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dc.contributor.authorWisniewski, John P.
dc.contributor.authorKowalski, Adam F.
dc.contributor.authorDavenport, James R. A.
dc.contributor.authorSchneider, Glenn
dc.contributor.authorGrady, Carol A.
dc.contributor.authorHebb, Leslie
dc.contributor.authorLawson, Kellen D.
dc.contributor.authorAugereau, Jean-Charles
dc.contributor.authorBoccaletti, Anthony
dc.contributor.authorBrown, Alexander
dc.contributor.authorDebes, John H.
dc.contributor.authorGaspar, Andras
dc.contributor.authorHenning, Thomas K.
dc.contributor.authorHines, Dean C.
dc.contributor.authorKuchner, Marc J.
dc.contributor.authorLagrange, Anne-Marie
dc.contributor.authorMilli, Julien
dc.contributor.authorSezestre, Elie
dc.contributor.authorStark, Christopher C.
dc.contributor.authorThalmann, Christian
dc.date.accessioned2019-10-25T22:19:44Z
dc.date.available2019-10-25T22:19:44Z
dc.date.issued2019-09-20
dc.identifier.citationWisniewski, J. P., Kowalski, A. F., Davenport, J. R., Schneider, G., Grady, C. A., Hebb, L., ... & Debes, J. H. (2019). High-fidelity Imaging of the Inner AU Mic Debris Disk: Evidence of Differential Wind Sculpting?. The Astrophysical Journal Letters, 883(1), L8.en_US
dc.identifier.issn2041-8205
dc.identifier.doi10.3847/2041-8213/ab40bf
dc.identifier.urihttp://hdl.handle.net/10150/634861
dc.description.abstractWe present new high-fidelity optical coronagraphic imagery of the inner similar to 50 au of AU Mic's edge-on debris disk using the BAR5 occulter of the Hubble Space Telescope Imaging Spectrograph (HST/STIS) obtained on 2018 July 26-27. This new imagery reveals that "feature A," residing at a projected stellocentric separation of 14.2 au on the southeast side of the disk, exhibits an apparent "loop-like" morphology at the time of our observations. The loop has a projected width of 1.5 au and rises 2.3 au above the disk midplane. We also explored Transiting Exoplanet Survey Satellite photometric observations of AU Mic that are consistent with evidence of two starspot complexes in the system. The likely co-alignment of the stellar and disk rotational axes breaks degeneracies in detailed spot modeling, indicating that AU Mic's projected magnetic field axis is offset from its rotational axis. We speculate that small grains in AU Mic's disk could be sculpted by a time-dependent wind that is influenced by this offset magnetic field axis, analogous to co-rotating solar interaction regions that sculpt and influence the inner and outer regions of our own Heliosphere. Alternatively, if the observed spot modulation is indicative of a significant misalignment of the stellar and disk rotational axes, we suggest that the disk could still be sculpted by the differential equatorial versus polar wind that it sees with every stellar rotation.en_US
dc.description.sponsorshipSpace Telescope Science Institute (STScI) [GO-15219]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.rights© 2019. The American Astronomical Society.en_US
dc.titleHigh-fidelity Imaging of the Inner AU Mic Debris Disk: Evidence of Differential Wind Sculpting?en_US
dc.typeArticleen_US
dc.identifier.eissn2041-8213
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.contributor.departmentUniv Arizona, Dept Astronen_US
dc.identifier.journalASTROPHYSICAL JOURNAL LETTERSen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.volume883
dc.source.issue1
dc.source.beginpageL8
refterms.dateFOA2019-10-25T22:19:45Z


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