|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Dual-Wavelength ALMA Observations of Dust Rings in Protoplanetary Disks | | Feng Long
; Paola Pinilla
; Gregory J. Herczeg
; Sean M. Andrews
; Daniel Harsono
; Doug Johnstone
; Enrico Ragusa
; Ilaria Pascucci
; David J. Wilner
; Nathan Hendler
; Jeff Jennings
; Yao Liu
; Giuseppe Lodato
; Francois Menard
; Gerrit van de Plas
; Giovanni Dipierro
; | | Date: |
4 Jun 2020 | | Abstract: | We present new Atacama Large Millimeter/submillimeter Array (ALMA)
observations for three protoplanetary disks in Taurus at 2.9,mm and
comparisons with previous 1.3,mm data both at an angular resolution of
$sim0.’’1$ (15,au for the distance of Taurus). In the single-ring disk DS
Tau, double-ring disk GO Tau, and multiple-ring disk DL Tau, the same rings are
detected at both wavelengths, with radial locations spanning from 50 to
120,au. To quantify the dust emission morphology, the observed visibilities
are modeled with a parametric prescription for the radial intensity profile.
The disk outer radii, taken as 95\% of the total flux encircled in the model
intensity profiles, are consistent at both wavelengths for the three disks.
Dust evolution models show that dust trapping in local pressure maxima in the
outer disk could explain the observed patterns. Dust rings are mostly
unresolved. The marginally resolved ring in DS Tau shows a tentatively narrower
ring at the longer wavelength, an observational feature expected from efficient
dust trapping. The spectral index ($alpha_{
m mm}$) increases outward and
exhibits local minima that correspond to the peaks of dust rings, indicative of
the changes in grain properties across the disks. The low optical depths
($ ausim$0.1--0.2 at 2.9,mm and 0.2--0.4 at 1.3,mm) in the dust rings
suggest that grains in the rings may have grown to millimeter sizes. The
ubiquitous dust rings in protoplanetary disks modify the overall dynamics and
evolution of dust grains, likely paving the way towards the new generation of
planet formation. | | Source: | arXiv, 2006.3120 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER