H2020Индивидуална стипендия2021–2024

REVErSI · REVealing the Effects of Star-planet Interactions

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

Период: 2021-12-01 → 2024-11-30
Финансиране от ЕС: 259 399 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Взаимодействията между екзопланети и техните звезди, като например влиянието на магнитните полета и приливните сили, се анализират чрез нови модели. Това помага да се разбере дали една планета е гостоприемна за живот, тъй като магнитното ѝ поле я предпазва от звездния вятър.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

REVealing the Effects of Star-planet Interactions

The discoveries of the first planets outside the Solar System in the 1990s opened the completely new research topic of exoplanetary science. Since then, the existence of over 4300 exoplanets has been confirmed and exoplanetary science has become one of the main branches of astrophysics. Exoplanets are discovered with several techniques providing complementary information on the objects: transit photometry can unveil the planet’s radius, while the radial velocity technique can give estimates of the planet’s mass. New insights on exoplanet characterization will soon come also from space missions like TESS, CHEOPS (already online) and JWST and PLATO (planned). However, two of the most critical aspects of exoplanetary systems remain very difficult to assess: 1) The magnetisation of exoplanets, which plays a central role in planetary habitability. A planetary magnetic field shields the planetary surface from the destructive flux of charged particles of stellar winds, so that life can evolve. Knowing planetary magnetism it is necessary to understand exoplanetary climates and address exoplanetary habitability. 2) The interaction between the planet and its host star, which is mediated by gravitation, radiation, magnetic fields, and the stellar wind. While it is clear that these star-planet interactions (SPIs) affect the planet, it is unclear whether they have an observable effect on the star. Understanding the physics governing SPIs is essential to push exoplanetary science into the next era. REVErSI is an ambitious project that aims to provide access to these two characteristics for the first time. By developing analytical and numerical models of SPIs, and constraining them on available stellar observables, this project unravels the effect of magnetic and tidal SPIs on the activity of the host star. As a second step, REVErSI will use models of magnetic SPI to predict the magnetic field strength of some exoworlds. Being able to characterize exoworlds is central for the human need of exploring and discovering the universe. Ask any kid around the world, or almost any kid, and they are fascinated by understanding remote areas of the universe where, possibly, life exists. This project is a step in this direction.

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

Цел на проекта

Exoplanetary science has thrived in the last three decades; we now know of thousands of new worlds orbiting other stars, and we are investing new ground-based and space facilities in characterizing them.However, the interaction between planets and their host stars is still poorly understood. In this new, exciting field, REVErSi will offer a comprehensive theoretical study of star-planet interactions using innovative analytical models and state-of-the-art numerical simulations.REVErSI will study the tidal, and magnetic interactions of the most common type of exoplanets, Hot Jupiters (HJs), with low-mass stars: M-dwarfs and Solar-like stars. HJs lie close enough to their host star to be magnetically interacting with it. We will study the effect of this interaction on the stellar dynamo, and the magnetic cycle of the star, analytically and numerically. In parallel, we will investigate the role of planet-induced tides on the magnetic activity of the star.Finally, we will examine the variation of the stellar activity as a means of estimating exoplanetary magnetic fields. This contribution will provide one of the very few currently feasible methods to estimate exoplanetary magnetic fields.

Оригинален текст от CORDIS (на английски).

Участници

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS · MadridКоординаторИспания