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Laboratory evidence for an asymmetric accretion structure upon slanted matter impact in young stars

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dc.contributor.authorBurdonov, K.
dc.contributor.authorRevet, G.
dc.contributor.authorBonito, R.
dc.contributor.authorArgiroffi, C.
dc.contributor.authorPikuz, S.
dc.date.accessioned2024-11-27T09:11:38Z
dc.date.available2024-11-27T09:11:38Z
dc.date.issued2020
dc.description.abstract© K. Burdonov et al. 2020.Aims. Investigating the process of matter accretion onto forming stars through scaled experiments in the laboratory is important in order to better understand star and planetary system formation and evolution. Such experiments can indeed complement observations by providing access to the processes with spatial and temporal resolution. A previous investigation revealed the existence of a two-component stream: a hot shell surrounding a cooler inner stream. The shell was formed by matter laterally ejected upon impact and refocused by the local magnetic field. That laboratory investigation was limited to normal incidence impacts. However, in young stellar objects, the complex structure of magnetic fields causes variability of the incident angles of the accretion columns. This led us to undertake an investigation, using laboratory plasmas, of the consequence of having a slanted accretion impacting a young star. Methods. Here, we used high power laser interactions and strong magnetic field generation in the laboratory, complemented by numerical simulations, to study the asymmetry induced upon accretion structures when columns of matter impact the surface of young stars with an oblique angle. Results. Compared to the scenario where matter accretes perpendicularly to the star surface, we observe a strongly asymmetric plasma structure, strong lateral ejecta of matter, poor confinement of the accreted material, and reduced heating compared to the normal incidence case. Thus, slanted accretion is a configuration that seems to be capable of inducing perturbations of the chromosphere and hence possibly influencing the level of activity of the corona.
dc.identifier.citationLaboratory evidence for an asymmetric accretion structure upon slanted matter impact in young stars / Burdonov, K. [et al.] // Astronomy and Astrophysics. - 2020. - 642. - 10.1051/0004-6361/202038189
dc.identifier.doi10.1051/0004-6361/202038189
dc.identifier.urihttps://www.doi.org/10.1051/0004-6361/202038189
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85093927835&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000581809400001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/22514
dc.relation.ispartofAstronomy and Astrophysics
dc.titleLaboratory evidence for an asymmetric accretion structure upon slanted matter impact in young stars
dc.typeArticle
dspace.entity.typePublication
oaire.citation.volume642
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
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