Simulations of radiation-driven winds from Keplerian discs

Sananda Raychaudhuri, Mukesh K. Vyas, Indranil Chattopadhyay

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We study the ejection of winds from thin accretion discs around stellar mass black holes and the time evolution of these winds in the presence of radiation field generated by the accretion disc. Winds are produced by radiation, thermal pressure, and the centrifugal force of the disc. The winds are found to be mildly relativistic, with speeds reaching up to terminal speeds of 0.1 for accretion rate of 4 in Eddington units. We show that the ejected matter gets its rotation by transporting angular momentum from the disc to the wind. We also show that the radiation drag affects the accretion disc winds in a very significant manner. Not only that the terminal speeds are reduced by an order of magnitude due to radiation drag, but we also show that the non-linear effect of radiation drag can mitigate the formation of the winds from the matter ejected by the accretion disc. As radiation drag reduces the velocity of the wind, the mass outflow rate is reduced in its presence as well.

Original languageEnglish
Pages (from-to)4850-4860
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
StatePublished - 1 Mar 2021

Bibliographical note

Publisher Copyright:
© 2021 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.


  • ISM: jets and outflows
  • accretion, accretion discs
  • black hole physics
  • radiation: dynamics


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