---
res:
  bibo_abstract:
  - 'A near-equal-mass binary black hole (BH) can clear a central cavity in a circumbinary
    accretion disc; however, previous works have revealed accretion streams entering
    this cavity. Here we use 2D hydrodynamical simulations to study the accretion
    streams and their periodic behaviour. In particular, we perform a suite of simulations,
    covering different binary mass ratios q = M2/M1 in the range 0.003 ≤ q ≤ 1. In
    each case, we follow the system for several thousand binary orbits, until it relaxes
    to a stable accretion pattern. We find the following results: (i) the binary is
    efficient in maintaining a low-density cavity. However, the time-averaged mass
    accretion rate into the cavity, through narrow coherent accretion streams, is
    suppressed by at most a factor of a few compared to a disc with a single BH with
    the same mass; (ii) for q ≳ 0.05, the accretion rate is strongly modulated by
    the binary, and depending on the precise value of q, the power spectrum of the
    accretion rate shows either one, two or three distinct periods; and (iii) for
    q ≲ 0.05, the accretion rate becomes steady, with no time variations. Most binaries
    produced in galactic mergers are expected to have q ≳ 0.05. If the luminosity
    of these binaries tracks their accretion rate, then a periodogram of their light
    curve could help in their identification, and to constrain their mass ratio and
    disc properties.@eng'
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Daniel J.
      foaf_name: D'Orazio, Daniel J.
      foaf_surname: D'Orazio
  - foaf_Person:
      foaf_givenName: Zoltán
      foaf_name: Haiman, Zoltán
      foaf_surname: Haiman
      foaf_workInfoHomepage: http://www.librecat.org/personId=7c006e8c-cc0d-11ee-8322-cb904ef76f36
  - foaf_Person:
      foaf_givenName: Andrew
      foaf_name: MacFadyen, Andrew
      foaf_surname: MacFadyen
  bibo_doi: 10.1093/mnras/stt1787
  bibo_issue: '4'
  bibo_volume: 436
  dct_date: 2013^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1365-2966
  - http://id.crossref.org/issn/0035-8711
  dct_language: eng
  dct_publisher: Oxford University Press@
  dct_title: Accretion into the central cavity of a circumbinary disc@
...