2022 – 2024

DFG-funded Initialisation of an International Collaboration (Project nr. 508335258)

September 2022 (Meeting at CHPC in Cape Town) – Kick-off Meeting

in person: Dr. Klaus Scherer, Dr. Frederic Effenberger, PD Dr. Konstantin Herbst, Prof. Dr. Stefan Ferreira, M.Sc. Juandre Light, B.Sc. Andrea Marais

online: Dr. Jens Kleimann, PD Dr. Dominik Bomans, Prof. Dr. Eugene Engelbrecht, Prof. Dr. Du Toit Strauss

October 2022 (Meeting in Potchefstroom) – discussion on future collaborations

in person: Dr. Klaus Scherer, PD Dr. Konstantin Herbst, Prof. Dr. Stefan Ferreira, Prof. Dr. Eugene Engelbrecht, Prof. Dr. Du Toit Strauss, M.Sc. Juandre Light

online: Dr. Frederic Effenberger, PD Dominik Bomans

November 2023 (Meeting in Potchefstroom) – finalization of Engelbrecht et al. and revision of Herbst et al.

in person: Dr. Klaus Scherer (RUB), PD Dr. Horst Fichtner (RUB), PD Dr. Konstantin Herbst (CAU), Dr. Frederic Effenberger (RUB), Dr. Judy Chebly (AIP), MSc. Jeremiah Luebke (RUB), MSc. Sophie Aerdker (RUB), MSc. Julien Dörner (RUB), MSc. Lukas Merten (RUB), Prof. Dr. Stefan Ferreira, Prof. Dr. Eugene Engelbrecht, Prof Dr. Du Toit Strauss, MSc. Juandre Light

online: Dr. Julián Alvarado-Goméz (AIP)

April 2024 (Meeting in Bochum) – final discussion on Scherer, Herbst, Engelbrecht et al. (a)

in person: Dr. Klaus Scherer (RUB), PD Dr. Konstantin Herbst (CAU), Prof. Dr. Eugene Engelbrecht (NWU)

May 2024 (final meeting in Potchefstroom) – final discussion on Scherer, Herbst et al. (b) and writing of the DFG report

in person: Dr. Klaus Scherer (RUB), PD Dr. Konstantin Herbst (CAU), Prof. Dr. Stefan Ferreira, Prof. Dr. Eugene Engelbrecht, Prof Dr. Du Toit Strauss, Dr. Juandre Light (NWU)

Project output

01/2024	Herbst et al., Impact of Cosmic Rays on Atmospheric Ion Chemistry and Spectral Transmission Features of TRAPPIST-1e, ApJ, 961:164
02/2024	Engelbrecht, Herbst et al., On the Comprehensive 3D Modelling of the Radiation Environment of Proxima Centauri b: a New Constraint on Habitability?, ApJ, 964:89
11/2024	Scherer, Herbst et al., Modeling the astrosphere of LHS 1140 On the differences of 3D magnetohydrodynamic single- and multi-fluid simulations and the consequences for exoplanetary habitability, Astron. Astrophys., 694, A106
01/2025	Light, J., N.E. Engelbrecht, K. Herbst, K. Scherer, On the 3D transport of galactic cosmic rays in a selection of exoplanet-hosting astrospheres: The influence of stellar rotation, MNRAS, 537, 2.

2019 – 2022

International Space Science Institute Team 464 „The Role Of Solar And Stellar Energetic Particles On (Exo)Planetary Habitability (ETERNAL)„

Project output

2022 [7]

[30] Papaioannou, A., K. Herbst, T. Ramm. E. W. Cliver, D. Lario, and A. M. Veronig, Revisiting Empirical Solar Energetic Particle Scaling Relations – I. Solar flares, accepted at A&A, preprint available at ArXiv

[29] Light, J., S.E.S. Ferreira, N.E. Engelbrecht, K. Scherer, and K. Herbst, On the numerical modeling of astrospheres, including those of Luminous Blue Variable stars, and the modulation of cosmic rays within, MNRAS, stac2312

[28] Herbst, K., L. Baalmann, A. Bykov, N. E. Engelbrecht, S. E. S. Ferreira, V. V. Izmodenov, S. Korolkov, K. P. Levenfish, J. L. Linsky, D. M.-A. Meyer, K. Scherer and R. D. T. Strauss, Astrospheres of Planet-Hosting Cool Stars and Beyond – When Modeling Meets Observations, Space Sci. Rev., 218:29 (open access)

[27] Engelbrecht, N. E., A. Vogt, K. Herbst, D. T. Strauss, A. Burger, Revisiting the Revisited Palmer Consensus: New Insights from Jovian Electron Transport, ApJ, 929, 8. (open access)

[26] Papaioannou, A., A. Kouloumvakos, A. Mishev, R. Vainio, I. Usoskin, K. Herbst, et al., The First Ground Level Enhancement of Solar Cycle 25 on 28 October 2021, Astron. Astrophys., 660, L5, preprint available at ArXiv.

[25] Grenfell, J. L., F. Wunderlich, M. Sinnhuber, K. Herbst, et al., Atmospheric processes affecting methane on Mars, ICARUS, 114940, preprint available at ArXiv.

[24] Hu, J., V. S. Airapetian, G. Li, G. Zank, and M. Jin, Extreme Energetic Particle Events by Superflare Associated CMEs from Solar-like Stars, Sci. Adv., 8.

2021 [11]

[23] Namekata, K., Maehara, H., Honda, S. et al. Probable detection of an eruptive filament from a superflare on a solar-type star, Nat Astron. (open access)

[22] Herbst, K., J. L. Grenfell, M. Sinnhuber, and F. Wunderlich, INCREASE – An updated model suite to study the INfluence of Cosmic Rays on Exoplanetary AtmoSpherEs, Astron. Nachr., 1. (open access)

[21] Snellen, I., + 66 co-authors,  Detecting life outside our solar system with a large high-contrast-imaging mission, Exp. Astron..

[20] Gebauer, S., I. Vilovic, J. L. Grenfell, F. Wunderlich, F. Schreier, and H. Rauer, Influence of Biomass Emissions on Habitability, Biosignatures, and Detectability in Earth-like Atmospheres, ApJ 909:128.

[19] Mekhaldi, F., F. Adolphi, K. Herbst, and R. Muscheler, The signal of solar storms embedded in cosmogenic radionuclides: Detectability and uncertainties, JGR: Space Physics, 126, e2021JA029351.

[18] Airapetian, V. S., M. Jin, T. Lueftinger, S. B. Saikia, O. Kochukhov, M. Guedel, B. Van Der Holst, and W. Manchester IV, One Year in the Life of Young Suns: Data Constrained Corona-Wind Model of k1 Ceti, ApJ, 916 96.

[17] Lavasa E., G. Giannopoulos, A. Papaioannou, A. Anastasiadis, I. A. Daglis, A. Aran, D. Pacheco, and B. Sanahuja, Assessing the predictability of Solar Energetic Particles with the use of machine learning techniques, Solar Physics, 296, 107.

[16] Caprotti, A., M. Brüdern, S. Burmeister, B. Heber, and K. Herbst, Yield function of the DOSimetry TELescope count and dose rates aboard the International Space Station, Space Weather, 19, e2020SW002510.

[15] Herbst, K., A. Papaioannou, V. S. Airapetian, and D. Atri, From Starspots to Stellar Coronal Mass Ejections – Revisiting Empirical Stellar Relations, ApJ, 907, 89. Preprint available at ArXiv.

[14] Maehara, H., Y. Notsu, K. Namekata, et al., Time-resolved spectroscopy and photometry of an M dwarf flare star YZ Canis Minoris OISTER and TESS: Blue asymmetry in Hα line during the non-white light flare, PASJ, 73, 1. Preprint available at ArXiv.

[13] Okamoto, S., Y. Notsu, H. Maehara, K. Namekata, S. Honda, K. Ikuta, D. Nogami, and K. Shibata, Statistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission Data, ApJ, 906 72. preprint available at ArXiv.

2020 [11]

[12] Gebauer, S., J. L. Grenfell, H. Lammer, J.-P. P. de Vera, L. Sproß, V. S. Airapetian, M. Sinnhuber, and H. Rauer, Atmospheric Nitrogen When Life Evolved on Earth, Astrobiology, 20, 12.

[11] Toriumi, S., V. S. Airapetian, H. Hudson, C. J. Shriver, M.C. M. Chueng, and M. L. DeRosa, Sun-as-a-star Spectral Irradiance Observations of Transiting Active Regions, ApJ, 902:36.

[10] Grenfell, J. L., J. Leconte, F. Forget, M. Godolt, Ó. Carrión-González, L. Noack, F. Tian, H. Rauer, F. Gaillard, É. Bolmont, B. Charnay, and M. Turbet, Atmospheric Diversity of Low Mass Exoplanets – some Central Aspects, Space Science Reviews, 216, 89.

[9] Herbst, K., K. Scherer, S.E.S. Ferreira, L. R. Baalmann, E. N. Engelbrecht, H. Fichtner, J. Kleimann, R.D.T. Strauss, D. Moeketsi, and S. Mohamed, On the Diversity of M-Star astrospheres and the Role of Galactic Cosmic Rays Within, ApJ Letters, 897, 2, preprint available at ArXiv.

[8] Ortenzi, G., L. Noack, F. Sohl, C. M. Guimond, J. L. Grenfell, C. Dorn, J. M. Schmidt, S. Vulpius, N. Katyal, D. Kitzmann, and H. Rauer, Mantle redox state drives outgassing chemistry and atmosphere composition of rocky planets, Scientific Reports, 10, 10907.

[7] Grenfell, J. L.,  M. Godolt, J. Cabrera, L. Carone, A. Garcίa Muñoz, D. Kitzmann, A. M. S. Smith, and Heike Rauer, Atmospheric Characterization via Broadband Color Filterson the PLAnetary Transits and Oscillations of stars (PLATO) Mission, Experimental Astronomy, 50, 1–49, preprint available at ArXiv.

[6] Vogt, A., E. N. Engelbrecht, R. D. Strauss, B. Heber, A. Kopp, and K. Herbst, On the residence-time of Jovian electrons in the inner heliosphere, A&A, 642, A170.

[5] Scheucher, M., F. Wunderlich, J. L. Grenfell, et al., Consistently Simulating a Wide Range of Atmospheric Scenarios for K2-18b with a Flexible Radiative Transfer Module, ApJ, 898, 1, preprint available at ArXiv.

[4] Scheucher, M., K. Herbst, V. Schmidt, J. L. Grenfell, F. Schreier, S. Banjac, B. Heber, H. Rauer, and M. Sinnhuber, Proxima Centauri b: A Strong Case for including Cosmic-Ray-induced Chemistry in Atmospheric Biosignature Studies, ApJ, 893:12 (7pp), preprint available at ArXiv.

[3] Scherer, K., L. R. Baalmann, H. Fichtner, J. Kleimann, D. J. Bomans, K. Weis, S.E.S. Ferreira, and K. Herbst, MHD-shock structures of astrospheres: λ Cephei-like astrospheres, MNRAS, 493, 3, preprint available at ArXiv.

[2] Herbst, K., S. Banjac, D. Atri, and T. A. Nordheim, Revisiting the cosmic-ray induced Venusian radiation dose in the context of habitability, Astron. Astrophys., 633, A15, 2020, preprint available at ArXiv.

2019 [1]

[1] Herbst, K., J. L. Grenfell, M. Sinnhuber, H. Rauer, B. Heber, S. Banjac, M. Scheucher, V. Schmidt, S. Gebauer, R. Lehmann, and F. Schreier, A new model suite to determine the influence of cosmic rays on (exo)planetary atmospheric biosignatures. Validation based on modern Earth, Astron. Astrophys., 631, A101, preprint available at ArXiv