O
Ortwin Gerhard
Researcher at Max Planck Society
Publications - 463
Citations - 29734
Ortwin Gerhard is an academic researcher from Max Planck Society. The author has contributed to research in topics: Galaxy & Bulge. The author has an hindex of 90, co-authored 450 publications receiving 27269 citations. Previous affiliations of Ortwin Gerhard include University of Basel & ASTRON.
Papers
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The Origin of IRS 16: Dynamically Driven In-Spiral of a Dense Star Cluster to the Galactic Center?
TL;DR: In this paper, the authors use direct N-body simulations to study the in-spiral and internal evolution of dense star clusters near the Galactic center, and compare the spatial distribution and kinematics of the massive stars with observations of IRS 16, a group of young He I stars near the galactic center.
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The outer regions of the giant Virgo galaxy M87. Kinematic separation of stellar halo and intracluster light
TL;DR: In this paper, a spectroscopic study of 287 planetary Nebulas (PNs) in a total area of 0.4 deg 2 around the BCG M87 in Virgo A was performed.
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The outer regions of the giant Virgo galaxy M 87 Kinematic separation of stellar halo and intracluster light
TL;DR: In this article, a spectroscopic study of a sample of 287 planetary nebulas (PNs) around the brightest cluster galaxy (BCG) M 87 in Virgo A, of which 211 are located between 40 kpc and 150 kpc from the galaxy centre, is presented.
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Large-scale model of the milky way: stellar kinematics and the microlensing event timescale distribution in the galactic bulge
TL;DR: In this paper, a stellar-dynamical model of the Milky Way's barred bulge and disk is proposed, which matches the observed stellar kinematics in several bulge fields and its distribution of microlensing event timescales reproduces the observed timescale distribution of the MACHO experiment.
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A tale of two tails and an off-centered envelope: diffuse light around the cD galaxy NGC 3311 in the Hydra I cluster
Magda Arnaboldi,Magda Arnaboldi,G. Ventimiglia,Enrichetta Iodice,Ortwin Gerhard,Lodovico Coccato +5 more
TL;DR: In this article, the formation of intracluster light and extended halos around brightest cluster galaxies is closely related to morphological transformation, tidal stripping, and the disruption of galaxies in clusters.