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THE 2014 ALMA LONG BASELINE CAMPAIGN: AN OVERVIEW
Partnership, ALMA,Fomalont, E. B.,Vlahakis, C.,Corder, S.,Remijan, A.,Barkats, D.,Lucas, R.,Hunter, T. R.,Brogan, C. L.,Asaki, Y.,Matsushita, S.,Dent, W. R. F.,Hills, R. E.,Phillips, N.,Richards, A. M IOP Publishing 2015 ASTROPHYSICAL JOURNAL LETTERS - Vol.808 No.1
Dust properties across the CO snowline in the HD 163296 disk from ALMA and VLA observations
Guidi, G.,Tazzari, M.,Testi, L.,de Gregorio-Monsalvo, I.,Chandler, C. J.,Pé,rez, L.,Isella, A.,Natta, A.,Ortolani, S.,Henning, Th.,Corder, S.,Linz, H.,Andrews, S.,Wilner, D.,Ricci, L.,Carpenter, Springer-Verlag 2016 Astronomy and astrophysics Vol.588 No.-
The Millimeter Continuum Size-Frequency Relationship in the UZ Tau E Disk
Tripathi, Anjali,Andrews, Sean M.,Birnstiel, Tilman,Chandler, Claire J.,Isella, Andrea,Pé,rez, Laura M.,Harris, R. J.,Ricci, Luca,Wilner, David J.,Carpenter, John M.,Calvet, N.,Corder, S. A.,Del American Astronomical Society 2018 The Astrophysical journal Vol.861 No.1
<P>We 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 proportional to nu(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 (similar to 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 similar to 30%-60%. filling fraction in the inner disk (r less than or similar to 20 au), they can also explain the observed spatial gradient in the UZ Tau E disk spectrum.</P>