[en] We present five morphological and kinematic criteria to aid in asserting the binary nature of a protoplanetary disc, based on 3D hydrodynamical simulations of circumbinary discs post-processed with Monte Carlo radiative transfer. We find that circumbinary discs may be identified by (i) a central cavity, (ii) spiral arms both in and outside of their central cavities, (iii) non-localized perturbations in their iso-velocity curves, (iv) asymmetry between the lines of maximum speed of the blueshifted and redshifted wings, and (v) asymmetry between the area of the blueshifted and redshifted wings. We provide quantitative metrics for the last two criteria that can be used, in conjunction with the morphological criteria, to signal whether a protoplanetary disc is likely to be a circumbinary disc.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Calcino, Josh; Los Alamos National Laboratory, Theoretical Division
Price, Daniel J.; Monash University, School of Astrophysics
Pinte, Christophe; Monash University, School of Astrophysics, Institute de Planetologie et d'Astrophysique de Grenoble
Garg, Himanshi; Monash University, School of Astrophysics
Norfolk, Brodie J.; ANU, Research School of Astronomy and Astrophysics
Christiaens, Valentin ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Li, Hui; Los Alamos National Laboratory, Theoretical Division
Teague, Richard; Harvard Smithsonian Center for Astrophysics
Language :
English
Title :
Observational signatures of circumbinary discs - I. Kinematics