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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.

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

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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