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The Effelsberg-Bonn HI Survey: Milky Way data

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arxiv 1007.3363 v1 pith:4LGY3SQF submitted 2010-07-20 astro-ph.GA

The Effelsberg-Bonn HI Survey: Milky Way data

classification astro-ph.GA
keywords milkysurveydataebhiseffelsberg-bonnnorthernaccretingangular
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Since autumn 2008 an L-band 7-Feed-Array is operated for astronomical science at the 100-m radio telescope at Effelsberg. This receiver is used to perform an unbiased, fully sampled HI survey of the whole northern hemisphere observing both the galactic and extragalactic sky in parallel - the Effelsberg-Bonn HI survey (EBHIS). We present first results based on the Milky Way data. Up to now two larger coherent regions were mapped each covering about 2000 square degrees. One of these fields covers the northern part of the high-velocity cloud complex GCN. With the better angular resolution of the EBHIS we resolve the previously detected clouds into isolated compact clumps and find a linewidth-radial velocity relation giving hints on an interaction of accreting material with the Milky Way halo.

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