Home Page for Jesper Storm

/^\ Postal address:
Dr. Jesper Storm
Leibniz-Institut fur Astrophysik Potsdam (AIP)
An der Sternwarte 16 
D - 14482 Potsdam

e-mail: jstorm@aip.de
Tel: +49-(0)-331-7499-394 FAX: +49-(0)-331-7499-267

Curriculum Vitae

A summary Curriculum Vitae

Scientific Publications:

My list of publications is also available as pdf-file (85kb).

Scientific interests:

Baade-Wesselink analysis of RR Lyrae stars and Cepheids for use as calibrators of the extra-galactic distance scale. Although the Space Telescope can observe Cepheids in distant galaxies the distances derived to these galaxies still depends critically on the local calibration of the Period-Luminosity relation where there are still uncertainties at the 10-20% level.
Distances and physical properties of eclipsing binaries in the Magellanic Clouds. The goal is to provide an independent distance measure the the Magellanic Clouds to resolve the pending disagreement between distance derived from RR Lyrae stars and Cepheids.
The RR Lyrae K-band period luminosity relation. As is the case for Cepheids, RR Lyrae stars also follow a very well defined period luminosity relation in the near infrared K-band. Potentially this relation provides a significantly more reliable distance indicator than the traditional Mv-[Fe/H] relation. In a collaboration with theorists and experimentalists in Italy, I am investigating this relation and applying it to RR Lyrae stars in a number of galactic globular clusters spanning a wide range in metallicity. If everything goes as expected we can then apply the method to RR Lyrae stars in other galaxies providing strong constraints on the Cepheid distance scale.
Baade-Wesselink analysis of Cepheids in clusters in the LMC. In collaboration with Wolfgang Gieren (Univ. de Concepcion, Chile), Pascal Fouque (Observatoire Midi-Pyrenees, Toulouse) and others I am studying Cepheids in clusters with a large population of Cepheids. In this way we can determine the intrinsic precision of the method and determine direct distances to these clusters and thereby to the LMC which provides the first and most crucial step on the distance ladder.
My interest in better defining the extragalactic distance scale is also being stimulated by being a Co-I on the ARAUCARIA project. In this project we try to compare a number of important extragalactic standard candles in other galaxies to better understand their strengths and weaknesses and thus to improve the calibrations. There is an interesting ESO press release available here discussing some of the results which we have found for NGC300.
Work in progress Drafts and stuff for my collaborators.

Technical interests:

The Large Binocular Telescope (LBT). The AIP is a partner in this new telescope project which has been built on Mt. Graham in Arizona, USA. It consists of two 8.4m mirrors mounted in the same fork.
The guiding and wavefront sensing system for the LBT, which is the in-kind contribution of the AIP to the project.
The tip-tilt sensing system for the ARGOS laser guide star system for the LBT. This system will help the telescope to use the adaptive optics capability all over the sky and to produce images over large fields of view with much sharper images than the atmosphere delivers to the telescope.
Click for Berlin Tegel, Germany Forecast Click for Safford, Arizona Forecast
Pictures from the soccer match after the Concepcion, Dec. 2002 Workshop on "Stellar Candles for the Extragalactic Distance Scale".
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