M
Matthias Bartelmann
Researcher at Heidelberg University
Publications - 469
Citations - 31330
Matthias Bartelmann is an academic researcher from Heidelberg University. The author has contributed to research in topics: Galaxy cluster & Weak gravitational lensing. The author has an hindex of 77, co-authored 463 publications receiving 29828 citations. Previous affiliations of Matthias Bartelmann include ITA Software & University of Bonn.
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Do arcs require flat halo cusps
TL;DR: In this article, it was shown that steep density profiles are well in agreement with the cluster requiring the flattest axially symmetric profile once even small deviations from axial symmetry are introduced.
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Weak gravitational lensing with DEIMOS
TL;DR: In this article, a Gaussian deconvolution of the moments of the apparent brightness distribution of galaxies from the telescope's PSF is used for weak-lensing measurements, which is based on a mathematically exact decoder.
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Early structure formation in quintessence models and its implications for cosmic reionisation from first stars
U. Maio,Klaus Dolag,Massimo Meneghetti,L. Moscardini,Naoki Yoshida,C. Baccigalupi,Matthias Bartelmann,F. Perrotta +7 more
TL;DR: In this article, the authors present the first hydrodynamic N-body simulations of primordial gas clouds responsible for the reionisation process in dark energy cosmologies, and demonstrate that, in order to constrain the dark energy from large scale structures, one must track its effects down to the distribution of luminous matter.
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Mass distribution in the core of MACS J1206: robust modeling from an exceptionally large sample of central multiple images
G. B. Caminha,Claudio Grillo,Piero Rosati,Massimo Meneghetti,Amata Mercurio,Stefano Ettori,Italo Balestra,Andrea Biviano,Keiichi Umetsu,E. Vanzella,M. Annunziatella,M. Bonamigo,C. Delgado-Correal,Marisa Girardi,Marco Lombardi,Mario Nonino,Barbara Sartoris,Paolo Tozzi,Matthias Bartelmann,Larry Bradley,Karina Caputi,Dan Coe,Holland C. Ford,Raphael Gobat,Marc Postman,Stella Seitz,Adi Zitrin +26 more
TL;DR: In this article, a strong lensing analysis of the galaxy cluster MACS J1206.2-0847 (MACS 1206), at z=0.44, using deep spectroscopy from CLASH-VLT and VLT/MUSE archival data in combination with imaging from the Cluster Lensing and Supernova survey with Hubble, is presented.
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Combining weak and strong lensing in cluster potential reconstruction
TL;DR: In this article, a method for recovering the two-dimensional gravitational potential of galaxy clusters which combines data from weak and strong gravitational lensing is proposed, which can be fully linearised and does not rely on the existence and identification of multiple images.