Showing 1998Show all

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astro-ph1998★ 17 cited

The Submillimeter Frontier: A Space Science Imperative

John C. Mather, S. Harvey Moseley, David Leisawitz +8

A major goal of modern astrophysics is to understand the processes by which the universe evolved from its initial simplicity, as seen in measurements of the Cosmic Microwave Backgr…

cond-mat.mtrl-sci1998★ 669 cited

Glass-Like Heat Conduction in High-Mobility Crystalline Semiconductors

J. L. Cohn, G. S. Nolas, V. Fessatidis +2

The thermal conductivity of polycrystalline semiconductors with type-I clathrate hydrate crystal structure is reported. Ge clathrates (doped with Sr and/or Eu) exhibit lattice ther…

hep-ph1998★ 951 cited

Brane Inflation

Gia Dvali, S. -H. Henry Tye

We present a novel inflationary scenario in theories with low scale (TeV) quantum gravity, in which the standard model particles are localized on the branes whereas gravity propaga…

cs.DL1998★ 4 cited

The Computing Research Repository: Promoting the Rapid Dissemination and Archiving of Computer Science Research

Joseph Y. Halpern, Carl Lagoze

We describe the Computing Research Repository (CoRR), a new electronic archive for rapid dissemination and archiving of computer science research results. CoRR was initiated in Sep…

astro-ph1998★ 2 cited

On the Particle Heating and Acceleration in Black Hole Accretion Systems

H. Li, S. A. Colgate, M. Kusunose +1

The lack of our knowledge on how angular momentum is transported in accretion disks around black holes has prevented us from fully understanding their high energy emissions. We bri…

astro-ph1998★ 192 cited

Magneto-centrifugally driven winds: comparison of MHD simulations with theory

G. V. Ustyugova, A. V. Koldoba, M. M. Romanova +2

Stationary magnetohydrodynamic (MHD) outflows from a rotating, conducting Keplerian accretion disk threaded by B-field are investigated numerically by time-dependent, axisymmetric…

physics.acc-ph1998★ 9 cited

Large angle Beamstrahlung as a beam-beam monitoring tool

G. Bonvicini, J. Welch

A novel method to measure the beam-beam interaction in e+e- colliders is presented.

astro-ph1998★ 60 cited

1620 Geographos and 433 Eros: Shaped by Planetary Tides?

W. F. Bottke, D. C. Richardson, P. Michel +1

Until recently, most asteroids were thought to be solid bodies whose shapes were determined largely by collisions with other asteroids. It now seems that many asteroids are little…

cond-mat.mtrl-sci1998★ 30 cited

Phonon-phason coupling in icosahedral quasicrystals

W. -J. Zhu, C. L. Henley

From relaxation simulations of decoration-based quasicrystal structure models using microscopically based interatomic pair potentials, we have calculated the (usually neglected) ph…

hep-ph1998★ 25 cited

Accuracy of Calculations Involving Vacuum-Polarization Diagrams: Muonic Hydrogen Lamb Shift and Muon

T. Kinoshita, M. Nio

The contribution of the single electron-loop vacuum-polarization diagrams to the Lamb shift of the muonic hydrogen has been evaluated recently by two independent methods. One…

hep-ph1998★ 66 cited

Sixth-Order Vacuum-Polarization Contribution to the Lamb Shift of the Muonic Hydrogen

T. Kinoshita, M. Nio

The sixth-order electron-loop vacuum-polarization contribution to the Lamb shift of the muonic hydrogen ( bound state) has been evaluated numerical…

hep-lat1998★ 16 cited

String breaking by dynamical fermions in three-dimensional lattice QCD

H. D. Trottier

The first observation is made of hadronic string breaking due to dynamical fermions in zero temperature lattice QCD. The simulations are done for SU(2) color in three dimensions, w…

astro-ph1998★ 146 cited

Resonant Tidal Excitations of Rotating Neutron Stars in Coalescing Binaries

Wynn C. G. Ho, Dong Lai

In a coalescing neutron star-neutron star (NS-NS) or neutron star-black hole (NS-BH) binary, oscillation modes of the NS can be resonantly excited by the companion during the final…

astro-ph1998

Three contributions to Galaxy Dynamics: distant galaxy kinematics, mass, and M/L

M. A. Bershady, A. Jangren, D. R. Andersen +3

1) Rotation Curves and M/L Evolution for Galaxies to z=0.4, (Bershady, Haynes, Giovanelli, & Andersen) 2) Mass Estimates of Starbursting Galaxies: Line Widths versus Near-IR Lumino…

hep-ph1998★ 8 cited

Weak phases and from , or and decays

Michael Gronau, Dan Pirjol

An improved flavor SU(3) method is presented for determining the weak angle of the unitarity triangle using decay rates for and (o…

astro-ph1998★ 117 cited

Magnetic propeller outflows

R. V. E. Lovelace, M. M. Romanova, G. S. Bisnovatyi-Kogan

A model is developed for magnetic `propeller'-driven outflows which cause a rapidly rotating magnetized star accreting from a disk to spin-down. Energy and angular momentum lost by…

hep-ex1998★ 48 cited

Measurement of the Branching Fractions and Form Factor

J. Bartelt

Using a sample of 3.3 million B-meson decays collected with the CLEO detector at the Cornell Electron Storage Ring, we have studied and $\bar{B}^0 \to D^+ \ellν…

hep-ex1998★ 22 cited

Search for Exclusive Rare Baryonic Decays of Mesons

T. E. Coan

We report the results of a search for the rare baryonic decay modes B -> Lambda Lambdabar, B -> Lambdabar p, B -> Lambdabar p pi, and B -> p pbar using 5.8M BBbar pairs collected w…

astro-ph1998★ 92 cited

Neutrino-Nucleon Interactions in Magnetized Neutron-Star Matter: The Effects of Parity Violation

Phil Arras, Dong Lai

We study neutrino-nucleon scattering and absorption in a dense, magnetized nuclear medium. These are the most important sources of neutrino opacity governing the cooling of a proto…

astro-ph1998★ 13 cited

Canaries in a Coal Mine: Using Globular Clusters to Place Limits on Massive Black Holes in the Galactic Halo

Phil Arras, Ira Wasserman

We explore the possibility that massive black holes comprise a significant fraction of the dark matter of our galaxy by studying the dissolution of galactic globular clusters bomba…

astro-ph1998★ 84 cited

Pulsar Spin-up, Kinematics, and the Birthrate of Neutron Star Binaries

Z. Arzoumanian, J. M. Cordes, I. Wasserman

From considerations of spin evolution and kinematics in the galactic potential, we argue that the pulsars B1913+16, B1534+12, and B2127+11C may be younger than previously assumed,…

astro-ph1998★ 36 cited

G359.87+0.18: An FR II Radio Galaxy 15 Arcminutes from Sgr A*. Implications for the Scattering Region in the Galactic Center

T. Joseph W. Lazio, K. R. Anantharamaiah, W. M. Goss +2

G359.87+0.18 is an enigmatic object located 15' from Sgr A*. It has been variously classified as an extragalactic source, Galactic jet source, and young supernova remnant. We prese…

astro-ph1998

Contribution of Bright Extragalactic Radio Sources to Microwave Anisotropy

Aaron Sokasian, Eric Gawiser, George F. Smoot

We estimate the contribution of extragalactic radio sources to fluctuations in sky temperature over the range of frequencies (10-300 GHz) used for Cosmic Microwave Background (CMB)…

astro-ph1998★ 38 cited

Spherical Bondi accretion onto a magnetic dipole

Yu. M. Toropin, O. D. Toropina, M. M. Romanova +3

Quasi-spherical supersonic (Bondi-type) accretion to a star with a dipole magnetic field is investigated using resistive magnetohydrodynamic simulations. A systematic study is made…