47 Tuc: The Spectroscopic Versus CMD Age Discrepancy
We investigate current problems in obtaining reliable ages for old stellar systems based on stellar population synthesis modelling of their
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A Far-Ultraviolet Spectroscopic Survey of the Globular Cluster 47 Tuc
We present preliminary results from a FUV spectroscopic and photometric survey of the globular cluster 47 Tuc. Our main goal
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A Lack of Planets in 47 Tucanae from an HST Search
We report results from a large Hubble Space Telescope project to observe a significant (~34,000) ensemble of main sequence stars
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Astrometry of the globular cluster 47 Tuc and possible optical identification of X-ray sources
Positions of stars of 47 Tuc have been derived by the use of photographic plates and CCD frames (ESO La
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Blue horizontal branch stars in metal-rich globular clusters. II. 47 Tuc and NGC 362
Atmospheric parameters (effective temperature, surface gravity) and radial velocities are derived for 12 candidate blue horizontal branch (HB) stars in
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BVI CCD Photometry of the Globular Cluster 47 Tuc
We present $BVI$ photometry for about 16000 stars from a 220 arcmin$^{2}$ field centered 8 arcmin east of the center
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Giant Planets and Variable Stars in 47 Tucanae - a progress report of a comprehensive ground-based search
We present a short progress report of a comprehensive search for variability in the globular cluster 47 Tucanae. Using the
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Millisecond Pulsars in 47 Tucanae
Recent observations of the globular cluster 47 Tuc, made with the Parkes telescope at a wavelength of 20 cm, have
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Millisecond Radio Pulsars in 47 Tucanae
We review the properties of the 22 millisecond radio pulsars currently known in the globular cluster 47 Tucanae, and their
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Nine X ray sources in the globular cluster 47 Tucanae
We analyze ROSAT HRI observations obtained from 1992 to 1996 of the globular cluster 47 Tuc. Identifications of two X-ray
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Resolving the 47 Tucanae Distance Problem
Using a sample of 43 suitable local subdwarfs with newly acquired BVI photometry, we apply our main sequence fitting method
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Spectroscopic Analyses of the Planetary System Candidates: 55 Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762
The stars 55 Cnc, 51 Peg, 47 UMa, 70 Vir, and HD 114762 have recently been proposed to harbor planetary
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Spin Tunneling in Fe$_8$ Molecular Nanomagnets [Comment on Europhys. Lett. 47, 722, 1999, by Del Barco et al.]
Spin Tunneling in Fe8 powder : a comment on Europhys. Lett. 47, 722, 1999, by Del Berco et al.
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The Librating Companions in HD 37124, HD 12661, HD 82943, 47 Uma and GJ 876: Alignment or Antialignment?
We investigated the apsidal motion for the multi-planet systems. In the simulations, we found that the two planets of HD
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Theoretical Implications of the 47 Tuc Pulsars
Twenty millisecond radio pulsars have now been observed in the globular cluster 47 Tuc. This is by far the largest
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Variability and Spectra of Two Neutron Stars in 47 Tucanae
We report spectral and variability analysis of two quiescent low mass x-ray binaries (previously identified with ROSAT HRI as X5
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X-ray and Optical Studies of Millisecond Pulsars in 47 Tucanae
Our Chandra X-ray observation of the globular cluster 47 Tuc clearly detected most of the 16 MSPs with precise radio
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Chandra on Millisecond Pulsars in Globular Clusters
We summarize the x-ray properties of the complete samples of millisecond pulsars (MSPs) detected in our Chandra observations of the
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Extremely Close-In Giant Planets from Tidal Capture
Planets that form around stars born in dense stellar environments are subject to dynamical perturbations from other stars in the
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A time-delay determination from VLA light curves of the CLASS gravitational lens B1600+434
We present Very Large Array (VLA) 8.5-GHz light curves of the two lens images of the Cosmic Lens All Sky
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Hipparcos subdwarf parallaxes - metal-rich clusters and the thick disk
We have used main-sequence fitting to calibrate the distances to the globular clusters NGC 6397, M5, NGC 288, M71 and
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Mixing processes during the evolution of red giants with moderate metal deficiencies : the role of molecular-weight barriers
We have assembled accurate abundance data for Li, C, and N as well as the 12C/13C ratio for five field
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On the Maximum Binary Fraction in Globular Cluster Cores
We study the evolution of binary stars in globular clusters using a novel approach combining a state-of-the-art population synthesis code
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Search for periodic gravitational radiation with the ALLEGRO gravitational wave detector
We describe the search for a continuous signal of gravitational radiation from a rotating neutron star in the data taken
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