Tootfinder

Interstellar Neutral Hydrogen in the Heliosphere: New Horizons Observations in the Context of Models
P. Swaczyna, M. Bzowski, K. Dialynas, L. Dyke, F. Fraternale, A. Galli, J. Heerikhuisen, M. Z. Kornbleuth, D. Koutroumpa, I. Kowalska-Leszczy\'nska, M. A. Kubiak, A. T. Michael, H. -R. M\"uller, M. Opher, F. Rahmanifard
https://

Interstellar Neutral Hydrogen in the Heliosphere: New Horizons Observations in the Context of Models
Interstellar neutral (ISN) hydrogen is the most abundant species in the outer heliosheath and the very local interstellar medium (VLISM). Charge exchange collisions in the outer heliosheath result in filtration, reducing the ISN hydrogen density inside the heliosphere. Additionally, these atoms are intensively ionized close to the Sun, resulting in a substantial reduction of their density within a few au from the Sun. The products of this ionization - pickup ions (PUIs) - are detected by charge…

NASA’s #Voyager 1 spacecraft is conducting normal science operations for the first time following a technical issue that arose in November 2023: https://blogs.nasa.gov/voyager/2024/06/13/voyager-1-returning-science-data-from-all-four-instruments/ - its four instruments study plasma waves, magnetic fields, and particles; Voyager 1 and Voyager 2 are the only spacecraft to directly sample interstellar space, which is the region outside the heliosphere — the protective bubble of magnetic fields and solar wind created by the Sun.

A SART-Based Iterative Inversion Methodology to Infer the Solar Rotation Rate from Global Helioseismic Data
Sylvain G. Korzennik, Antonio Eff-Darwich
https://arxiv.org/abs/2406.10183

A SART-Based Iterative Inversion Methodology to Infer the Solar Rotation Rate from Global Helioseismic Data
We present a new iterative rotation inversion technique based on the Simultaneous Algebraic Reconstruction Technique developed for image reconstruction. We describe in detail our algorithmic implementation and compare it to the classical inversion techniques like the Regularized Least Squares (RLS) and the Optimally Localized Averages (OLA) methods. In our implementation, we are able to estimate the formal uncertainty on the inferred solution using standard error propagation, and derive the ave…

This https://arxiv.org/abs/2311.02753 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Very Local Impact on the Spectrum of Cosmic-Ray Nuclei below 100 TeV
Recent measurements of primary and secondary CR spectra, their arrival directions, and our improved knowledge of the magnetic field geometry around the heliosphere allow us to set a bound on the distance beyond which a puzzling 10-TeV ``bump'' and certain related spectral features \emph{cannot} originate. The sharpness of the spectral breaks associated with the bump, the abrupt change of the CR intensity across the local magnetic equator ($90^{\circ}$ pitch angle), and the similarity between th…

Multi-source connectivity as the driver of solar wind variability in the heliosphere: #SolarWind unveiled by Solar Orbiter mission: https://www.northumbria.ac.uk/about-us/news-events/news/solar-orbiter/

Effects of an Explicit Time-Dependent Radiation Pressure Force on Trajectories of Primary Neutral Hydrogen in the Heliosphere
Lucas Dyke, Hans-Reinhard M\"uller
https://arxiv.org/abs/2404.17659

Effects of an Explicit Time-Dependent Radiation Pressure Force on Trajectories of Primary Neutral Hydrogen in the Heliosphere
Radiation pressure exerted by solar photon output is salient to the motion of primary neutral hydrogen atoms streaming into the inner heliosphere directly from the Local Interstellar Medium (LISM). The action of a time-dependent radiation pressure force, when coupled with the usual gravitational force, changes the characteristic velocities, and therefore energies, of the atoms when they reach regions in which explorer probes are present. A study is presented that uses a 2D code to backtrace neu…