Ortwin Gerhard

19.5k total citations · 1 hit paper
207 papers, 9.8k citations indexed

About

Ortwin Gerhard is a scholar working on Astronomy and Astrophysics, Instrumentation and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Ortwin Gerhard has authored 207 papers receiving a total of 9.8k indexed citations (citations by other indexed papers that have themselves been cited), including 198 papers in Astronomy and Astrophysics, 121 papers in Instrumentation and 10 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Ortwin Gerhard's work include Stellar, planetary, and galactic studies (162 papers), Galaxies: Formation, Evolution, Phenomena (128 papers) and Astronomy and Astrophysical Research (121 papers). Ortwin Gerhard is often cited by papers focused on Stellar, planetary, and galactic studies (162 papers), Galaxies: Formation, Evolution, Phenomena (128 papers) and Astronomy and Astrophysical Research (121 papers). Ortwin Gerhard collaborates with scholars based in Germany, United States and Italy. Ortwin Gerhard's co-authors include Joss Bland‐Hawthorn, Christopher Wegg, M. Arnaboldi, Matthieu Portail, R. P. Saglia, R. Bender, K. C. Freeman, James Binney, Nicolai Bissantz and L. Coccato and has published in prestigious journals such as Physical Review Letters, The Astrophysical Journal and Monthly Notices of the Royal Astronomical Society.

In The Last Decade

Ortwin Gerhard

198 papers receiving 9.4k citations

Hit Papers

The Galaxy in Context: Structural, Kinematic, and Integra... 2016 2026 2019 2022 2016 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. The Galaxy in Context: Structural, Kinematic, and Integrated Properties
    2016 973 citations Joss Bland‐Hawthorn, Ortwin Gerhard profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ortwin Gerhard Germany 54 9.6k 4.4k 896 433 359 207 9.8k
Dennis Zaritsky United States 48 8.6k 0.9× 4.2k 0.9× 1.3k 1.5× 320 0.7× 316 0.9× 227 8.9k
E. K. Grebel Germany 55 10.2k 1.1× 4.7k 1.1× 848 0.9× 210 0.5× 187 0.5× 291 10.3k
Barry F. Madore United States 50 9.6k 1.0× 3.2k 0.7× 1.4k 1.5× 396 0.9× 213 0.6× 234 10.0k
Roeland P. van der Marel United States 53 9.2k 1.0× 4.2k 1.0× 855 1.0× 572 1.3× 206 0.6× 187 9.4k
Thorsten Naab Germany 56 10.2k 1.1× 4.6k 1.0× 1.2k 1.4× 425 1.0× 349 1.0× 177 10.5k
Geraint F. Lewis Australia 51 9.6k 1.0× 4.2k 0.9× 1.2k 1.4× 371 0.9× 227 0.6× 335 9.9k
Carl J. Grillmair United States 39 8.7k 0.9× 3.2k 0.7× 1.2k 1.3× 384 0.9× 206 0.6× 111 8.9k
A. Bressan Italy 50 15.4k 1.6× 7.3k 1.6× 904 1.0× 421 1.0× 157 0.4× 229 15.7k
Brant Robertson United States 55 8.8k 0.9× 4.0k 0.9× 1.4k 1.5× 360 0.8× 188 0.5× 100 9.2k
Julien Devriendt United Kingdom 46 7.0k 0.7× 3.0k 0.7× 1.3k 1.5× 277 0.6× 226 0.6× 182 7.3k

Countries citing papers authored by Ortwin Gerhard

Since Specialization
Citations

This map shows the geographic impact of Ortwin Gerhard's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ortwin Gerhard with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ortwin Gerhard more than expected).

Fields of papers citing papers by Ortwin Gerhard

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ortwin Gerhard. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ortwin Gerhard. The network helps show where Ortwin Gerhard may publish in the future.

Co-authorship network of co-authors of Ortwin Gerhard

This figure shows the co-authorship network connecting the top 25 collaborators of Ortwin Gerhard. A scholar is included among the top collaborators of Ortwin Gerhard based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ortwin Gerhard. Ortwin Gerhard is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Sormani, Mattia C., Eugene Vasiliev, Simon C. O. Glover, et al.. (2024). Testing kinematic distances under a realistic Galactic potential. Astronomy and Astrophysics. 692. A216–A216. 12 indexed citations
2.
Sormani, Mattia C., Jason L. Sanders, T. K. Fritz, et al.. (2022). Self-consistent modelling of the Milky Way's nuclear stellar disc. IrInSubria (University of Insubria). 55 indexed citations
3.
Bhattacharya, Souradeep, M. Arnaboldi, Ortwin Gerhard, et al.. (2022). The Andromeda Galaxy’s Last Major Merger: Constraints from the survey of Planetary Nebulae. Proceedings of the International Astronomical Union. 18(S377). 123–126.
4.
Gerhard, Ortwin, et al.. (2021). A2A: 21 000 bulge stars from the ARGOS survey with stellar parameters on the APOGEE scale. Springer Link (Chiba Institute of Technology). 12 indexed citations
5.
Pulsoni, C., Ortwin Gerhard, M. Arnaboldi, et al.. (2020). The stellar halos of ETGs in the IllustrisTNG simulations: The photometric and kinematic diversity of galaxies at large radii. Springer Link (Chiba Institute of Technology). 46 indexed citations
6.
Laporte, Chervin F. P., Benoît Famaey, G. Monari, et al.. (2020). Bar resonances and low angular momentum moving groups in the Galaxy revealed by their stellar ages. Springer Link (Chiba Institute of Technology). 14 indexed citations
7.
Bhattacharya, Souradeep, M. Arnaboldi, Ortwin Gerhard, et al.. (2019). The survey of planetary nebulae in Andromeda (M 31). arXiv (Cornell University). 22 indexed citations
8.
Arnaboldi, M., et al.. (2019). The survey of planetary nebulae in Andromeda (M 31). Springer Link (Chiba Institute of Technology). 33 indexed citations
9.
Opitsch, M., et al.. (2018). Evidence for non-axisymmetry in M 31 from wide-fieldkinematics of stars and gas. Springer Link (Chiba Institute of Technology). 5 indexed citations
10.
Saglia, R. P., et al.. (2018). Stellar populations of the central region of M 31. Springer Link (Chiba Institute of Technology). 22 indexed citations
11.
Longobardi, A., et al.. (2018). Kinematics of the outer halo of M 87 as mapped by planetary nebulae. Springer Link (Chiba Institute of Technology). 23 indexed citations
12.
Hartke, Johanna, M. Arnaboldi, Ortwin Gerhard, et al.. (2018). Three dynamically distinct stellar populations in the halo of M49. Springer Link (Chiba Institute of Technology). 21 indexed citations
13.
Hartke, Johanna, M. Arnaboldi, A. Longobardi, et al.. (2017). The halo of M 49 and its environment as traced by planetary nebulae populations. Springer Link (Chiba Institute of Technology). 20 indexed citations
14.
Longobardi, A., M. Arnaboldi, Ortwin Gerhard, & R. W. Hanuschik. (2015). The outer regions of the giant Virgo galaxy M 87 Kinematic separation of stellar halo and intracluster light. Springer Link (Chiba Institute of Technology). 42 indexed citations
15.
Cortesi, A., M. Arnaboldi, L. Coccato, et al.. (2013). The Planetary Nebula Spectrograph survey of S0 galaxy kinematics. Springer Link (Chiba Institute of Technology). 23 indexed citations
16.
Arnaboldi, M., et al.. (2011). The unmixed kinematics and origins of diffuse stellar light in the core of the Hydra I cluster (Abell 1060). Springer Link (Chiba Institute of Technology). 23 indexed citations
17.
Arnaboldi, M., et al.. (2010). Counter-dispersed slitless-spectroscopy technique:planetary nebula velocities in the halo of NGC 1399. Springer Link (Chiba Institute of Technology). 20 indexed citations
18.
Doherty, Michelle, M. Arnaboldi, Payel Das, et al.. (2009). The edge of the M 87 halo and the kinematics of the diffuse light in the Virgo cluster core. Springer Link (Chiba Institute of Technology). 44 indexed citations
19.
López‐Corredoira, M., A. Cabrera‐Lavers, & Ortwin Gerhard. (2005). A boxy bulge in the Milky Way. Inversion of the stellarstatistics equation with 2MASS data. Springer Link (Chiba Institute of Technology). 57 indexed citations
20.
Samland, M., et al.. (2003). Gas physics, disk fragmentation, and bulge formation in young galaxies. Springer Link (Chiba Institute of Technology). 111 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Dennis Zaritsky Breakdown of academic impact, for papers by E. K. Grebel Breakdown of academic impact, for papers by Barry F. Madore Breakdown of academic impact, for papers by Roeland P. van der Marel Breakdown of academic impact, for papers by Thorsten Naab Breakdown of academic impact, for papers by Geraint F. Lewis Breakdown of academic impact, for papers by Carl J. Grillmair Breakdown of academic impact, for papers by A. Bressan Breakdown of academic impact, for papers by Brant Robertson Breakdown of academic impact, for papers by Julien Devriendt
Rankless by CCL
2026