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Impact of Magnetic field on Emergent solar spectra

Total Cost €


EC-Contrib. €






 IMagE project word cloud

Explore the words cloud of the IMagE project. It provides you a very rough idea of what is the project "IMagE" about.

progress    spatial    influence    faculae    positions    controversy    measured    amplitude    l1    3d    physical    day    synthesis    radiative    ingredient    strengths    line    controversial    time    local    timescales    models    solar    properly    sun    mechanisms    mhd    ultraviolet    simplifications    device    spots    resolving    irradiance    data    maiden    equilibrium    blanketing    thermodynamic    efficient    varies    analyze    brightness    structure    physics    computed    surface    modifies    climate    resolution    longer    modeling    valid    terrestrial    wavelengths    dark    simulations    variability    atmosphere    made    magnetohydrodynamic    relied    instance    variations    missions    departures    aditya    disc    magnetic    components    sunrise    atmospheres    lte    bright    breakthrough    modulate    until    incorporation    extremely    realistic    accurate    transfer    evolve    appearing    observations    spectra    mission    uv    indian    computationally    computations    image    grid    validated   

Project "IMagE" data sheet

The following table provides information about the project.


Organization address
city: Munich
postcode: 80539

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Total cost 159˙460 €
 EC max contribution 159˙460 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2017
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2019
 Duration (year-month-day) from 2019-01-01   to  2020-12-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Solar brightness varies at all measured timescales and wavelengths, and can affect terrestrial atmosphere and climate. Variations on timescales longer than a day are driven by the solar surface magnetic activity. Solar magnetic field modifies the structure of the solar atmosphere and its radiative properties, appearing at the surface as dark spots and bright faculae. These features continuously evolve with time and modulate solar brightness. Although significant progress has been made in modeling solar brightness variations, their amplitude in the ultraviolet (UV) range remains controversial. IMagE aims at resolving this controversy.

A crucial ingredient of the irradiance models are brightness spectra of the various magnetic components. Spectra that have been used until now relied on a number of simplifications that are not valid in the UV. To properly account for the physical mechanisms which influence the solar variability in the UV, including the line blanketing and departures from local thermodynamic equilibrium (LTE), non-LTE computations of spectra from realistic 3D magnetohydrodynamic (MHD) atmospheres are needed. This is computationally extremely challenging. IMagE will exploit state-of-the-art MHD and radiative transfer simulations to device a method for efficient, yet accurate, synthesis of the non-LTE brightness spectra of the different magnetic components. This method will be validated against high spatial resolution observations of the Sun. Incorporation of the spectra computed with this method in the physics-based irradiance models will lead to a breakthrough in our understanding of the solar UV irradiance variability. The grid of non-LTE spectra for different magnetic field strengths and solar disc positions produced within IMagE can also be used to analyze the data from future missions, for instance SUNRISE III and the maiden Indian solar mission Aditya-L1.

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The information about "IMAGE" are provided by the European Opendata Portal: CORDIS opendata.

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