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astro-ph2000★ 47 cited

The Stellar Content and Distance of UGC 4483

A. E. Dolphin, L. Makarova, I. D. Karachentsev +7

We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V ~ 26.0 and I ~…

astro-ph2000★ 221 cited

Dust Migration and Morphology in Optically Thin Circumstellar Gas Disks

Taku Takeuchi, Pawel Artymowicz

We analyze the dynamics of gas-dust coupling in the presence of stellar radiation pressure in circumstellar gas disks, which are in a transitional stage between the gas-dominated,…

cond-mat.dis-nn2000★ 2 cited

Scaling properties of the critical behavior in the dilute antiferromagnet Fe(0.93)Zn(0.07)F2

Z. Slanic, D. P. Belanger, J. A. Fernandez-Baca

Critical scattering analyses for dilute antiferromagnets are made difficult by the lack of predicted theoretical line shapes beyond mean-field models. Nevertheless, with the use of…

astro-ph2000★ 3.3k cited

Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant

W. L. Freedman, B. F. Madore, B. K. Gibson +12

We present here the final results of the Hubble Space Telescope Key Project to measure the Hubble constant. We summarize our method, the results and the uncertainties, tabulate our…

cond-mat.dis-nn2000★ 1 cited

Reply to Comment on "Nature of Spin Glass State"

Matteo Palassini, A. P. Young

This is a reply to cond-mat/0010033 by Newman and Stein, which is a comment on on our paper Phys. Rev. Lett. 85, 3017 (2000), cond-mat/0002134.

astro-ph2000★ 155 cited

First Results from the Anglo-Australian Planet Search - A Brown Dwarf Candidate and a 51 Peg-like Planet

C. G. Tinney, R. Paul Butler, Geoffrey W. Marcy +5

We report results from the Anglo-Australian Planet Search -- a survey for planets around 200 solar-type stars in the southern hemisphere, which is being carried out on the 3.9m Ang…

astro-ph2000★ 20 cited

The DEEP2 Redshift Survey

Marc Davis, Jeffrey Newman, Sandra Faber +1

The DEIMOS spectrograph is nearing completion in the UC Lick shops and will be delivered to the Keck Observatory in 2001. Once it is operational, a team of astronomers will initiat…

astro-ph2000★ 37 cited

MACHO 96-LMC-2: Lensing of a Binary Source in the LMC and Constraints on the Lensing Object

C. Alcock, R. A. Allsman, D. R. Alves +21

We present photometry and analysis of the microlensing alert MACHO 96-LMC-2. The ~3% photometry provided by the Global Microlensing Alert Network follow--up effort reveals a period…

astro-ph2000★ 32 cited

Ultraviolet and Optical Observations of OB Associations and Field Stars in the Southwest Region of the Large Magellanic Cloud

Joel Wm. Parker, Dennis Zaritsky, Theodore P. Stecher +2

Using photometry from the Ultraviolet Imaging Telescope (UIT) and photometry and spectroscopy from three ground-based optical datasets we have analyzed the stellar content of OB as…

astro-ph2000★ 111 cited

Winds from massive stars: implications for the afterglows of gamma-ray bursts

Enrico Ramirez-Ruiz, Lynnette M. Dray, Piero Madau +1

Recent observations suggest that long-duration gamma-ray bursts (GRBs) and their afterglows are produced by highly relativistic jets emitted in core-collapse explosions. The pre-ex…

astro-ph2000★ 423 cited

Towards a Precise Measurement of Matter Clustering: Lyman-alpha Forest Data at Redshifts 2-4

Rupert A. C. Croft, David H. Weinberg, Mike Bolte +5

We measure the filling factor, correlation function, and power spectrum of transmitted flux in a large sample of Lya forest spectra, comprised of 30 Keck HIRES spectra and 23 Keck…

astro-ph2000★ 67 cited

The M31 Globular Cluster Luminosity Function

P. Barmby, J. P. Huchra, J. P. Brodie

We combine our compilation of photometry of M31 globular cluster and probable cluster candidates with new near-infrared photometry for 30 objects. Using these data we determine the…

astro-ph2000★ 201 cited

Presupernova Evolution with Improved Rates for Weak Interactions

A. Heger, S. E. Woosley, G. Martinez-Pinedo +1

Recent shell-model calculations of weak-interaction rates for nuclei in the mass range A = 45 - 65 have resulted in substantial revisions to the hitherto standard set of Fuller, Fo…

astro-ph2000★ 52 cited

Probing Galaxy Formation with High Energy Gamma-Rays

Joel R. Primack, Rachel S. Somerville, James S. Bullock +1

We discuss how measurements of the absorption of -rays from GeV to TeV energies via pair production on the extragalactic background light (EBL) can probe important issues in gal…

astro-ph2000

The Optical Extragalactic Background Light from Resolved Galaxies

Lucia Pozzetti, Piero Madau

We discuss the ultraviolet to near-IR galaxy counts from the deepest imaging surveys, including the northern and southern Hubble Deep Fields. The logarithmic slope of the galaxy nu…

math.GR2000

The Sign Representation for Shephard Groups

Peter Orlik, Victor Reiner, Anne V. Shepler

Shephard groups are unitary reflection groups arising as the symmetries of regular complex polytopes. For a Shephard group, we identify the representation carried by the principal…

hep-ex2000★ 58 cited

Search for Supersymmetric Particles in e+e- Collisions at sqrt(s) up to 202GeV and Mass Limit for the Lightest Neutralino

ALEPH Collaboration

Searches for pair production of squarks, sleptons, charginos, and neutralinos are performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies from 188…

hep-ex2000★ 170 cited

Observation of an Excess in the Search for the Standard Model Higgs Boson at ALEPH

ALEPH Collaboration

A search has been performed for the Standard Model Higgs boson in the data sample collected with the ALEPH detector at LEP, at centre-of-mass energies up to 209GeV. An excess of 3s…

astro-ph2000★ 7 cited

The globular cluster system of the young elliptical NGC 6702

A. Georgakakis, D. A. Forbes, J. P. Brodie

We study the globular cluster (GC) system of the dust-lane elliptical galaxy NGC 6702, using B, V and I-band photometric observations carried out at the Keck telescope. This galaxy…

astro-ph2000★ 96 cited

The Merger of a Helium Star and a Black Hole: Gamma-Ray Bursts

Weiqun Zhang, Chris L. Fryer

There is growing observational evidence that gamma-ray bursts (GRBs) are powered by black holes accreting rapidly through a disk. The supernova-like outburst that accompanies some…

astro-ph2000★ 1 cited

Star Formation from Turbulent Fragmentation

Ralf Klessen

Star formation is intimately linked to the dynamical evolution of molecular clouds. Turbulent fragmentation determines where and when protostellar cores form, and how they contract…

astro-ph2000★ 160 cited

The DEEP Groth Strip Survey X: Number Density and Luminosity Function of Field E/S0 Galaxies at z < 1

Myungshin Im, L. Simard, S. M. Faber +7

We present the luminosity function and color-redshift relation of a magnitude-limited sample of 145 mostly red field E/S0 galaxies at z < 1 from the DEEP Groth Strip Survey (GSS).…

astro-ph2000★ 939 cited

A universal angular momentum profile for galactic halos

James S. Bullock, Avishai Dekel, Tsafrir S. Kolatt +4

[Abridged] We study the angular-momentum profiles of a statistical sample of halos drawn from a high-resolution N-body simulation of the LCDM cosmology. We find that the cumulative…

quant-ph2000★ 3 cited

The Observer in the Quantum Experiment

Bruce Rosenblum, Fred Kuttner

A goal of most interpretations of quantum mechanics is to avoid the apparent intrusion of the observer into the measurement process. Such intrusion is usually seen to arise because…