiliate: Shigetaka Moriyama | First 5 Authors: Makoto Minowa, Shigetaka Moriyama, Yoshizumi Inoue, Toshio Namba, Yuko Takasu | Summary: A preliminary result of the solar axion search experiment at the University of Tokyo is presented. We searched for axions which could be produced in the solar core by exploiting the axion helioscope. The helioscope […]
Kavli Affiliate: Shigetaka Moriyama | First 5 Authors: Shigetaka Moriyama, , , , | Summary: An experimental method is introduced to search for almost monochromatic solar axions. In this method, we can search for solar axions by exploiting the axion-quark coupling, not relying on the axion-photon coupling at all. A recent experimental result of Krv […]
Kavli Affiliate: Anthony Zee | First 5 Authors: Anthony Zee, , , , | Summary: We discuss the problem of adding random matrices, which enable us to study Hamiltonians consisting of a deterministic term plus a random term. Using a diagrammatic approach and introducing the concept of “gluon connectedness," we calculate the density of energy […]