Showing 1999Show all

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astro-ph1999★ 12 cited

Precise Interplanetary Network Localization of the Bursting Pulsar GRO J1744-28

K. Hurley, C. Kouveliotou, T. Cline +8

We analyze 426 observations of the bursting pulsar GRO J1744-28 by Ulysses and BATSE. Triangulating each burst, and statistically combining the triangulation annuli, we obtain a 3…

astro-ph1999★ 13 cited

Enabling concepts for a dual spacecraft formation-flying optical interferometer for NASA's ST3 mission

Peter W. Gorham, William M. Folkner, Gary H. Blackwood

We present the enabling concept and technology for a dual spacecraft formation-flying optical interferometer, to be launched into a deep space orbit as Space Technology 3. The comb…

astro-ph1999★ 6 cited

A Spin Modulated Telescope to Make Two Dimensional CMB Maps

J. Staren, P. Meinhold, J. Childers +10

We describe the HEMT Advanced Cosmic Microwave Explorer (HACME), a balloon borne experiment designed to measure sub-degree scale Cosmic Microwave Background anisotropy over hundred…

astro-ph1999★ 18 cited

Physical State of Molecular Gas in High Galactic Latitude Translucent Clouds

James G. Ingalls, T. M. Bania, Adair P. Lane +2

The rotational transitions of carbon monoxide (CO) are the primary means of investigating the density and velocity structure of the molecular interstellar medium. Here we study the…

quant-ph1999★ 1.5k cited

Quantum Interferometric Optical Lithography: Exploiting Entanglement to Beat The Diffraction Limit

Agedi N. Boto, Pieter Kok, Daniel S. Abrams +3

Classical, interferometric, optical lithography is diffraction limited to writing features of a size lambda/2 or greater, where lambda is the optical wavelength. Using nonclassical…

astro-ph1999★ 266 cited

Axisymmetric, 3-Integral Models of Galaxies: A Massive Black Hole in NGC3379

Karl Gebhardt, Douglas Richstone, John Kormendy +8

We fit axisymmetric 3-integral dynamical models to NGC3379 using the line-of-sight velocity distribution obtained from HST/FOS spectra of the galaxy center and ground-based long-sl…

astro-ph1999★ 47 cited

The Visual Orbit and Evolutionary State of 12 Bootes

A. F. Boden, M. J. Creech-Eakman, D. Queloz

We report on the determination of the visual orbit of the double-lined spectroscopic binary system 12 Bootes with data obtained by the Palomar Testbed Interferometer in 1998 and 19…

astro-ph1999★ 213 cited

A measurement of Omega from the North American test flight of BOOMERANG

A. Melchiorri, P. A. R. Ade, P. de Bernardis +22

We use the angular power spectrum of the Cosmic Microwave Background, measured during the North American test flight of the BOOMERANG experiment, to constrain the geometry of the u…

astro-ph1999★ 137 cited

Measurement of a Peak in the Cosmic Microwave Background Power Spectrum from the North American test flight of BOOMERANG

P. D. Mauskopf, P. A. R. Ade, P. de Bernardis +31

We describe a measurement of the angular power spectrum of anisotropies in the Cosmic Microwave Background (CMB) from 0.3 degrees to ~10 degrees from the North American test flight…

astro-ph1999

A New View on Young Pulsars in Supernova Remnants: Slow, Radio-quiet, & X-ray Bright

E. V. Gotthelf, G. Vasisht

We propose a simple explanation for the apparent dearth of radio pulsars associated with young supernova remnants (SNRs). Recent X-ray observations of young remnants have revealed…

astro-ph1999★ 233 cited

High Resolution Mid-Infrared Imaging of Ultraluminous Infrared Galaxies

B. T. Soifer, G. Neugebauer, K. Matthews +9

Observations of ultraluminous infrared galaxies (ULIRGs) with an achieved resolution approaching the diffraction limit in the mid-infrared from 8 - 25 m using the Keck Telescope…

astro-ph1999★ 28 cited

Millimetre/submillimetre-wave emission line searches for high-redshift galaxies

Andrew W. Blain, D. T. Frayer, J. J. Bock +1

The redshifted spectral line radiation emitted from both atomic fine-structure and molecular rotational transitions in the interstellar medium (ISM) of high-redshift galaxies can b…

astro-ph1999★ 41 cited

High Resolution Infrared Imaging of the Compact Nuclear Source in NGC4258

R. Chary, E. E. Becklin, A. S. Evans +4

We present high resolution imaging of the nucleus of NGC4258 from 1 micron to 18 microns. Our observations reveal that the previously discovered compact source of emission is unres…

quant-ph1999★ 225 cited

Universal cloning of continuous quantum variables

N. J. Cerf, A. Ipe, X. Rottenberg

The cloning of quantum variables with continuous spectra is analyzed. A universal - or Gaussian - quantum cloning machine is exhibited that copies equally well the states of two co…

astro-ph1999★ 3 cited

A planet orbiting the star Gliese 86

D. Queloz, M. Mayor, L. Weber +7

A 4MJ planet with a 15.8day orbital period has been detected from very precise radial velocity measurements with the CORALIE echelle spectrograph. A second remote and more massive…

astro-ph1999

ISO Mid-Infrared Spectra of Reflection Nebulae

K. I. Uchida, K. Sellgren, M. W. Werner +1

We present 5-15 micron imaging spectroscopy of the reflection nebulae vdB 17 (NGC 1333), vdB 59 (NGC 2068), vdB 101, vdB 111, vdB 133 and vdB 135, obtained with the infrared camera…

astro-ph1999★ 68 cited

HST/WFPC2 and VLT/ISAAC observations of PROPLYDS in the giant HII region NGC 3603

W. Brandner, E. K. Grebel, Y. -H. Chu +6

We report the discovery of three proplyd-like structures in the giant HII region NGC 3603. The emission nebulae are clearly resolved in narrow-band and broad-band HST/WFPC2 observa…

astro-ph1999★ 82 cited

A supernova remnant coincident with the slow X-ray pulsar AX J1845-0258

B. M. Gaensler, E. V. Gotthelf, G. Vasisht

We report on Very Large Array observations in the direction of the recently-discovered slow X-ray pulsar AX J1845-0258. In the resulting images, we find a 5-arcmin shell of radio e…

astro-ph1999★ 33 cited

Caltech Faint Field Galaxy Redshift Survey IX: Source detection and photometry in the Hubble Deep Field Region

David W. Hogg, Michael A. Pahre, Kurt L. Adelberger +6

Detection and photometry of sources in the U_n, G, R, and K_s bands in a 9x9 arcmin^2 region of the sky, centered on the Hubble Deep Field, are described. The data permit construct…

astro-ph1999★ 550 cited

The HST Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on the Hubble Constant

Jeremy R Mould, John P Huchra, Wendy L Freedman +14

Since the launch of the Hubble Space Telescope nine years ago, Cepheid distances to 25 galaxies have been determined for the purpose of calibrating secondary distance indicators. A…

astro-ph1999

NICMOS Imaging of High-Redshift Radio Galaxies

A. Zirm, A. Dey, M. Dickinson +6

We have obtained near-infrared (1.6 micron) images of 11 powerful 3CR radio galaxies at redshifts 0.8 < z < 1.8 using NICMOS on board HST. The high angular resolution permits a det…

astro-ph1999★ 106 cited

The Unusual Infrared Object HDF-N J123656.3+621322

Mark Dickinson, Christopher Hanley, Richard Elston +11

We describe an object in the Hubble Deep Field North with very unusual near-infrared properties. It is readily visible in Hubble Space Telescope NICMOS images at 1.6um and from the…

astro-ph1999★ 245 cited

The Circumstellar Disk of HD 141569 Imaged with NICMOS

A. J. Weinberger, E. E. Becklin, G. Schneider +5

Coronagraphic imaging with the Near Infrared Camera and Multi Object Spectrometer on the Hubble Space Telescope reveals a large, ~400 AU (4'') radius, circumstellar disk around the…

astro-ph1999★ 126 cited

High Resolution Optical/Near-Infrared Imaging of Cool Ultraluminous Infrared Galaxies

J. A. Surace, D. B. Sanders, A. S. Evans

We present high spatial resolution (FWHM 0.3-0.8") BIHK'-band imaging of a sample of ultraluminous infrared galaxies with "cool" mid-infrared colors (f25/f60 < 0.2) which select ag…