H2020Индивидуална стипендия2019–2021

SolarIC · A New Monitor for Cosmic Rays in the Solar System: Inverse-Compton Emission from Cosmic-Ray Electrons Scattering with Sunlight

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-09-01 → 2021-08-31
Финансиране от ЕС: 175 572 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Гама-лъчите от Слънцето се анализират, за да се разбере как космическите лъчи се движат в пространството между Земята и Слънцето. Това помага за по-точното моделиране на космическото време, което влияе върху работата на сателитите и безопасността на астронавтите.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

A New Monitor for Cosmic Rays in the Solar System: Inverse-Compton Emission from Cosmic-Ray Electrons Scattering with Sunlight

The project (named SolarIC) aims to study the problem of how cosmic rays interact with the Sun. Gamma rays from the Sun has recently been detected, and has many interesting properties. However, detailed theoretical understanding is lacking, which limits the potential of using these gamma rays as a probe of cosmic rays physics in the solar system as well as physics of the Sun. The overall goal of SolarIC is, through both observational and theoretical studies, to realize gamma-ray observation as a novel probe of the Sun as well as cosmic-ray propagation in the solar system. There are two main problems that this project could address. 1) Current gamma-ray observations of the Sun lacks theoretical understanding, and lacks detailed observational exploration. In particular, many of the gamma-ray observations from the solar atmosphere itself is unexplained. 2) These gamma ray production depends on cosmic-ray propagation in the solar system, in particular in the volume between the Earth and the Sun. The properties of the cosmic rays propagation in this volume is poorly understood, and difficult send detector to directly study. Gamma rays could therefore provide an indirect mean to study this. Understanding this problem is important, as the activities in the solar atmosphere and the how charged particles propagate in the solar system are important components of space weather, which significantly affects satellite operation, astronaut safety, and terrestrial electrical infrastructures. Gamma rays could be a new tool to study this problem, which may offer new insights for better and more accurate space weather modeling.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

How well do we understand charged particle propagation in the solar system? This is an important topic for both astrophysics and space weather. Unfortunately, we still lack a fully predictive theory to this problem; a major challenge to this is the lack of cosmic-ray (CR) measurement throughout the solar system, as most data are measured locally on Earth. I propose to overcome this hurdle in my SolarIC project by using the solar inverse-Compton (IC) emission—produced by CR electrons scattering with Sunlight—as a remote probe for CR distribution throughout the solar system. I will achieve this through three main results. First, I will detect and analyze the solar IC emission with Fermi-LAT data to study its morphology and time dependence. Second, I will calculate the theoretical prediction of the solar IC emission for both GeV and MeV regimes, utilizing state-of-the-art CR simulations. This will be a theoretical foundation for interpreting the data. And for the first time, I will compute the polarization signatures of solar IC emission. Third, building on the previous two results, I will constrain and test contemporary models of CR propagation in the solar system through cross correlation of the Fermi-LAT data with the theory prediction. I will also perform a mock tomographic analysis of the solar IC emission, utilizing the polarization signature. This will be an important and novel prediction for the proposed future MeV space gamma-ray telescopes, such as e-ASTROGAM. Through my SolarIC project, I will demonstrate that solar IC emission can be used to provide valuable data and constraints on CR distribution in the solar system. This will be an important step leading to a better understanding of charged-particle propagation in the solar system, which will have significant impacts on many astrophysics disciplines including solar physics, cosmic-ray physics, neutrino astrophysics, and dark matter searches.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITEIT VAN AMSTERDAM · AmsterdamКоординаторНидерландия