A Caltech Library Service

On the Commonality of 10-30AU Sized Axisymmetric Dust Structures in Protoplanetary Disks

Zhang, Ke and Bergin, Edwin A. and Blake, Geoffrey A. and Cleeves, L. Ilsedore and Hogerheijde, Michiel and Salinas, Vachail and Schwarz, Kamber R. (2016) On the Commonality of 10-30AU Sized Axisymmetric Dust Structures in Protoplanetary Disks. Astrophysical Journal Letters, 818 (1). Art. No. L16. ISSN 2041-8205.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


An unsolved problem in step-wise core-accretion planet formation is that rapid radial drift in gas-rich protoplanetary disks should drive millimeter-/meter-sized particles inward to the central star before large bodies can form. One promising solution is to confine solids within small-scale structures. Here, we investigate dust structures in the (sub)millimeter continuum emission of four disks (TW Hya, HL Tau, HD 163296, and DM Tau), a sample of disks with the highest spatial resolution Atacama Large Millimeter/submillimeter Array observations to date. We retrieve the surface brightness distributions using synthesized images and fitting visibilities with analytical functions. We find that the continuum emission of the four disks is ~axisymmetric but rich in 10–30 AU-sized radial structures, possibly due to physical gaps, surface density enhancements, or localized dust opacity variations within the disks. These results suggest that small-scale axisymmetric dust structures are likely to be common, as a result of ubiquitous processes in disk evolution and planet formation. Compared with recent spatially resolved observations of CO snow lines in these same disks, all four systems show enhanced continuum emission from regions just beyond the CO condensation fronts, potentially suggesting a causal relationship between dust growth/trapping and snow lines.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Zhang, Ke0000-0002-0661-7517
Bergin, Edwin A.0000-0003-4179-6394
Blake, Geoffrey A.0000-0003-0787-1610
Cleeves, L. Ilsedore0000-0003-2076-8001
Schwarz, Kamber R.0000-0002-6429-9457
Additional Information:© 2016 American Astronomical Society. Received 2015 December 12; accepted 2016 January 19; published 2016 February 8. This work was supported by funding from the National Science Foundation, grants AST-1344133 (INSPIRE) and AST-1514670. The authors thank John Monnier for discussions on model-fitting approaches to visibility data. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc., This paper makes use of the following ALMA data sets: ADS/JAO. ALMA#2011.0.00015.SV, ADS/JAO.ALMA#2013.1.00198.S and ADS/JAO.ALMA #2013.1.01268.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ.
Funding AgencyGrant Number
Subject Keywords:protoplanetary disks; stars: pre-main sequence; techniques: interferometric
Issue or Number:1
Record Number:CaltechAUTHORS:20160307-120443528
Persistent URL:
Official Citation:Ke Zhang et al 2016 ApJ 818 L16
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65129
Deposited By: Ruth Sustaita
Deposited On:07 Mar 2016 21:26
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page