Chromospheric Activity in Metal-Poor Dwarfs
We have obtained echelle spectra with the Hubble Space Telescope (HST) of the MgII 2800A region of ten stars whose
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Maximal-acceleration phase space relativity from Clifford algebras
We present a new physical model that links the maximum speed of light with the minimal Planck scale into a
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pp-Solar Neutrino Spectroscopy: Return of the Indium Detector
A new indium-loaded liquid scintillator (LS) with up to 15wt% In and high light output promises a breakthrough in the
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ROSAT/HRI and ASCA observations of the most luminous X-ray cluster RXJ1347.5-1145
We report on the X-ray properties of the exceptional X-ray cluster RXJ1347.5-1145 at z=0.451. We confirm that it is with
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Three Populous Clusters Discovered to be in the LMC Age Gap
In the process of searching the Hubble Space Telescope archive, we have serendipitously discovered three populous Large Magellanic Cloud (LMC)
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A Century of Gamma Ray Burst Models
More than 100 gamma-ray burst progenitor models have now been published in refereed journals. A list of the models published
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SMC: Stellar Populations through deep CMDs
We present deep color-magnitud diagrams (CMDs) reaching the oldest main-sequence turnoffs for 12 fields in the SMC. The {\it B}-band
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Dynamical streams in the solar neighbourhood
The true nature of the Hyades and Sirius superclusters is still an open question. In this contribution, we confront Eggen's
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Is the galactic disk older than the halo?
Aim of this study is to infer the age of the Galactic Disk by means of the ages of old
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Sub-mm Galaxies in Cosmological Simulations
We study the predicted sub-mm emission from massive galaxies in a Lambda-CDM universe, using hydrodynamic cosmological simulations. Assuming that most
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Globular Cluster Systems of Elliptical Galaxies
We review the observed properties of globular cluster systems and their implications for models of galaxy formation. Observations show that
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Formation and Disruption of Globular Star Clusters
In the first part of this article, we review observations of the mass and luminosity functions of young and old
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Randomly evolving trees III
The properties of randomly evolving special trees having defined and analyzed already in two earlier papers (arXiv:cond-mat/0205650 and arXiv:cond-mat/0211092) have
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Structure of the Galactic Halo towards the North Galactic Pole
We have used RR Lyrae and Blue HB stars as tracers of the old Galactic halo, in order to study
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The Host Galaxies of Radio-Loud and Radio-Quiet Quasars
I review our knowledge of the properties of the host galaxies of radio-loud and radio-quiet quasars, both in comparison to
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Deep Wide Field BVI CCD Photometry of the Sextans Dwarf Spheroidal Galaxy
We present deep wide field $VI$ CCD photometry of the Sextans dwarf spheroidal galaxy (dSph) in the Local Group, covering
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The stellar population of the Globular Cluster M 3. II: CCD photometry of additional 10,000 stars
We present BVI CCD photometry for more than 10,000 stars in the innermost region (0.3' < r <~ 4') of
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The Formation History of Globular Clusters
The properties of old globular cluster systems in galaxy halos are used to infer quantitative constraints on aspects of generic
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Global Electrophonic Fireball Survey: a review of witness reports - I
Despite more than 300 years since its first scientific description, the phenomenon of electrophonic sounds from meteors are still eluding
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