A dust and gas cavity in the disc around CQ Tau revealed by ALMA - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2019

A dust and gas cavity in the disc around CQ Tau revealed by ALMA

M. Giulia Ubeira Gabellini
  • Function : Author
Anna Miotello
  • Function : Author
Stefano Facchini
  • Function : Author
Enrico Ragusa
  • Function : Author
Giuseppe Lodato
  • Function : Author
Leonardo Testi
  • Function : Author
Simon Bruderer
  • Function : Author
Nicolás T. Kurtovic
  • Function : Author
Sean Andrews
  • Function : Author
John Carpenter
  • Function : Author
Stuartt A. Corder
  • Function : Author
Giovanni Dipierro
  • Function : Author
Barbara Ercolano
  • Function : Author
Davide Fedele
  • Function : Author
Greta Guidi
  • Function : Author
Thomas Henning
  • Function : Author
Andrea Isella
  • Function : Author
Woojin Kwon
  • Function : Author
Hendrik Linz
  • Function : Author
Melissa Mcclure
  • Function : Author
Laura Perez
  • Function : Author
Luca Ricci
  • Function : Author
Giovanni Rosotti
  • Function : Author
Marco Tazzari
  • Function : Author
David Wilner
  • Function : Author

Abstract

The combination of high-resolution and sensitivity offered by ALMA is revolutionizing our understanding of protoplanetary discs, as their bulk gas and dust distributions can be studied independently. In this paper we present resolved ALMA observations of the continuum emission (λ = 1.3 mm) and CO isotopologues (12CO, 13CO, C18O, J = 2 - 1) integrated intensity from the disc around the nearby (d = 162 pc), intermediate-mass (M_{\star }=1.67 M_{\odot }) pre-main-sequence star CQ Tau. The data show an inner depression in continuum and in both 13CO and C18O emission. We employ a thermo-chemical model of the disc reproducing both continuum and gas radial intensity profiles, together with the disc spectral energy distribution. The models show that a gas inner cavity with size between 15 and 25 au is needed to reproduce the data with a density depletion factor between ∼10-1 and ∼10-3. The radial profile of the distinct cavity in the dust continuum is described by a Gaussian ring centred at R_dust=53 au and with a width of σ =13 au. Three-dimensional gas and dust numerical simulations of a disc with an embedded planet at a separation from the central star of {∼ }20 au and with a mass of {∼ } 6 - 9 M_Jup reproduce qualitatively the gas and dust profiles of the CQ Tau disc. However, a one-planet model appears not to be able to reproduce the dust Gaussian density profile predicted using the thermo-chemical modeling.
Fichier principal
Vignette du fichier
stz1138.pdf (6.66 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

insu-03703848 , version 1 (11-06-2023)

Identifiers

Cite

M. Giulia Ubeira Gabellini, Anna Miotello, Stefano Facchini, Enrico Ragusa, Giuseppe Lodato, et al.. A dust and gas cavity in the disc around CQ Tau revealed by ALMA. Monthly Notices of the Royal Astronomical Society, 2019, 486, pp.4638-4654. ⟨10.1093/mnras/stz1138⟩. ⟨insu-03703848⟩
43 View
9 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More