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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Journal ArticleDOI
Is Galactic Structure Compatible with Microlensing Data
TL;DR: In this paper, the authors generalize to elliptical models the argument of Kuijken (1997), which connects the microlensing optical depth towards the Galactic bulge to the Galactic rotation curve.
Journal ArticleDOI
The Hercules stream as seen by APOGEE-2 South
Jason A. S. Hunt,Jo Bovy,Angeles Pérez-Villegas,Jon A. Holtzman,Jennifer Sobeck,Drew Chojnowski,Felipe A. Santana,Pedro A. Palicio,Pedro A. Palicio,Christopher Wegg,Ortwin Gerhard,Andres Almeida,Dmitry Bizyaev,Dmitry Bizyaev,José G. Fernández-Trincado,José G. Fernández-Trincado,Rebecca Lane,Penélope Longa-Peña,Steven R. Majewski,Kaike Pan,Alexandre Roman-Lopes +20 more
TL;DR: Alfred P.Dunlap Fellowship at the Dunlap Institute for Astronomy Astrophysics as discussed by the authors, University of Toronto, Canada and Natural Sciences and Engineering Research Council of Canada.
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The dynamically hot stellar halo around NGC 3311: a small cluster-dominated central galaxy ,
TL;DR: In this paper, an on-going project with the aim to characterize the dynamical state in the core of the Hydra I (Abell 1060) cluster around NGC 3311 is reported.
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Candidates for Intracluster Planetary Nebulae in the Virgo Cluster based on the Suprime-Cam Narrow-Band Imaging in O[III] and Halpha
S. Okamura,Naoki Yasuda,M. Arnaboldi,Kenneth C. Freeman,Hiroyasu Ando,Masao Doi,Hisanori Furusawa,Ortwin Gerhard,Masaru Hamabe,Masashi Kimura,Toshitaka Kajino,Yutaka Komiyama,S. Miyazaki,Fumiaki Nakata,Nicola R. Napolitano,Masami Ouchi,Maurilio Pannella,Masaki Sekiguchi,K. Shimasaku,M. Yagi +19 more
TL;DR: In this article, the authors identified 38 candidates of intracluster planetary nebulae (ICPNe) in a $34'times27'$ field in the core of the Virgo cluster based on the Suprime-Cam imaging through two narrow-band filters centered at the redshifted wavelengths of the [OIII]$\lambda=5007\AA$ and the Halpha \lambda=6563\AA lines.
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From rings to bulges: evidence for rapid secular galaxy evolution at z~2 from integral field spectroscopy in the SINS survey
Reinhard Genzel,Andreas Burkert,Nicolas Bouché,Giovanni Cresci,N. M. Foerster Schreiber,Alice E. Shapley,Kristen L. Shapiro,Linda J. Tacconi,P. Buschkamp,Andrea Cimatti,Emanuele Daddi,Ric Davies,Frank Eisenhauer,Dawn K. Erb,Shy Genel,Ortwin Gerhard,Erin K. S. Hicks,Dieter Lutz,Thorsten Naab,Thomas Ott,Sebastian Rabien,Alvio Renzini,Charles C. Steidel,Amiel Sternberg,Simon J. Lilly +24 more
TL;DR: Ha integral field spectroscopy of well resolved, UV/optically selected z~2 star-forming galaxies as part of the SINS survey with SINFONI on the ESO VLT is presented in this paper.