FP7Реинтеграция2012–2016

MULTIFAST · Variability in Relativistic Jets: the Fastest Time Scales at all Wavelengths

7РП — „Хора“ (Действия „Мария Кюри“)

Период: 2012-09-01 → 2016-08-31
Финансиране от ЕС: 100 000 €
Участници: 1
Схема: MC-CIG

Линиите свързват координатора с партньорите.

Накратко на български

Релативистските струи от компактни обекти се анализират чрез бързи промени в светлината им, например откриването на специфични трептения в инфрачервения спектър. Това помага за разбирането на връзката между падащата към обекта материя и изхвърлянето на тези струи.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Variability in Relativistic Jets: the Fastest Time Scales at all Wavelengths

Jets appear to be ubiquitous in accreting systems, but the origin of the observed accretion disc-jet coupling remain largely unknown. The project proposed to fully harness a new window recently opened in Astrophysics: the study of multi-lambda fast variability from relativistic jets from stellar-mass compact objects. The objective has been tackled with a multi-disciplinary approach, working on both observations and theory, maximizing the scientific exploitation of the method. The project has evolved smoothly and overall successfully. The PI of the project was hired with a permanent position at the host institution, and one post-doctoral fellow was hired to work fully on the project. The team has included also two undergraduate students, who have both obtained their Master degree with a thesis on this project under the PI supervision. One of them has entered subsequently a PhD program at the Università dell’Insubria, with a project under the PI co-supervision. Several international collaborators have been invited to work with the team on the various aspects of the projects. The three main objectives of the projects (definition and implementation of timing statistics and software; numerical code for the variable emission from a relativistic jet; analysis of existing datasets) have proceeded as planned, and initial important results have been obtained, including: the discovery of a peculiar quasi-periodic oscillation in the infrared emission, at half the frequency of the one observed simultaneously in X-rays, allowing us to place geometrical constraints to the accretion flow (Kalamkar, Casella et al. 2016, MNRAS, 460, 3284); the discovery of the first sub-second quasi-periodic oscillation in the infrared emission from a jet (Casella et al. 2016, to be submitted); the detailed study of the infrared-X-ray rms-flux relation (Vincentelli et al. 2016, to be submitted); the discovery of important novel re-heating properties of internal jet variability (Pe’er, Long & Casella, submitted to ApJ); the definition and implementation of a new timing technique to obtain an estimate of the Transfer Function in case of non linearity (Vincentelli et al. 2017, to be submitted). Other results have been and are being obtained within the above mentioned international collaborations, from which other publications have resulted and others are foreseen. This project has provided the fellow with an excellent visibility within and outside the host country, helping his re-integration after his years abroad.

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

Цел на проекта

I propose to fully harness a new exciting window recently opened in Astrophysics, which I am pioneering: the study of multi-lambda fast variability from relativistic jets from stellar-mass compact objects. I will (a) identify and apply strategies to maximize the scientific output of a large amount of data, and formally define and publish new standard methods for multi-lambda statistical and timing analysis, to serve as points of reference for future works; (b) initiate an ambitious numerical code for the variable emission from a relativistic jet from a stellar-mass compact object; (c) apply the above techniques and codes to a large amount of data, placing unprecedented constraints to the physics of jets, and comparing the jet properties in black holes and neutron stars, ultimately answering the fundamental question about how the jet properties are influenced by the presence of a hard surface or an event horizon (and/or ergosphere), as well as by the presence of large-scale bipolar magnetic fields. I am one of the precursors in this field, which has already shown its large potential. I have built and am currently a leading member of a large international collaboration, which has acquired a large amount of data with the most diverse sets of observational facilities and data structure. The complexity of the field, together with its clear potential, demands a focussed and continuous effort, which I am planning to take. I will tackle the objective with a multi-disciplinary approach, working on observations, theory and numerical simulations, maximizing the scientific exploitation of the method. I have been hired recently by the host institution with a researcher permanent position, which guarantees my stability during the project and the feasibility of the project itself. As the topics of the proposed project nicely complement the present expertise at the host institution, the CIG funding will help me enourmously in integrating myself in the host institution.

Оригинален текст от CORDIS (на английски).

Участници

ISTITUTO NAZIONALE DI ASTROFISICA · ROMAКоординаторИталия