UV spectropolarimetry with Polstar: protoplanetary disks

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作者
John P. Wisniewski
Andrei V. Berdyugin
Svetlana V. Berdyugina
William C. Danchi
Ruobing Dong
René D. Oudmaijer
Vladimir S. Airapetian
Sean D. Brittain
Ken Gayley
Richard Ignace
Maud Langlois
Kellen D. Lawson
Jamie R. Lomax
Evan A. Rich
Motohide Tamura
Jorick S. Vink
Paul A. Scowen
机构
[1] George Mason University,Department of Physics and Astronomy
[2] University of Turku,Tuorla Observatory, Department of Physics and Astronomy
[3] Leibniz-Institut für Sonnenphysik,Department of Physics and Astronomy
[4] NASA GSFC,School of Physics and Astronomy
[5] University of Victoria,CNRS, ENS, UCBL
[6] University of Leeds,Department of Physics and Astronomy
[7] Clemson University,Physics Department
[8] University of Iowa,Department of Astronomy
[9] East Tennessee State University,undefined
[10] Observatoire de Lyon,undefined
[11] University of Oklahoma,undefined
[12] United States Naval Academy,undefined
[13] University of Michigan,undefined
[14] NAOJ,undefined
[15] Armagh Observatory and Planetarium,undefined
来源
关键词
Ultraviolet astronomy (1736); Ultraviolet telescopes (1743); Space telescopes (1547); Spectropolarimetry(1973); Protoplanetary disks (1300); Circumstellar matter (241); Circumstellar disks (235); Exoplanet formation (492); Instruments: Polstar; NASA: MIDEX;
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摘要
Polstar is a proposed NASA MIDEX mission that carries a high resolution UV spectropolarimeter capable of measure all four Stokes parameters onboard a 60 cm telescope. The mission has been designed to pioneer the field of time-domain UV spectropolarimetry. Time domain UV spectropolarimetry offers the best resource to determine the geometry and physical conditions of protoplanetary disks from the stellar surface to <5 AU. We detail two key objectives that a dedicated time domain UV spectropolarimetry survey, such as that enabled by Polstar or a similar mission concept, could achieve: 1) Test the hypothesis that magneto-accretion operating in young planet-forming disks around lower-mass stars transitions to boundary layer accretion in planet-forming disks around higher mass stars; and 2) Discriminate whether transient events in the innermost regions of planet-forming disks of intermediate mass stars are caused by inner disk mis-alignments or from stellar or disk emissions.
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