R. - D. Scholz

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To provide a close-to-reality simulation model, such as for improved surgery planning, this model has to be experimentally verified. The present article describes the use of a 3D laser vibrometer for determining modal parameters of human pelvic bones that can be used for verifying a finite elements model. Compared to previously used sensors, such as(More)
We present results of a study of the galactic open cluster population based on the all-sky catalogue ASCC-2.5 (I/280A) compiled from Tycho-2, Hipparcos and other catalogues. The sample of optical clusters from ASCC-2.5 is complete up to about 850 pc from the Sun. The symmetry plane of the clusters' distribution is determined to be at Z 0 = −22 ± 4 pc, and(More)
The expected performance of the small astrometric interferometer satellite DIVA is investigated. Using simulated detector signals, we discuss the dependence of the achievable precision in astrometry and pho-tometry on various technological and mission-speciic parameters. Such considerations, which are analogously applicable to other mission concepts (like(More)
We present preliminary astrometric results for the closest known brown dwarf binary to the Sun: ε Indi Ba, Bb at a distance of 3.626 pc. Via ongoing monitoring of the relative separation of the two brown dwarfs (spectral types T1 and T6) with the VLT NACO near-IR adaptive optics system since June 2004, we obtain a model-independent dynamical total mass for(More)
Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. ABSTRACT We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic(More)
We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity, surface gravity, and rota-tional velocity) of up to one million stars using the 6dF multi-object spectro-graph on the 1.2-m UK Schmidt Telescope of the(More)
We present a list of 130 Galactic Open Clusters, found in the All-Sky Compiled Catalogue of 2.5 Million Stars (ASCC-2.5). For these clusters we determined and publish a homogeneous set of astrophysical parameters such as size, membership , motion, distance and age. In a previous work 520 already known open clusters out of the sample of 1700 clusters from(More)
Context. For Galactic open clusters fundamental parameters like age or reddening are usually determined independently of their integrated colours. For extragalactic clusters, on the other hand, they are essentially derived via a comparison of their integrated colours with predictions of simple stellar population (SSP) models. Aims. We have found a(More)
We present the results of spectroscopic follow-up observations for a sample of 71 red objects with high proper motions in the range 0.08–1.14 arcsec/yr as detected using APM and SSS measurements of multi-epoch photographic Schmidt plates. Red objects were selected by combining the photographic B J RI magnitudes with 2MASS near-infrared JHK s magnitudes.(More)
We present the discovery of a new extreme high proper motion object (∼3.5 arcsec/year) which we classify as an ultracool subdwarf with [M/H] ∼ −0.5. It has a formal spectral type of sdM9 but also shows L-type features: while the VO bands are completely absent, it exhibits extremely strong TiO absorption in its optical spectrum. With a radial velocity of(More)