A. Hempelmann

997 total citations
51 papers, 651 citations indexed

About

A. Hempelmann is a scholar working on Astronomy and Astrophysics, Instrumentation and Computational Mechanics. According to data from OpenAlex, A. Hempelmann has authored 51 papers receiving a total of 651 indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Astronomy and Astrophysics, 15 papers in Instrumentation and 11 papers in Computational Mechanics. Recurrent topics in A. Hempelmann's work include Stellar, planetary, and galactic studies (30 papers), Astronomy and Astrophysical Research (15 papers) and Solar and Space Plasma Dynamics (14 papers). A. Hempelmann is often cited by papers focused on Stellar, planetary, and galactic studies (30 papers), Astronomy and Astrophysical Research (15 papers) and Solar and Space Plasma Dynamics (14 papers). A. Hempelmann collaborates with scholars based in Germany, Mexico and Belgium. A. Hempelmann's co-authors include J. H. M. M. Schmitt, M. Mittag, J. N. González‐Pérez, K.‐P. Schröder, C. O. Weiß, G. Rauw, Uwe Wolter, W. Weber, S. L. Baliunas and P. Eenens and has published in prestigious journals such as Nature Communications, The Astrophysical Journal and Journal of Virology.

In The Last Decade

A. Hempelmann

48 papers receiving 598 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
A. Hempelmann Germany 17 458 125 77 69 39 51 651
J. Dupuis United States 19 951 2.1× 245 2.0× 108 1.4× 59 0.9× 20 0.5× 70 1.4k
M. Keane United States 11 579 1.3× 211 1.7× 32 0.4× 44 0.6× 10 0.3× 29 714
Brendon J. Brewer New Zealand 20 920 2.0× 341 2.7× 47 0.6× 7 0.1× 26 0.7× 40 1.1k
B. Garćıa Argentina 12 311 0.7× 85 0.7× 11 0.1× 26 0.4× 32 0.8× 79 550
S. A. Bell United Kingdom 18 529 1.2× 129 1.0× 11 0.1× 33 0.5× 33 0.8× 57 983
Matthew J. Penn United States 16 752 1.6× 13 0.1× 191 2.5× 61 0.9× 24 0.6× 57 867
H. J. Smith United States 12 333 0.7× 29 0.2× 24 0.3× 28 0.4× 18 0.5× 66 522
Qiusheng Gu China 19 1.2k 2.6× 441 3.5× 58 0.8× 21 0.3× 33 0.8× 127 1.3k
J. Olivares Spain 17 551 1.2× 158 1.3× 20 0.3× 28 0.4× 4 0.1× 42 791
Soojong Pak South Korea 14 607 1.3× 154 1.2× 10 0.1× 49 0.7× 11 0.3× 83 752

Countries citing papers authored by A. Hempelmann

Since Specialization
Citations

This map shows the geographic impact of A. Hempelmann'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. Hempelmann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Hempelmann more than expected).

Fields of papers citing papers by A. Hempelmann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. Hempelmann. 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. Hempelmann. The network helps show where A. Hempelmann may publish in the future.

Co-authorship network of co-authors of A. Hempelmann

This figure shows the co-authorship network connecting the top 25 collaborators of A. Hempelmann. A scholar is included among the top collaborators of A. Hempelmann 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. Hempelmann. A. Hempelmann 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.
Hempelmann, A., Maximilian Kittel, Sonal Asthana, et al.. (2022). Rapid, adaptable and sensitive Cas13-based COVID-19 diagnostics using ADESSO. Nature Communications. 13(1). 3308–3308. 53 indexed citations
2.
Hempelmann, A., Monique van Straaten, Johan Zeelen, et al.. (2021). Nanobody-mediated macromolecular crowding induces membrane fission and remodeling in the African trypanosome. Cell Reports. 37(5). 109923–109923. 11 indexed citations
3.
Zeelen, Johan, Monique van Straaten, A. Hempelmann, et al.. (2021). Structure of trypanosome coat protein VSGsur and function in suramin resistance. Nature Microbiology. 6(3). 392–400. 22 indexed citations
4.
Mittag, M., J. H. M. M. Schmitt, Τ. S. Metcalfe, A. Hempelmann, & K.‐P. Schröder. (2019). Magnetic activity of the solar-like star HD 140538. Astronomy and Astrophysics. 628. A107–A107. 5 indexed citations
5.
Fuhrmeister, B., et al.. (2017). The Ca ii infrared triplet’s performance as an activity indicator compared to Ca ii H and K. Astronomy and Astrophysics. 605. A113–A113. 26 indexed citations
6.
Mittag, M., A. Hempelmann, J. H. M. M. Schmitt, et al.. (2017). Stellar rotation periods determined from simultaneously measured Ca II H&K and Ca II IRT lines. Astronomy and Astrophysics. 607. A87–A87. 14 indexed citations
7.
Mittag, M., K.‐P. Schröder, A. Hempelmann, J. N. González‐Pérez, & J. H. M. M. Schmitt. (2016). Chromospheric activity and evolutionary age of the Sun and four solar twins. Astronomy and Astrophysics. 591. A89–A89. 27 indexed citations
8.
Hempelmann, A., M. Mittag, J. N. González‐Pérez, et al.. (2015). Measuring rotation periods of solar-like stars using TIGRE. Astronomy and Astrophysics. 586. A14–A14. 32 indexed citations
9.
Schmitt, J. H. M. M., K.‐P. Schröder, G. Rauw, et al.. (2015). TheαCrB binary system: A new radial velocity curve, apsidal motion, and the alignment of rotation and orbit axes. Astronomy and Astrophysics. 586. A104–A104. 11 indexed citations
10.
Rauw, G., Anthony Hervé, Yaël Nazé, et al.. (2015). Simultaneous X-ray and optical spectroscopy of the Oef supergiantλCephei. Astronomy and Astrophysics. 580. A59–A59. 32 indexed citations
11.
Hempelmann, A., et al.. (2013). Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records. Climate of the past. 9(1). 447–452. 30 indexed citations
12.
Schröder, K.‐P., M. Mittag, A. Hempelmann, J. N. González‐Pérez, & J. H. M. M. Schmitt. (2013). What do the Mt. Wilson stars tell us about solar activity?. Astronomy and Astrophysics. 554. A50–A50. 20 indexed citations
13.
Mittag, M., A. Hempelmann, J. N. González‐Pérez, J. H. M. M. Schmitt, & J. C. Hall. (2011). Results of the First Observations with the Hamburg Robotic Telescope. ASPC. 448. 1187. 1 indexed citations
14.
Hempelmann, A., J. H. M. M. Schmitt, S. L. Baliunas, & R. A. Donahue. (2003). Evidence for coronal activity cycles on 61 Cygni A and B. Astronomy and Astrophysics. 406(2). L39–L42. 20 indexed citations
15.
Hempelmann, A.. (2003). Wavelet analysis of stellar differential rotation. Astronomy and Astrophysics. 399(2). 717–721. 5 indexed citations
16.
Lehmann, H., A. Hempelmann, & Uwe Wolter. (2002). High-resolution spectroscopic monitoring of SV Camelopardalis. Astronomy and Astrophysics. 392(3). 963–970. 8 indexed citations
17.
Hempelmann, A., J. H. M. M. Schmitt, M. Schultz, G. Ruêdiger, & K. Stȩpień. (1995). Coronal X-ray emission and rotation of cool main-sequence stars.. A&A. 294. 515–524. 2 indexed citations
18.
Hempelmann, A., et al.. (1995). Spots, plages, and coronal X-ray sources on SV Cam: results from a multi-wavelength campaign. 176. 194. 1 indexed citations
19.
Hempelmann, A. & Jürgen Kurths. (1990). Dynamics of the outburst series of SS Cygni.. 232(2). 356–366. 8 indexed citations
20.
Hempelmann, A., et al.. (1980). Ten colour photometry of twelve ap‐stars. Astronomische Nachrichten. 301(2). 71–93. 13 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.

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