2D hydrodynamical simulations of Be star decretion disc formation through boundary layer effects

Clicks: 3
ID: 325036
2026
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal

Ranked #159 of 892 articles by views in monthly notices of the royal astronomical society

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 892 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Abstract Be stars are massive main-sequence stars rotating close to their breakup rate. They possess a decretion disc of material built up due to mass loss from the star, however, there is not a consensus to the mechanism responsible for the formation of the disc because of their sub-breakup spin rates. We present the first 2D hydrodynamical simulations of the formation of a Be star decretion disc from a rapidly rotating star due to boundary layer effects that reduce the rotation rate of the disc close to the star. In our simulations with a disc aspect ratio of h/r = 0.1, a decretion disc forms around a star rotating with $80~{{\ \rm per\ cent}}$ of the breakup rate, but fails when rotating at $70~{{\ \rm per\ cent}}$ of the breakup rate. For a thinner disc, a faster stellar spin may be needed to form a dynamically important decretion disc. We also demonstrate good agreement between 1D and 2D models. Although this work does not consider the presence of magnetic fields and the angular momentum transport is through viscosity, our results robustly show a Be star disc may be built up hydrodynamically through boundary layer effects, and may play an essential role in regulating the stellar spin.
Reference Key
openalex_W7170182356 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Madeline Overton, Zhaohuan Zhu, Rebecca G. Martin, J I A N Z E Dong
Journal monthly notices of the royal astronomical society
Year 2026
DOI
10.1093/mnras/stag1443
URL
https://doi.org/10.1093/mnras/stag1443
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.