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Prof. Dr. Klaus Strassmeier

Image of Klaus Strassmeier
Stellar Activity
Emeritus
Office: HH/104
Phone: +49 331 7499 295
kstrassmeiernothing@aip.de

Leibniz-Institut
für Astrophysik Potsdam (AIP)
An der Sternwarte 16
14482 Potsdam

Publications

Latest refereed publications, retrieved from NASA ADS:

PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). II. Phase-resolved Cross-correlation Transmission Spectroscopy of KELT-20b
Lenhart, C., ... Strassmeier, K. G., Ilyin, I., 2026
The Astronomical Journal, 171, 2, 81; published February 2026
doi:10.3847/1538-3881/ae2252, NASA ADS
Participating AIP research groups: High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation), Stellar Activity, Astronomical Spectroscopic Instrumentation
PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-resolution Phased-resolved Spectroscopy of the Ultra-hot-Jupiter KELT-20 b
Bonidie, V., ... Strassmeier, K., Ilyin, I., 2026
The Astronomical Journal, 171, 1, 34; published January 2026
doi:10.3847/1538-3881/ae21be, NASA ADS
Participating AIP research groups: High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation), Stellar Activity, Astronomical Spectroscopic Instrumentation
PEPSI investigation, retrieval, and atlas of numerous giant atmospheres (PIRANGA) ─ III. Composition and winds in the atmosphere of TOI-1518 b
Basinger, C., ... Ilyin, I., Strassmeier, K., 2025
Monthly Notices of the Royal Astronomical Society, 543, 4, 4136; published November 2025
doi:10.1093/mnras/staf1648, NASA ADS
Participating AIP research groups: High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation), Stellar Activity
Surface activity of a Rossby sequence of cool Hyades stars
Strassmeier, K. G., Ilyin, I., Steffen, M., Barnes, S. A., 2025
Astronomy and Astrophysics, 704, A8; published November 2025
doi:10.1051/0004-6361/202556888, NASA ADS
Participating AIP research groups: Stellar Physics and Exoplanets, High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation), Stellar Activity
Weakened Magnetic Braking Signals the Collapse of the Global Stellar Dynamo
Metcalfe, T. S., ... Ilyin, I. V., Strassmeier, K. G., 2025
The Astrophysical Journal, 991, 1, L17; published September 2025
doi:10.3847/2041-8213/ae03bc, NASA ADS
Participating AIP research groups: High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation), Stellar Activity
Four decades of photometry of XX Trianguli, 'the most spotted star' in the sky
Kővári, Z., Strassmeier, K. G., ..., 2025
Astronomy and Astrophysics, 701, A103; published September 2025
doi:10.1051/0004-6361/202555542, NASA ADS
Participating AIP research groups: Stellar Activity
Testing the Rossby Paradigm: Weakened Magnetic Braking in Early K-type Stars
Metcalfe, T. S., ... Ilyin, I. V., Strassmeier, K. G., ..., 2025
The Astrophysical Journal, 986, 2, 120; published June 2025
doi:10.3847/1538-4357/add40a, NASA ADS
Participating AIP research groups: Stellar, Solar and Exoplanetary Physics, High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation)
The PLATO mission
Rauer, H., ... Barnes, S., ... Chiappini, C., ... Poppenhaeger, K., ... Strassmeier, K., ... Valentini, M., ... Weingrill, J., ..., 2025
Experimental Astronomy, 59, 3, 26; published June 2025
doi:10.1007/s10686-025-09985-9, NASA ADS
A search for Maunder-minimum candidate stars
Järvinen, S. P., Strassmeier, K. G., 2025
Astronomy and Astrophysics, 698, A93; published June 2025
doi:10.1051/0004-6361/202554111, NASA ADS
PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). I. The Ubiquity of Fe I Emission and Inversions in Ultrahot Jupiter Atmospheres
Petz, S., ... Ilyin, I., Strassmeier, K. G., 2025
The Astronomical Journal, 169, 5, 267; published May 2025
doi:10.3847/1538-3881/adc411, NASA ADS
Participating AIP research groups: Stellar, Solar and Exoplanetary Physics, High-resolution Spectroscopy and Polarimetry (now: Astronomical Spectroscopic Instrumentation)