This map shows the geographic impact of A. Witzel'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 A. Witzel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Witzel more than expected).
This network shows the impact of papers produced by A. Witzel. 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 A. Witzel. The network helps show where A. Witzel may publish in the future.
Co-authorship network of co-authors of A. Witzel
This figure shows the co-authorship network connecting the top 25 collaborators of A. Witzel.
A scholar is included among the top collaborators of A. Witzel 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 A. Witzel. A. Witzel 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.
Simone, M. De, C. Codella, C. Ceccarelli, et al.. (2020). Seeds of Life in Space (SOLIS). Astronomy and Astrophysics. 640. A75–A75.23 indexed citations
Krichbaum, T. P., U. Bach, D. A. Graham, et al.. (2009). Towards mm-VLBI. 1–1.
4.
Krichbaum, T. P., U. Bach, D. A. Graham, et al.. (2008). Towards mm-VLBI. 9. 1.
5.
Britzen, S., A. Witzel, E. Ros, et al.. (2006). The kinematics of 1803+784. 7.1 indexed citations
6.
Krichbaum, T. P., J. A. Zensus, & A. Witzel. (2005). Radio interferometric observations of AGN - Probing the nucleus of M 87 with 20 Schwarzschild radii resolution.. 326. 548–549.1 indexed citations
7.
Krichbaum, T. P., D. A. Graham, A. Greve, et al.. (1997). 215 GHz VLBI observations of bright Active Galactic Nuclei.. 323(1).2 indexed citations
8.
Greve, A., M. A. P. Torres, J. E. Wink, et al.. (1995). 215 GHz VLBI observations: Detection of fringes on the 1147 KM baseline Pico Veleta-Plateau de Bure. Data Archiving and Networked Services (DANS). 299.1 indexed citations
9.
Steffen, W., J. A. Zensus, T. P. Krichbaum, A. Witzel, & S. J. Qian. (1995). A helical model for the compact jet in 3c345. CERN Bulletin. 302(2). 335.6 indexed citations
10.
Schalinski, C. J., A. Witzel, T. P. Krichbaum, et al.. (1994). MM Observations of Active Galactic Nuclei with a High Sensitivity VLB-Array. 45.2 indexed citations
11.
Witzel, A., et al.. (1994). An updated list of radio flux density calibrators. Max Planck Institute for Plasma Physics. 284(1). 331–339.43 indexed citations
12.
Krichbaum, T. P., A. Witzel, D. A. Graham, C. J. Schalinski, & J. A. Zensus. (1993). New results from VLBI at 43 GHz. 181.2 indexed citations
13.
Witzel, A., et al.. (1993). Intraday variability in the BL Lac object 0954+658.. 271(1). 344–347.9 indexed citations
14.
Witzel, A., C. J. Schalinski, Ken Johnston, et al.. (1988). The occurrence of bulk relativistic motion in compact radio sources.. 206. 245–252.11 indexed citations
15.
Pauliny‐Toth, I. I. K., et al.. (1984). A deep survey of the 5C2 area at 4850 MHz.. 139(1). 85–92.1 indexed citations
Huchtmeier, W. K. & A. Witzel. (1979). Extended envelope of neutral hydrogen around M101.. 74. 138–145.3 indexed citations
18.
Preuß, E., K. I. Kellermann, I. I. K. Pauliny‐Toth, A. Witzel, & D. B. Shaffer. (1979). Structural changes in the nucleus of NGC 1275 at 2.8 cm wavelength.. 79(3). 268–273.3 indexed citations
19.
Pauliny‐Toth, I. I. K., et al.. (1977). Observations of Ganymede and Callisto at 1.3 cm wavelength.. A&A. 58(3).3 indexed citations
20.
Pauliny‐Toth, I. I. K., et al.. (1974). The Brightness Temperatures of Ganymede and Callisto at 2.8 CM Wavelength. A&A. 34. 129.4 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.