Showing 2004Show all

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astro-ph2004★ 2 cited

Covariance of the One-Dimensional Mass Power Spectrum

Hu Zhan, Daniel Eisenstein

We analyse the covariance of the one-dimensional mass power spectrum along lines of sight. The covariance reveals the correlation between different modes of fluctuations in the cos…

hep-ph2004★ 35 cited

What Black Holes Can Teach Us

Sabine Hossenfelder

Black holes merge together different field of physics. From General Relativity over thermodynamics and quantum field theory, they do now also reach into the regime of particle and…

astro-ph2004★ 14 cited

The Neon Abundance of Galactic Wolf-Rayet Stars

J. D. T. Smith, J. R. Houck

The fast, dense winds which characterize Wolf-Rayet (WR) stars obscure their underlying cores, and complicate the verification of evolving core and nucleosynthesis models. Core evo…

astro-ph2004★ 12 cited

Primary Versus Secondary Leptons in the EGRET SNR's

Marco Fatuzzo, Fulvio Melia

The EGRET supernova remnants (SNR's) are all expanding into nearby dense molecular clouds, powering a shock at the interface where protons and electrons accelerate to relativistic…

astro-ph2004★ 97 cited

B-type Supergiants in the SMC: Chemical compositions and comparison of static and unified models

P. L. Dufton, R. S. I. Ryans, C. Trundle +4

High-resolution UCLES/AAT spectra are presented for nine B-type supergiants in the SMC, chosen on the basis that they may show varying amounts of nuclear-synthetically processed ma…

astro-ph2004★ 118 cited

Fundamental Properties of O-Type Stars

Sara R. Heap, Thierry Lanz, Ivan Hubeny

We present a comprehensive analysis of high-resolution, far-UV HST/STIS, FUSE, and optical spectra of 17 O stars in the SMC. Our analysis is based on NLTE metal line-blanketed mode…

astro-ph2004★ 20 cited

Resolved Mid-Infrared Emission Around AB Aur and V892 Tau with Adaptive Optics Nulling Interferometric Observations

W. M. Liu, P. M. Hinz, W. F. Hoffmann +3

We present the results of adaptive optics nulling interferometric observations of two Herbig Ae stars, AB Aur and V892 Tau. Our observations at 10.3 microns show resolved circumste…

cond-mat.other2004★ 5 cited

Molecule formation as a diagnostic tool for second order correlations of ultra-cold gases

D. Meiser, C. P. Search, P. Meystre

We calculate the momentum distribution and the second-order correlation function in momentum space, for molecular dimers that are coherently formed fr…

astro-ph2004★ 55 cited

The Outburst of V1647 Ori Revealed by Spitzer

J. Muzerolle, S. T. Megeath, K. M. Flaherty +4

We present Spitzer Space Telescope observations of V1647 Ori, the outbursting source lighting McNeil's nebula, taken near the optical peak of the outburst in early March 2004. The…

astro-ph2004★ 133 cited

Planets and IR Excesses: Preliminary Results from a Spitzer/MIPS Survey of Solar-Type Stars

C. A. Beichman, G. Bryden, G. H. Rieke +10

As part of a large Spitzer/MIPS GTO program, we have searched for infrared excesses due to debris disks toward 26 FGK field stars known from radial velocity (RV) studies to have on…

astro-ph2004★ 101 cited

Discovery of Two Very Low-Mass Binaries: Final Results of an Adaptive Optics Survey of Nearby M6.0-M7.5 Stars

Nick Siegler, Laird M. Close, Kelle L. Cruz +2

We present updated results of a high-resolution, magnitude limited (Ks<12 mag) imaging survey of nearby low-mass M6.0-M7.5 field stars. The observations were carried out using adap…

astro-ph2004★ 47 cited

The Luminosity Functions of the Galaxy Cluster MS1054-0321 at z=0.83 based on ACS Photometry

Tomotsugu Goto, Marc Postman, Nicholas J. G. Cross +41

We present new measurements of the galaxy luminosity function (LF) and its dependence on local galaxy density, color, morphology, and clustocentric radius for the massive z=0.83 cl…

astro-ph2004★ 55 cited

A near-IR spectroscopic search for very-low-mass cool companions to notable DA white dwarfs

P. D. Dobbie, M. R. Burleigh, A. J. Levan +5

We have undertaken a detailed near-IR spectroscopic analysis of eight notable white dwarfs, predominantly of southern declination. In each case the spectrum failed to reveal compel…

quant-ph2004★ 80 cited

Quantum state reconstruction via continuous measurement

Andrew Silberfarb, Poul S. Jessen, Ivan H. Deutsch

We present a new procedure for quantum state reconstruction based on weak continuous measurement of an ensemble average. By applying controlled evolution to the initial state new i…

astro-ph2004★ 68 cited

The Neutrino Bubble Instability: A Mechanism for Generating Pulsar Kicks

Aristotle Socrates, Omer Blaes, Aimee Hungerford +1

An explanation for the large random velocities of pulsars is presented. Like many other models, we propose that the momentum imparted to the star is given at birth. The ultimate so…

astro-ph2004★ 25 cited

Recombination Line vs. Forbidden Line Abundances in Planetary Nebulae

Mark Robertson-Tessi, Donald R. Garnett

Recombination lines (RLs) of C II, N II, and O II in planetary nebulae (PNs) have been found to give abundances that are much larger in some cases than abundances from collisionall…

astro-ph2004★ 97 cited

No cold dust within the supernova remnant Cassiopeia A

O. Krause, S. M. Birkmann, G. H. Rieke +4

A large amount (about three solar masses) of cold (18 K) dust in the prototypical type II supernova remnant Cassiopeia A was recently reported. It was concluded that dust productio…

astro-ph2004★ 49 cited

The Transformation of Cluster Galaxies at Intermeidate Redshift

N. L. Homeier, R. Demarco, P. Rosati +17

We combine imaging data from the Advanced Camera for Surveys (ACS) with VLT/FORS optical spectroscopy to study the properties of star-forming galaxies in the z=0.837 cluster CL0152…

astro-ph2004★ 34 cited

Millimeter Wavelength Brightness Fluctuations of the Atmosphere Above the South Pole

R. S. Bussmann, W. L. Holzapfel, C. L. Kuo

We report measurements of the millimeter wavelength brightness fluctuations produced by the atmosphere above the South Pole made with the Arcminute Cosmology Bolometer Array Receiv…

nucl-th2004★ 59 cited

Centrality Dependence of Bulk Fireball Properties at RHIC

Johann Rafelski, Jean Letessier, Giorgio Torrieri

We explore the centrality dependence of properties of the dense hadronic matter created in \sqrt{s_{NN}}=200 GeV Au--Au collisions at RHIC. Using the statistical hadronization mode…

nucl-th2004★ 77 cited

Effective operators within the ab initio no-core shell model

Ionel Stetcu, Bruce R. Barrett, Petr Navratil +1

We implement an effective operator formalism for general one- and two-body operators, obtaining results consistent with the no-core shell model (NCSM) wave functions. The Argonne V…

hep-th2004★ 33 cited

A Calculable Toy Model of the Landscape

Keith R. Dienes, Emilian Dudas, Tony Gherghetta

Motivated by recent discussions of the string-theory landscape, we propose field-theoretic realizations of models with large numbers of vacua. These models contain multiple U(1) ga…

hep-ph2004★ 3 cited

Heavy Flavor Probes of Quark Matter

R. L. Thews

A brief survey of the role of heavy flavors as a probe of the state of matter produced by high energy heavy ion collisions is presented. Specific examples include energy loss, init…

cond-mat.stat-mech2004★ 12 cited

Fluctuations in the formation time of ultracold dimers from fermionic atoms

H. Uys, T. Miyakawa, D. Meiser +1

We investigate the temporal fluctuations characteristic of the formation of molecular dimers from ultracold fermionic atoms via Raman photoassociation. The quantum fluctuations inh…