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  • Hochschulschriften (Geologie) Serien
    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Oder geben Sie die ersten Buchstaben ein Sortierung aufsteigend absteigend Ergebnisse 5 10 20 40 60 80 100 Für diese Browse Ansicht gibt es keine Ergebnisse e docs Suche Im ganzen e docs In dieser Sammlung Erweiterte Suche Dokumente auflisten Gesamter Bestand Bereiche Sammlungen

    Original URL path: http://e-docs.geo-leo.de/handle/11858/518/browse?type=series (2016-02-15)
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  • Cold climate landforms on Mars
    and the southern hemispheric impact basins especially Hellas Planitia and which have been described controversially as either glacial or periglacial in nature Structures related to seasonal freeze thaw cycles on Mars which are generally known as thermal contraction polygons form a second major focus of this work Research presented on this topic focuses on the northern hemispheric Utopia Planitia area and the south polar cap of Mars This work was carried out on the basis of observational and geomorphometrical analyses by utilizing imaging sensor and topographic data in order to address questions regarding the history development and current state of cold climate landforms on Mars This work provides new insights with respect to age composition source of debris and ice and the deformational and degradational history of lobate debris aprons and similar landforms It is shown that processes which led to creep of debris and ice at the northern hemispheric dichotomy boundary are transitional in nature and are not easily categorized using standard definitions commonly used in terrestrial research en dc format mimetype application pdf en dc language iso deu en dc publisher Univ Berlin en dc rights uri http e docs geo leo de rights en dc subject gok

    Original URL path: http://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-30C9-2?show=full (2016-02-15)
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  • Hochschulschriften (Astronomie, Astrophysik, Weltraumforschung) Alle Dokumente nach Erscheinungsdatum
    of arrival directions is Heating of the corona in a 3D MHD forward model approach Bingert Sven Univ Freiburg Breisgau 2009 Observations of the solar corona show loop like structures formed by plasma at temperatures of one million degrees and higher Since the solar surface is much cooler than the corona a heating mechanism must be responsible Radiative transfer in the exosphere of Saturn s moon Titan Hedelt Pascal Univ Berlin 2009 This work focuses on the distribution of atomic hydrogen in the exosphere of Saturns moon Titan This work is based on measurements performed by the Hydrogen Deuterium Absorption Cell HDAC aboard the Cassini spacecraft Wechselwirkung des Mars mit dem Sonnenwind Hybrid Simulationen mit besonderem Bezug zur Wasserbilanz Bößwetter Alexander Univ Zugl Braunschweig 2009 Seit den 60er Jahren des letzten Jahrhunderts ist Mars immer wieder das Ziel von Raumfahrtmissionen gewesen um unter anderem nach Wasser auf unserem Nachbarplaneten zu suchen Nachdem die bisher analysierten Oberflächenmerkmale Zeeman Doppler Imaging of active late type stars Kopf Markus Univ Potsdam 2009 Stellar magnetic fields as a crucial component of star formation and evolution evade direct observation at least with current and near future instruments However investigating whether magnetic fields are generated by a Massive stars in the Galactic Center Quintuplet cluster Liermann Adriane Univ Potsdam 2009 The presented thesis describes the observations of the Galactic center Quintuplet cluster the spectral analysis of the cluster Wolf Rayet stars of the nitrogen sequence to determine their fundamental stellar parameters Multi telescope studies of neutron stars Lazaridis Kosmas Univ Köln 2009 Neutron stars are unique stellar remnants with extreme properties as their density and magnetic field Their study can be the key to a number of unanswered problems in fundamental physics and astronomy ranging from stellar Star disc encounters in young star clusters environmental effects on the evolution of protoplanetary discs Olczak Christoph Univ Köln 2009 According to current knowledge star formation occurs preferentially in clustered environments As a byproduct of the star formation process young stars are found to be surrounded by accretion discs that are potential birth Hydrogen deficient central stars of planetary nebulae Todt Helge Univ Potsdam 2009 Central stars of planetary nebulae are low mass stars on the brink of their final evolution towards white dwarfs Because of their surface temperature of above 25 000 K their UV radiation ionizes the surrounding material Supernova driven turbulence and magnetic field amplification in disk galaxies Gressel Oliver Univ Potsdam 2009 Supernovae are known to be the dominant energy source for driving turbulence in the interstellar medium Yet their effect on magnetic field amplification in spiral galaxies is still poorly understood Analytical models Characterization of the stellar variability in CoRoT fields with BEST telescopes Kabáth Petr Univ Berlin 2009 The first extrasolar planet 51 Peg b around the G type star has been reported in 1995 The planet with few Jupiter masses orbiting its star very closely was detected by measurement of the oscillation in the radial velocity Modeling light curves of type Ia

    Original URL path: http://e-docs.geo-leo.de/handle/11858/1489/browse?type=dateissued (2016-02-15)
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  • Hochschulschriften (Astronomie, Astrophysik, Weltraumforschung) Alle Dokumente nach Autor
    V W X Y Z Oder geben Sie die ersten Buchstaben ein Sortierung aufsteigend absteigend Ergebnisse 5 10 20 40 60 80 100 Anzeige der Dokumente 1 20 von 176 Nächste Seite Autorenname Actis Oxana Albers Nicole Andert Thomas Paul Arbeiter Carsten Aronica Giuseppe Agostino Bastian Thomas Beck Christian Bedorf Sven Holger Bennert Nicola Bertram Thomas Bhatt Megha Upendra Bingert Sven Böger Roger Borrmann Thorsten Bößwetter Alexander Bounama Christine Brandt

    Original URL path: http://e-docs.geo-leo.de/handle/11858/1489/browse?type=author (2016-02-15)
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  • Hochschulschriften (Astronomie, Astrophysik, Weltraumforschung) Alle Dokumente nach Kategorie
    Ergebnisse 5 10 20 40 60 80 100 Anzeige der Dokumente 1 20 von 123 Nächste Seite Kategorie Abspülung Geologie Aeronomie Meteorologie Akkretion extraterrestrischen Materials Geologie Asteroseismologie Oszillation Sterne Astrometrie Astrometrische und interferometrische Instrumente Astronomische Beobachtungen vom Weltraum aus Astronomische Beobachtungstechnik und Instrumente Atmosphäre Astronomie Venus Aufbau und Struktur von Sternsystemen Astronomie Äußere Atmosphäre insgesamt Meteorologie Bahnbestimmung von Himmelskörpern Astronomie Himmelsmechanik Bewegung von Sternen Astronomie Biographien Astronomie Wissenschaftsgeschichte Bodenständige UV

    Original URL path: http://e-docs.geo-leo.de/handle/11858/1489/browse?type=subject (2016-02-15)
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  • Hochschulschriften (Astronomie, Astrophysik, Weltraumforschung) Serien
    F G H I J K L M N O P Q R S T U V W X Y Z Oder geben Sie die ersten Buchstaben ein Sortierung aufsteigend absteigend Ergebnisse 5 10 20 40 60 80 100 Anzeige der Dokumente 1 1 von 1 Serie Scientific Technical Report Deutsches Geoforschungszentrum Potsdam GFZ 2009 Anzeige der Dokumente 1 1 von 1 e docs Suche Im ganzen e docs In

    Original URL path: http://e-docs.geo-leo.de/handle/11858/1489/browse?type=series (2016-02-15)
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  • Surface properties of asteroids from mid-infrared observations and thermophysical modeling
    characterization of asteroids with an emphasis on the thermal inertia of near Earth asteroids NEAs Thermal inertia governs the Yarkovsky effect a non gravitational force which significantly alters the orbits of asteroids up to 20 km in diameter Yarkovsky induced drift is important in the assessment of the impact hazard which NEAs pose to Earth Yet very little has previously been known about the thermal inertia of small asteroids including NEAs Observational and theoretical work is reported The thermal emission of asteroids has been observed in the mid infrared 5 35 æm wavelength range using the Spitzer Space Telescope and the 3 0 m NASA Infrared Telescope Facility IRTF techniques have been established to perform IRTF observations remotely from Berlin A detailed thermophysical model TPM has been developed and extensively tested this is the first detailed TPM shown to be applicable to NEA data en dc format mimetype application pdf en dc language iso eng en dc publisher Univ Berlin en dc rights uri http e docs geo leo de rights en dc subject gok TGG 900 en dc subject gok TGG 900 en dc title Surface properties of asteroids from mid infrared observations and thermophysical modeling en dc type

    Original URL path: http://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-30CB-D?show=full (2016-02-15)
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  • Hydrogen-deficient central stars of planetary nebulae
    description abstract Central stars of planetary nebulae are low mass stars on the brink of their final evolution towards white dwarfs Because of their surface temperature of above 25 000 K their UV radiation ionizes the surrounding material which was ejected in an earlier phase of their evolution Such fluorescent circumstellar gas is called a Planetary Nebula 34 About one tenth of the Galactic central stars are hydrogen deficient Generally the surface of these central stars is a mixture of helium carbon and oxygen resulting from partial helium burning Moreover most of them have a strong stellar wind similar to massive Pop I Wolf Rayet stars and are in analogy classified as WC The brackets distinguish the special type from the massive WC stars en dc format extent 102 S en dc format mimetype application pdf en dc language iso eng en dc publisher Univ Potsdam en dc rights uri http e docs geo leo de rights en dc subject gok TEG 000 en dc title Hydrogen deficient central stars of planetary nebulae en dc type doctoralThesis en dc subject gokverbal Kosmogonie Astronomie de dc identifier ppn 620379332 en dc identifier urn urn nbn de kobv 517 opus 41047 en

    Original URL path: http://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-308D-8?show=full (2016-02-15)
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