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19912026
Showing 2002 · astro-phShow all

70 papers · 2 filters

astro-ph2002★ 130 cited

Estimates of Cosmological Parameters Using the CMB Angular Power Spectrum of ACBAR

J. H. Goldstein, P. A. R. Ade, J. J. Bock +14

We report an investigation of cosmological parameters based on the measurements of anisotropy in the cosmic microwave background radiation (CMB) made by ACBAR. We use the ACBAR dat…

astro-ph2002★ 36 cited

A layered edge-on circumstellar disk around HK Tau B

G. Duchene, F. Menard, K. Stapelfeldt +1

We present the first high angular resolution 1.4mm and 2.7mm continuum maps of the T Tauri binary system HK Tau obtained with the Plateau de Bure Interferometer. The contributions…

astro-ph2002★ 56 cited

Models for Evolution of Dusty Galaxies and E/S0s Seen in Multiband Surveys

C. K. Xu, C. J. Lonsdale, D. L. Shupe +3

Phenomenological models for evolution of dusty galaxies and E/S0 galaxies, respectively, are developed to address two major questions concenring galaxy populations in deep infrared…

astro-ph2002★ 367 cited

High Resolution Observations of the CMB Power Spectrum with ACBAR

C. L. Kuo, P. A. R. Ade, J. J. Bock +11

We report the first measurements of anisotropy in the cosmic microwave background (CMB) radiation with the Arcminute Cosmology Bolometer Array Receiver (ACBAR). The instrument was…

astro-ph2002

All Sky Doppler Extrasolar Planet Surveys with a Multi-object Dispersed Fixed-delay Interferometer

Jian Ge, Suvrath Mahadevan, Julian van Eyken +2

We propose to use a high throughput and high precision multi-object dispersed fixed-delay interferometer for all sky Doppler surveys for extrasolar planets. This instrument, a comb…

astro-ph2002★ 120 cited

Improved Measurement of the Angular Power Spectrum of Temperature Anisotropy in the CMB from Two New Analyses of BOOMERANG Observations

J. E. Ruhl, P. A. R. Ade, J. J. Bock +27

We report the most complete analysis to date of observations of the Cosmic Microwave Background (CMB) obtained during the 1998 flight of BOOMERANG. We use two quite different metho…

astro-ph2002★ 37 cited

Optical and Near-Infrared Spectroscopy of a High-Redshift, Hard X-ray Emitting Spiral Galaxy

Steve Dawson, Nate McCrady, Daniel Stern +4

We present optical and near-infrared Keck spectroscopy of CXOHDFN J123635.6+621424 (hereafter HDFX28), a hard X-ray source at a redshift of z = 2.011 in the flanking fields of the…

astro-ph2002★ 118 cited

The Inner Rings of Beta Pictoris

Z. Wahhaj, D. W. Koerner, M. E. Ressler +3

We present Keck images of the dust disk around Beta Pictoris at 17.9 microns that reveal new structure in its morphology. Within 1" (19 AU) of the star, the long axis of the dust e…

astro-ph2002★ 110 cited

The Discovery of H2O Maser Emission in Seven AGN and at High Velocities in the Circinus Galaxy

L. J. Greenhill, P. T. Kondratko, J. E. J. Lovell +4

We report the discovery of H2O maser emission at 1.35 cm wavelength in seven active galactic nuclei (at distances up to <80 Mpc) during a survey conducted at the 70-m diameter ante…

astro-ph2002★ 95 cited

Shaping Proto-Planetary and Young Planetary Nebulae with Collimated Fast Winds

Chin-Fei Lee, Raghvendra Sahai

Using two-dimensional hydrodynamical simulations, we investigate the interaction of a collimated fast wind (CFW) interacting with a spherical asymptotic giant branch (AGB) wind as…

astro-ph2002★ 1 cited

Results from a Complete Chandra Survey of Radio Jets

D. A. Schwartz, H. L. Marshall, B. P. Miller +7

We report preliminary results from the first targets observed as part of a program to image the X-ray jets in a complete sample of radio selected jets. We have acquired Australian…

astro-ph2002★ 20 cited

Structure of the Mid-Infrared Emitting Disk Around WL16

Michael E. Ressler, Mary Barsony

WL16 is a unique member of the embedded young stellar population in the nearby rho Ophiuchi cloud core: its extended (900 AU diameter), high surface brightness disk is visible only…

astro-ph2002★ 1 cited

The Magnetic Field in the Convection Zone

Alberto Bigazzi, Alexander A. Ruzmaikin

One of the key questions in solar physics that remains to be answered concerns the strength and the distribution of the magnetic fields at the base of the convection zone. The flux…

astro-ph2002★ 48 cited

The Spectral Correlation Function of Molecular Clouds: A Statistical Test for Theoretical Models

Paolo Padoan, Alyssa Goodman, Mika Juvela

We compute the spectral correlation function (SCF) of 13CO J=1--0 maps of molecular cloud complexes. The SCF is a power law over approximately an order of magnitude in spatial sepa…

astro-ph2002★ 19 cited

BATSE Soft Gamma-Ray Observations of GROJ0422+32

J. C. Ling, Wm. A. Wheaton

We report results of a comprehensive study of the soft gamma-ray (30 keV to 1.7 MeV) emission of GROJ0422+32 during its first known outburst in 1992. These results were derived fro…

astro-ph2002★ 48 cited

Angular Size Measurements Of Mira Variable Stars At 2.2 Microns. II

G. T. van Belle, R. R. Thompson, M. J. Creech-Eakman

We present angular size measurements of 22 oxygen-rich Mira variable stars. These data are part of a long term observational program using the Infrared Optical Telescope Array (IOT…

astro-ph2002★ 203 cited

Cosmological constraints from Archeops

A. Benoit, P. Ade, A. Amblard +65

We analyze the cosmological constraints that Archeops places on adiabatic cold dark matter models with passive power-law initial fluctuations. Because its angular power spectrum ha…

astro-ph2002★ 189 cited

The Cosmic Microwave Background Anisotropy Power Spectrum measured by Archeops

A. Benoit, P. Ade, A. Amblard +65

We present a determination by the Archeops experiment of the angular power spectrum of the cosmic microwave background anisotropy in 16 bins over the multipole range l=15-350. Arch…

astro-ph2002★ 14 cited

Ellipticity analysis of the BOOMERanG CMB maps

V. G. Gurzadyan, P. A. R. Ade, P. de Bernardis +20

The properties of the Cosmic Microwave Background (CMB) maps carry valuable cosmological information. Here we report the results of the analysis hot and cold CMB anisotropy spots i…

astro-ph2002★ 136 cited

Application of Monte Carlo Algorithms to the Bayesian Analysis of the Cosmic Microwave Background

J. Jewell, S. Levin, C. H. Anderson

Power spectrum estimation and evaluation of associated errors in the presence of incomplete sky coverage; non-homogeneous, correlated instrumental noise; and foreground emission is…

astro-ph2002★ 203 cited

Spectroscopic Confirmation of Three Redshift 5.7 Lyman-alpha Emitters from the Large Area Lyman Alpha Survey

James E. Rhoads, Arjun Dey, Sangeeta Malhotra +5

Narrow-band searches for Lyman alpha emission are an efficient way of identifying star-forming galaxies at high redshifts. We present Keck telescope spectra confirming redshifts z…

astro-ph2002★ 63 cited

The Redshift of the Lensed Object in the Einstein Ring B0218+357

Judith G. Cohen, Charles R. Lawrence, Roger D. Blandford

We present a secure redshift of z=0.944\pm0.002 for the lensed object in the Einstein ring gravitational lens B0218+357 based on five broad emission lines, in good agreement with o…

astro-ph2002★ 520 cited

Science Objectives and Early Results of the DEEP2 Redshift Survey

Marc Davis, Sandra M. Faber, Jeffrey A. Newman +18

The DEIMOS spectrograph has now been installed on the Keck-II telescope and commissioning is nearly complete. The DEEP2 Redshift Survey, which will take approximately 120 nights at…

astro-ph2002

Star Formation and the Initial Mass Function

Aake Nordlund, Paolo Padoan

Supersonic turbulence fragments the interstellar medium into dense sheets, filaments, cores and large low density voids. The turbulence is driven on large scales, probably predomin…