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X-Ray Candidates for a Population of Nuclear Cores in Local Group Galaxies
Because of their closeness, the galaxies of the Local Group are an interesting sample for finding weak manifestations of nuclear activity (as is... -
Evidence of a Supernova Origin for the Black Hole in GRO J1655-40 (Nova Scorpii 1994)
We report the discovery of a strong overabundance of several $\alpha$... -
Synergy Between the VLT and the NGST
Three major astronomical facilities will address the distant universe and processes of star formation in the next decade: the Next Generation Space... -
The Cluster Population in a Complete Sample of Optically Identified RASS X-Ray Sources
Using the 2.1-m telescope of the Guillermo Haro Observatory (Cananea, Mexico) the optical counterparts of a count-rate and area limited complete... -
Massive Stars and Their Role in Spectra and Abundances of High Redshift Galaxies
There are great changes in our understanding of massive star evolution. Although it is a known fact that the populations of massive stars (O-stars,... -
Planetary Microlensing: Present Status and Long-Term Goals
Massive gravitational microlensing programs were begun about a decade ago as a means to search for compact baryonic dark matter in the Galaxy [1],... -
Extrasolar Planets Transits: Detection and Follow-Up
The detection of transits has a rich potential of information about extrasolar planets. This contribution gives an overview and new perspectives on... -
Solar Nebulae and Replenished Dust Disks with Planets
Having studied the primordial, protoplanetary gas disks, and older, dusty “remnant” disks in infrared-emitting (Vega-type) circumstellar systems, we... -
The Darwin Space Interferometer
Darwin is a mid-IR(5-30 micron) interferometry observatory with baselines greater than 50 metres. As a long-duration general purpose observatory, ESA... -
Observations of Cygnus X-3 in Quiescence in the $2.4 - 12 \mu$ m Range with ISO
We present mid-infrared spectrophotometric and imaging photometric results obtained with ISO on the peculiar X-ray binary Cygnus X-3. The... -
Effects of Anisotropy on the Central Dark Mass in NGC 3115. New Results from Integral Field Spectroscopy
We report new results on the stellar kinematics and the mass distribution of the galaxy NGC 3115 based on NIR integral field spectroscopic data.... -
SINFONI - Galaxy Dynamics at $0^{\prime\prime}\hspace{-0.2cm}.05$ Resolution with the VLT
The SINFONI integral field spectrometer for the VLT will provide nearinfrared spatially resolved spectra at spatial resolutions close to the... -
Simultaneous Infrared and mm- Wave Observations of Disc Ejection Events in GRS 1915+105
We have observed in the Galactic X-ray source GRS 1915+105 some of the brightest 20-min quasi-periodic oscillations yet seen, simultaneously at... -
Molecular Gas in Nuclei of the Seyfert Galaxies NGC3227 and NGC1068
New subarcsecond data on NGC 3227 and NGC 1068 obtained with the Plateau de Bure millimeter interferometry indicate large enclosed masses and the... -
X-Ray Spectra of Neutron Stars vs. Black Holes
This paper gives an overview of the observed X-ray spectra of lowmass X-ray binaries containing a weakly-magnetized neutron star (NS-LMXRB) and those... -
Gravitational Lens Diagnosis of Quasar Accretion Disk
We present simulated microlensing light curves of a quasar accretion disk using two canonical accretion disk models. Furthermore, we investigate the... -
Galaxy Masses: Disks and Their Halos
I review what we currently do and do not know about the masses of disk galaxies and their dark matter halos. The prognosis for disks is good: the... -
Luminosities of Radio-Loud Active Galaxies
We investigate the host galaxy luminosities of three different samples of radio loud active nuclei at z<0.5 including BL Lac Objects (BLLs), Radio... -
Probing the Evolution of Massive Galaxies with the K20 Survey
The motivations and the status of the K20 survey are presented. The first results on the evolution of massive galaxies and the comparison with the... -
The Evolution of Galaxy Mass in Hierarchical Models
Advances in extragalactic astronomy have prompted the development of increasingly realistic models which aim to describe the formation and evolution...