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

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dc.citation.articleNumber64
dc.citation.journalTitleThe Astrophysical Journal
dc.citation.volumeNumber861
dc.contributor.authorTripathi, Anjali
dc.contributor.authorAndrews, Sean M.
dc.contributor.authorBirnstiel, Tilman
dc.contributor.authorChandler, Claire J.
dc.contributor.authorIsella, Andrea
dc.contributor.authorPérez, Laura M.
dc.contributor.authorHarris, R.J.
dc.contributor.authorRicci, Luca
dc.contributor.authorWilner, David J.
dc.contributor.authorCarpenter, John M.
dc.contributor.authorCalvet, N.
dc.contributor.authorCorder, S.A.
dc.contributor.authorDeller, A.T.
dc.contributor.authorDullemond, C.P.
dc.contributor.authorGreaves, J.S.
dc.contributor.authorHenning, Th.
dc.contributor.authorKwon, W.
dc.contributor.authorLazio, J.
dc.contributor.authorLinz, H.
dc.contributor.authorTesti, L.
dc.date.accessioned2018-11-01T14:28:11Z
dc.date.available2018-11-01T14:28:11Z
dc.date.issued2018
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.
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.
dc.identifier.digitalTripathi_2018
dc.identifier.doihttps://doi.org/10.3847/1538-4357/aac5d6
dc.identifier.urihttps://hdl.handle.net/1911/103269
dc.language.isoeng
dc.publisherIOP
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.
dc.titleThe Millimeter Continuum Size–Frequency Relationship in the UZ Tau E Disk
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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