Download e-book for kindle: Status and Prospects of Astronomy in Germany 2003-2016: by Günther Hasinger

By Günther Hasinger

ISBN-10: 3527319107

ISBN-13: 9783527319107

This white paper identifies the most matters and significant strategies for German astronomical examine. Their implementation would require initiative from all companions and should enable German astronomers and astrophysicists to continually play a number one position of their box.

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Additional resources for Status and Prospects of Astronomy in Germany 2003-2016: Memorandum (Denkschrift (DFG))

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Direct observations of this first stellar generation represent one of the most interesting challenges of observational cosmology and one of the primary objectives of the JWST. 4 The large-scale structure of the universe It is regarded as a fundamental truth that galaxies are not uniformly distributed around the universe. Rather, they collect together in the densest regions to form groups, galaxy clusters and superclusters. They have elongated or flat structures, which in turn enclose holes – regions of very low galaxy density – giving the distribution of galaxies in the universe a “bubble-like” structure when viewed on a scale of up to a billion light years.

The smallest recognisable structures in the sky were about 7° wide. Copious amounts of information on the structure of the universe at an age of 380,000 years are hidden in the cosmic background radiation at angular scales between around one degree and several arc minutes. New and more powerful experiments will therefore measure these fluctuations with vastly improved angular resolutions and greater sensitivity. 1). A preview of the spectacular results expected was given by the microwave mapping of small regions of the sky with improved angular resolution, by the balloon-based instruments BOOMERanG and MAXIMA in 2000, and by the recently published WMAP map.

Quasars with a redshift of around 6 have been spectroscopically investigated using the VLT; they emitted their light at a time when the universe was only 5% of its present age! 1 The universe – its origin, evolution and large-scale structure Fig. 6: Tomography of the intergalactic medium along the line of sight to the quasar HS 1700+6416. The strength of the numerous absorption lines in this UV spectrum captured by the HST (the horizontal axis represents the wavelength in Ångströms) provides detailed information on the element abundance and the physical conditions in the thinly distributed gas in the foreground of the quasar.

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Status and Prospects of Astronomy in Germany 2003-2016: Memorandum (Denkschrift (DFG)) by Günther Hasinger


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