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X-ray spectroscopy evidence for plasma shell formation in experiments modeling accretion columns in young stars

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dc.contributor.authorFilippov, E. D.
dc.contributor.authorRevet, G.
dc.contributor.authorChen, S. N.
dc.contributor.authorKhiar, B.
dc.contributor.authorSkobelev, I. Y.
dc.contributor.authorPikuz, S. A.
dc.contributor.authorСкобелев, Игорь Юрьевич
dc.date.accessioned2024-11-21T12:11:12Z
dc.date.available2024-11-21T12:11:12Z
dc.date.issued2019
dc.description.abstract© 2019 Author(s).Recent achievements in laboratory astrophysics experiments with high-power lasers have allowed progress in our understanding of the early stages of star formation. In particular, we have recently demonstrated the possibility of simulating in the laboratory the process of the accretion of matter on young stars [G. Revet et al., Sci. Adv. 3, e1700982 (2017)]. The present paper focuses on X-ray spectroscopy methods that allow us to investigate the complex plasma hydrodynamics involved in such experiments. We demonstrate that we can infer the formation of a plasma shell, surrounding the accretion column at the location of impact with the stellar surface, and thus resolve the present discrepancies between mass accretion rates derived from X-ray and optical-radiation astronomical observations originating from the same object. In our experiments, the accretion column is modeled by having a collimated narrow (1 mm diameter) plasma stream first propagate along the lines of a large-scale external magnetic field and then impact onto an obstacle, mimicking the high-density region of the stellar chromosphere. A combined approach using steady-state and quasi-stationary models was successfully applied to measure the parameters of the plasma all along its propagation, at the impact site, and in the structure surrounding the impact region. The formation of a hot plasma shell, surrounding the denser and colder core, formed by the incoming stream of matter is observed near the obstacle using X-ray spatially resolved spectroscopy.
dc.identifier.citationX-ray spectroscopy evidence for plasma shell formation in experiments modeling accretion columns in young stars / Filippov, E.D. [et al.] // Matter and Radiation at Extremes. - 2019. - 4. - № 6. - 10.1063/1.5124350
dc.identifier.doi10.1063/1.5124350
dc.identifier.urihttps://www.doi.org/10.1063/1.5124350
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85072667297&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000512299700005
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/18717
dc.relation.ispartofMatter and Radiation at Extremes
dc.titleX-ray spectroscopy evidence for plasma shell formation in experiments modeling accretion columns in young stars
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue6
oaire.citation.volume4
relation.isAuthorOfPublication1738b158-eb9a-44c7-a2a1-277d74c0e461
relation.isAuthorOfPublication.latestForDiscovery1738b158-eb9a-44c7-a2a1-277d74c0e461
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
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