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UniSDyn SIGNED

Building up a Unified Theory of Stellar Dynamos

Total Cost €

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EC-Contrib. €

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Partnership

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 UniSDyn project word cloud

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

attacks    inactive    accretion    cosmic    view    magnetic    engines    fusion    unisdyn    forming    industry    majority    dynamo    dynamos    apparent    averaging    simulations    arise    vigorous    incorporating    plan    prompt    turbulent    unify    claim    turbulence    star    measured    full    tools    variety    combustion    universe    reveals    requiring    longitude    theories    toolbox    disk    behavior    ubiquitous    descriptions    coefficients    incomplete    theory    models    solar    transport    suite    itself    global    stellar    sustain    reactors    butterfly    astrophysical    reveal    systematic    special    data    structure    becomes    migration    constructed    exhibit    rotators    active    objects    cyclic    convection    sunspots    stars    emergence    hosting    rotating    sun    diagram    property    famous    reached    serve    direct    chaos    observations    region    action    tested    laboratories    coherent    search    magnetism    resolve    equatorward    rapid    galactic    astrophysics   

Project "UniSDyn" data sheet

The following table provides information about the project.

Coordinator
AALTO KORKEAKOULUSAATIO SR 

Organization address
address: OTAKAARI 1
city: ESPOO
postcode: 2150
website: http://www.aalto.fi/en/

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
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 Coordinator Country Finland [FI]
 Project website https://www.mps.mpg.de/solar-stellar-magnetic-activity/erc-unisdyn
 Total cost 1˙964˙687 €
 EC max contribution 1˙964˙687 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2018-COG
 Funding Scheme ERC-COG
 Starting year 2019
 Duration (year-month-day) from 2019-05-01   to  2024-04-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    AALTO KORKEAKOULUSAATIO SR FI (ESPOO) coordinator 1˙023˙062.00
2    MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV DE (MUENCHEN) participant 941˙625.00

Map

 Project objective

Magnetic fields are ubiquitous in the universe. The special property of cosmic magnetism is that, in the majority of objects hosting magnetic fields, those fields are organized, such that some meaningful averaging can reveal global structure and systematic behavior. In the Sun, averaging over longitude reveals the equatorward migration of the emergence region of the sunspots, forming the famous butterfly diagram. Further, vigorous turbulence is present in a wide variety of astrophysical systems, and yet they still exhibit organized magnetic fields. These observations prompt the search for a theory to explain how order can arise and sustain itself in such chaos. We claim that the available theories are incomplete, especially in the case of solar-like stars which becomes apparent if we view the Sun as one star among many. We propose a coherent plan of advancement in which each theory shall be tested by requiring it also to explain the cyclic dynamo action seen in more active rapid rotators.

UNISDYN project attacks these very problems with novel simulations and data analysis tools. Our path to resolve them is to enhance the state-of-the-art stellar dynamo models with the relevant descriptions of the turbulent processes. This goal is reached in three steps. (i) We will produce improved convection dynamo simulations to serve as laboratories from which (ii) the turbulent transport coefficients are directly measured with a novel test methods suite. (iii) Finally, global dynamo models incorporating the turbulent effects in full are constructed based on (i) and (ii) results. These results will allow us to unify stellar dynamo theory for solar-like inactive and rapidly rotating active stars. The developed toolbox has direct applications in other fields of astrophysics, such as accretion and galactic disk dynamos, and industry, such as combustion engines and fusion reactors.

 Publications

year authors and title journal last update
List of publications.
2019 Elizabeth M. Cole-Kodikara, Maarit J. Käpylä, Jyri J. Lehtinen, Thomas Hackman, Ilya V. Ilyin, Nikolai Piskunov, Oleg Kochukhov
Spot evolution on LQ Hya from 2006–2017: temperature maps based on SOFIN and FIES data
published pages: A120, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201935729
Astronomy & Astrophysics 629 2020-02-19
2019 S. Nikbakhsh, E. I. Tanskanen, M. J. Käpylä, T. Hackman
Differences in the solar cycle variability of simple and complex active regions during 1996–2018
published pages: A45, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201935486
Astronomy & Astrophysics 629 2020-02-19
2020 Nishant K. Singh, Harsha Raichur, Maarit J. Käpylä, Matthias Rheinhardt, Axel Brandenburg, Petri J. Käpylä
f -mode strengthening from a localised bipolar subsurface magnetic field
published pages: 196-212, ISSN: 0309-1929, DOI: 10.1080/03091929.2019.1653461
Geophysical & Astrophysical Fluid Dynamics 114/1-2 2020-02-19
2019 M. Viviani, M. J. Käpylä, J. Warnecke, P. J. Käpylä, M. Rheinhardt
Stellar Dynamos in the Transition Regime: Multiple Dynamo Modes and Antisolar Differential Rotation
published pages: 21, ISSN: 1538-4357, DOI: 10.3847/1538-4357/ab3e07
The Astrophysical Journal 886/1 2020-02-19

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