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Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc

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Price, Daniel J, Cuello, Nicolás, Pinte, Christophe, Mentiplay, Daniel, Casassus, Simon, Christiaens, Valentin, Kennedy, Grant M., Cuadra, Jorge, Sebastian Perez, M., Marino, Sebastian, Armitage, Philip J., Zurlo, Alice, Juhasz, Attila, Ragusa, Enrico, Laibe, Guillaume and Lodato, Giuseppe (2018) Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc. Monthly Notices of the Royal Astronomical Society, 477 (1). pp. 1270-1284. doi:10.1093/mnras/sty647 ISSN 1365-2966.

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Official URL: http://dx.doi.org/10.1093/mnras/sty647

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Abstract

We present 3D hydrodynamical models of the HD 142527 protoplanetary disc, a bright and well-studied disc that shows spirals and shadows in scattered light around a 100 au gas cavity, a large horseshoe dust structure in mm continuum emission, together with mysterious fast radial flows and streamers seen in gas kinematics. By considering several possible orbits consistent with the observed arc, we show that all of the main observational features can be explained by one mechanism – the interaction between the disc and the observed binary companion. We find that the spirals, shadows, and horseshoe are only produced in the correct position angles by a companion on an inclined and eccentric orbit approaching periastron – the ‘red’ family from Lacour et al. Dust–gas simulations show radial and azimuthal concentration of dust around the cavity, consistent with the observed horseshoe. The success of this model in the HD 142527 disc suggests other mm-bright transition discs showing cavities, spirals, and dust asymmetries may also be explained by the interaction with central companions.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Protoplanetary disks, Planetary systems, Accretion (Astrophysics), Double stars
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Oxford University Press
ISSN: 1365-2966
Official Date: 11 June 2018
Dates:
DateEvent
11 June 2018Published
15 March 2018Available
6 March 2018Accepted
Volume: 477
Number: 1
Page Range: pp. 1270-1284
DOI: 10.1093/mnras/sty647
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 6 June 2018
Date of first compliant Open Access: 6 June 2018
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
RC130007 Millenium CentersUNSPECIFIED
FT13010034Australian Research Councilhttp://dx.doi.org/10.13039/501100000923
DP130102078 Australian Research Councilhttp://dx.doi.org/10.13039/501100000923
DP180104235Australian Research Councilhttp://dx.doi.org/10.13039/501100000923
UNSPECIFIEDAustralia. GovernmentUNSPECIFIED
UNSPECIFIEDMonash Universityhttp://dx.doi.org/10.13039/501100001779
3170680Fondo Nacional de Desarrollo Científico y Tecnológicohttp://dx.doi.org/10.13039/501100002850
Research FellowshipRoyal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDComisión Nacional de Investigación Científica y Tecnológicahttp://dx.doi.org/10.13039/501100002848
1141175Fondo Nacional de Desarrollo Científico y Tecnológicohttp://dx.doi.org/10.13039/501100002850
PFB0609Fondo Nacional de Desarrollo Científico y Tecnológicohttp://dx.doi.org/10.13039/501100002850
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