H2020Индивидуална стипендия2020–2022

CICLE · Unveiling the formation and evolution of galaxy clusters through the intracluster light and multidisciplinar techniques of image processing and big data analysis

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

Период: 2020-04-01 → 2022-07-21
Финансиране от ЕС: 172 932 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Светлината между галактиките в големите галактически клъстери се изследва чрез анализ на звезди, които не принадлежат към конкретна галактика. Това помага да се разберат историята на формирането на тези структури и динамиката на Вселената.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Unveiling the formation and evolution of galaxy clusters through the intracluster light and multidisciplinar techniques of image processing and big data analysis

Clusters of galaxies are the largest and most massive structures gravitationally bound in the Universe. They are composed of different components, such as galaxies, hot gas, and dark matter. This project focuses on a fourth and barely studied component, the intracluster light (ICL), formed by stars bound gravitationally by the cluster but not hosted by any galaxy. Different cluster galaxies initially hosted these stars but different mechanisms, more or less violent, stripped them out and threw them into the intracluster space. Therefore, the ICL and its properties depend directly on the assembling history of the cluster and its current state. Knowledge about the properties of the ICL, its formation pathways, and its evolution give us insights into the dynamics of clusters and, consequently, into the mechanisms that reign the Universe. The main objectives of this project are: 1) characterizing the physical properties of the ICL, 2) identifying the main channels that create and feed the ICL, 3) linking the properties of the ICL and the total clusters, and 4) understanding the evolution of the ICL across cosmic time. With this project I conclude that the ICL is intimately linked to the dynamical stage of the cluster, at all redshifts. The ICL is a record of the cluster's history and a tale of the formation and evolution of the cluster that we can read, with different colors, shapes, and properties depending on the merger history of the system. Also, the ICL is crucial to analyze clusters observed by the recently launched James Webb telescope.

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

Цел на проекта

The intracluster light (ICL) is defined as the luminous component of the clusters of galaxies which is formed by stars that are gravitationally bound to the cluster potential but do not belong to any galaxy in particular. Its properties give insights on cluster formation and evolution, determine the dynamical stage of the system, estimate its age, improve scaling relations, and constrain the cosmological parameters. Its study is limited because the ICL has a very low surface brightness and traditional techniques assume different a priori hypotheses that bias the final results. As a consequence, ICL studies are rare and often draw inconsistent (or even contradictory) conclusions and results. We developed and tested successfully the first algorithm to analyze images of galaxy clusters and measure ICL properties completely free of a priori assumptions, called CICLE. CICLE gathers mathematical tools of image modelling and characterisation, and algorithms of multiresolution analysis. Some of these tools were developed in-house and are multidisciplinar.Our goal is to carry out the first extensive, systematic, and consistent study of the ICL in groups and clusters of galaxies using CICLE and high-quality data from HST and the J-PAS project. We plan to split the study in three subprojects, according to the characteristics of the systems: i) massive clusters, ii) non-massive clusters and groups, and iii) fossil groups. This work would report: a) observationally, images and data of high scientific impact, attractive to different astronomical areas, b) analytically, new and versatile techniques of big data analysis, with potential to be widely used not only in Astronomy but also in other fields as Geophysics, Medicine, or Biochemistry, and c) scientifically, the first unbiased and large-scale characterization of the ICL and the discovery of the effect of this component on the process of formation and evolution of clusters of galaxies, still unknown.

Оригинален текст от CORDIS (на английски).

Участници

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS · MadridКоординаторИспания