---
res:
  bibo_abstract:
  - "Aims. We investigate signatures of pressure extrema on global oscillations in
    discs.\r\n\r\nMethods. We used the framework of wave topology to establish a generalised
    local dispersion relation that includes pressure gradients. We highlight the influence
    of a previously unrecognised epicyclic–acoustic frequency, and we derive an analytical
    criterion for the existence of a branch of modes transiting between the inertial
    and the pressure bands, known as topological modes.\r\n\r\nResults. We find that
    pressure extrema consist of wave guides in which such topological modes propagate.
    The fundamental mode trapped at a pressure bump can propagate at any frequency,
    allowing it to resonate with any temporal forcing. Conversely, the fundamental
    mode associated with a pressure dip propagates at any vertical phase velocity.
    These specific features make them attractive candidates for future discoseismology.@eng"
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Armand
      foaf_name: Leclerc, Armand
      foaf_surname: Leclerc
      foaf_workInfoHomepage: http://www.librecat.org/personId=2a1fb1fc-f373-11ef-901a-87cee43a1217
  - foaf_Person:
      foaf_givenName: Guillaume
      foaf_name: Laibe, Guillaume
      foaf_surname: Laibe
  - foaf_Person:
      foaf_givenName: Elliot
      foaf_name: Lynch, Elliot
      foaf_surname: Lynch
  - foaf_Person:
      foaf_givenName: Nicolas
      foaf_name: Perez, Nicolas
      foaf_surname: Perez
  bibo_doi: 10.1051/0004-6361/202558428
  bibo_volume: 708
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0004-6361
  - http://id.crossref.org/issn/1432-0746
  dct_language: eng
  dct_publisher: EDP Sciences@
  dct_subject:
  - accretion
  - accretion disks
  - hydrodynamics
  - instabilities
  - waves
  - protoplanetary disks
  dct_title: Radial modes of pressure bumps and dips in astrophysical discs@
...