Ruprecht-Karls-Universität Heidelberg

Astronomisches Rechen-Institut

Address:

Astronomisches Rechen-Institut
Mönchhofstr. 12-14
69120 Heidelberg
Germany
Directions

The Astronomisches Rechen-Institut (ARI) is part of the newly established Centre for Astronomy of Heidelberg University (Zentrum für Astronomie der Universität Heidelberg or ZAH). The other two institutes in the ZAH are the Institute for Theoretical Astrophysics (Institut für Theoretische Astrophysik or ITA) and the State Observatory Königstuhl (Landessternwarte Königstuhl or LSW).

The scientific activities at the ARI cover a broad range of research areas including cosmology, gravitational lensing, galaxy evolution, star clusters, stellar astrophysics, the interstellar medium, astrometry, satellite missions, and calendrical calculations.

The ARI is involved in various national and international scientific networks and collaborations.  The institute plays a leading role in supporting the Gaia satellite mission of the European Space Agency and participates in the ground-based spectroscopic and photometric SDSS, 4MOST, and LSST surveys.

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News
Colloquia
Jun 20
11:00
Expediting Astronomical Discovery with
Yuan-Sen Ting (OSU)
Königstuhl Kolloquium
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
Jun 24
16:30
De-mystifying galactic outflows driven by supermassive black holes
Chris Harrison (Newcastle University )
Heidelberg Joint Astronomical Colloquium
Philosophenweg 12, Main Lecture hall (gHS),
Jun 26
11:15
A tutorial on Gaia's astrometric data and their usage.
Ulrich Bastian (ARI)
ARI Institute Colloquium
ARI, Moenchhofstrasse 12-14, Seminarraum 1.OG

Recent publications
6/2025
Méndez-Delgado, J. E.; Skillman, E. D. et al. (inc. Tan, S.; Kreckel, K.)
Generalized Te([O III])–Te(He I) Discrepancies in Ionized Nebulae: Possible Evidence of Case B Deviations and Temperature Inhomogeneities
ApJ 986, 74(2025)

5/2025
Leanza, S.; Dalessandro, E. et al. (inc. Martocchia, S.)
Stellar rotation in the intermediate-age massive cluster NGC 1783: Clues about the nature of UV-dim stars
A&A 698, A27(2025)

6/2025
Villaseñor, J. I.; Sana, H. et al. (inc. Schneider, F. R. N.; Sander, A. A. C.; Ramachandran, V.)
Binarity at LOw Metallicity (BLOeM): Enhanced multiplicity of early B-type dwarfs and giants at Z = 0.2 Z
A&A 698, A41(2025)