The Millimeter Continuum Size–Frequency Relationship in the UZ Tau E Disk

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dc.citation.articleNumber64en_US
dc.citation.journalTitleThe Astrophysical Journalen_US
dc.citation.volumeNumber861en_US
dc.contributor.authorTripathi, Anjalien_US
dc.contributor.authorAndrews, Sean M.en_US
dc.contributor.authorBirnstiel, Tilmanen_US
dc.contributor.authorChandler, Claire J.en_US
dc.contributor.authorIsella, Andreaen_US
dc.contributor.authorPérez, Laura M.en_US
dc.contributor.authorHarris, R.J.en_US
dc.contributor.authorRicci, Lucaen_US
dc.contributor.authorWilner, David J.en_US
dc.contributor.authorCarpenter, John M.en_US
dc.contributor.authorCalvet, N.en_US
dc.contributor.authorCorder, S.A.en_US
dc.contributor.authorDeller, A.T.en_US
dc.contributor.authorDullemond, C.P.en_US
dc.contributor.authorGreaves, J.S.en_US
dc.contributor.authorHenning, Th.en_US
dc.contributor.authorKwon, W.en_US
dc.contributor.authorLazio, J.en_US
dc.contributor.authorLinz, H.en_US
dc.contributor.authorTesti, L.en_US
dc.date.accessioned2018-11-01T14:28:11Zen_US
dc.date.available2018-11-01T14:28:11Zen_US
dc.date.issued2018en_US
dc.description.abstractWe present high spatial resolution observations of the continuum emission from the young multiple star system UZ Tau at frequencies from 6 to 340 GHz. To quantify the spatial variation of dust emission in the UZ Tau E circumbinary disk, the observed interferometric visibilities are modeled with a simple parametric prescription for the radial surface brightnesses at each frequency. We find evidence that the spectrum steepens with radius in the disk, manifested as a positive correlation between the observing frequency and the radius that encircles a fixed fraction of the emission (R eff ∝ ν 0.34±0.08). The origins of this size–frequency relation are explored in the context of a theoretical framework for the growth and migration of disk solids. While that framework can reproduce a similar size–frequency relation, it predicts a steeper spectrum than that observed. Moreover, it comes closest to matching the data only on timescales much shorter (≤1 Myr) than the putative UZ Tau age (~2–3 Myr). These discrepancies are direct consequences of the rapid radial drift rates predicted by models of dust evolution in a smooth gas disk. One way to mitigate that efficiency problem is to invoke small-scale gas pressure modulations that locally concentrate drifting solids. If such particle traps reach high-continuum optical depths at 30–340 GHz with a ~30%–60% filling fraction in the inner disk (r lesssim 20 au), they can also explain the observed spatial gradient in the UZ Tau E disk spectrum.en_US
dc.identifier.citationTripathi, Anjali, Andrews, Sean M., Birnstiel, Tilman, et al.. "The Millimeter Continuum Size–Frequency Relationship in the UZ Tau E Disk." <i>The Astrophysical Journal,</i> 861, (2018) IOP: https://doi.org/10.3847/1538-4357/aac5d6.en_US
dc.identifier.digitalTripathi_2018en_US
dc.identifier.doihttps://doi.org/10.3847/1538-4357/aac5d6en_US
dc.identifier.urihttps://hdl.handle.net/1911/103269en_US
dc.language.isoengen_US
dc.publisherIOPen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleThe Millimeter Continuum Size–Frequency Relationship in the UZ Tau E Disken_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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