14–24 Jul 2025
CICG - International Conference Centre - Geneva, Switzerland
Europe/Zurich timezone
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The Role of the Heliosphere in Shaping the Observed Cosmic Ray Spectral Anisotropy

18 Jul 2025, 14:20
15m
CICG - International Conference Centre - Geneva, Switzerland

CICG - International Conference Centre - Geneva, Switzerland

17 rue de Varembé CH - 1211 Geneva Switzerland
Talk Cosmic-Ray Indirect CRI

Speaker

Dr Vanessa López-Barquero (University of Maryland College Park)

Description

Experimental results by Milagro, HAWC, and ARGO-YBJ have observed variations in the energy spectrum of cosmic rays at TeV scales in different regions of the sky. These findings on the spectral anisotropy provide insights into cosmic ray behavior. This work explores the impact of galactic CR interactions with the heliosphere in creating the observed spectral anisotropy features. Specifically, the features around 1-10 TeV, where our previous studies on the heliosphere have shown the greatest effects. In this project, we integrate particle trajectories in a state-of-the-art MHD-kinetic heliosphere model that includes the effects of the solar cycle and interaction with the interstellar medium’s magnetic field. With these elements, this will be the first time the exact effects of the heliosphere’s magnetic field are tested to determine whether they influence galactic CRs and the spectral anisotropy.

Author

Dr Vanessa López-Barquero (University of Maryland College Park)

Co-authors

Paolo Desiati (University of Wisconsin - Madison) Dr Juan Carlos Diaz-Velez (University of Wisconsin-Madison) Mr Andrés Marín Portuguez (University of Costa Rica)

Presentation materials

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