A Three-dimensional View of Turbulence: Constraints on Turbulent Motions in the HD 163296 Protoplanetary Disk Using DCO+
By K. Flaherty, A. Hughes, Sanaea C. Rose, Jacob B. Simon, C. Qi, S. Andrews, Á. Kóspál, D. Wilner, E. Chiang, Philip Armitage and 1 more. 2017
205 citations recorded by the source corpus.
Gas kinematics are an important part of the planet formation process. Turbulence influences planetesimal growth and migration from the scale of submicron dust grains through gas-giant planets. Radio observations of resolved molecular line emission can directly measure this non-thermal motion and, taking advantage of the layered chemical structure of disks, different molecular lines can be combined to map the turbulence throughout the vertical extent of a protoplanetary disk. Here we present ALMA observations of three molecules (DCO+(3-2), C18O(2-1) and CO(2-1)) from the disk around HD 163296. We are able to place stringent upper limits (vturb < 0.06cs, <0.05cs, and <0.04cs for CO(2-1), C18O(2-1), and DCO+(3-2) respectively), corresponding to α ≲ 3 × 10−3, similar to our prior limit derived from CO(3-2). This indicates that there is little turbulence throughout the vertical extent of the disk, contrary to theoretical predictions based on the magnetorotational instability and gravitoturbulence. In modeling the DCO+ emission, we also find that it is confined to three concentric rings at 65.7 ± 0.9 au, , and 259 ± 1 au, indicative of a complex chemical environment.
Subfields: Astronomy and Astrophysics, Spectroscopy
View Paper: https://www.semanticscholar.org/paper/23ec932081480d95657343568fdfc4198817edbb
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
In Spectroscopy
Citations in the corpus
- Molecules with ALMA at Planet-forming Scales (MAPS). I. Program Overview and Highlights (2021, background): “…ionization, and kinematics of disk gas (some recent examples can be found in van der Marel et al. 2016; Dutrey et al. 2017; Miotello et al. 2017; Flaherty et al. 2017; Huang et al. 2018b; Pinte et al. 2018a; Calahan et al. 2021a, but see also the reviews above for references to earlier work).”
- Turbulence in the TW Hya Disk (2018, methodology): “Additionally, in Flaherty et al. (2017), when fitting DCO+(3-2) and C18O(2-1), we explicitly include free parameters for the DCO+ and CO abundance respectively and find that it does not strongly bias our ability to constrain turbulence to <0.05cs. Flaherty et al. (2017) also point out, in the…”
- A Kinematical Detection of Two Embedded Jupiter-mass Planets in HD 163296 (2018, methodology): “Relative residuals from a Keplerian curve assuming 2.3 Msun and i = 47.7 ◦, appropriate for HD 163296 (Flaherty et al. 2015, 2017) are shown for the three transitions in the top row of Fig.”
- Kinematic Evidence for an Embedded Protoplanet in a Circumstellar Disk (2018, methodology): “We set the artificial viscosity in the code in order to obtain an average Shakura & Sunyaev (1973) viscosity of 10−3 (Lodato & Price 2010), in agreement with the upper limits found by Flaherty et al. (2015, 2017).”