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Event Category: MondaySeminar

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Speaker: Laila Linke Title: Studying the Galaxy-Galaxy-Matter Distribution in the Universe Abstract: Understanding the interplay between dark and baryonic matter is one of the most crucial issues of cosmology and extragalactic astronomy. For this goal, we measure the correlation between the number density of galaxy pairs and their surrounding dark matter in combined data from the […]

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Speaker: Hannah Zohren Title: Galaxy Clusters – Optical Confirmation and Weak Lensing Mass Constraints Abstract: Samples of galaxy clusters provide a versatile basis for studies of the cosmological parameters that govern the Universe. They are assembled based on observable properties of the clusters. Detections based on the Sunyaev Zel’dovich (SZ) effect build the basis for surveys […]

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Speaker: Laure Bouscasse Title: Chemical differentiation in high-mass protostellar objects Abstract: The physical conditions in massive dense cores (MDCs) leading to high-mass star formation are poorly constrained. From the 870 mm ATLASGAL survey of the inner Galaxy, in the frame of the SPARKS project (Survey for high-mass Protostars with ALMA Revealed up to Kpc Scales, PI: […]

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Speaker: Tilemachos Athanasiadis Title: A targeted survey for pulsars orbiting high proper motion GAIA white dwarfs Abstract: The GAIA satellite is a revolutionary astrometric mission that monitors the positions of 1.5 billion sources in the Milky Way. Among these stars are hundreds of white dwarfs with likely pulsar companions, that can now be singled-out based on […]

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Speaker: Sandra Unruh Title: Shear-ratio tests and magnification bias (in weak gravitational lensing) Abstract: Using the same lens galaxies, the ratios of tangential shears for different source galaxy redshifts is equal to the ratios of their corresponding angular-diameter distances. This is the so-called shear-ratio test (SRT) and it is valid when effects induced by the intervening […]