Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 494, Issue 3, Pages 3616-3626Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa948
Keywords
accretion, accretion discs; methods: numerical; galaxies: active
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [17H01102, 16K05309, 18K03710, 18H04592]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) as a priority issue (Elucidation of the fundamental laws and evolution of the Universe)
- Science and Technology Facilities Council (STFC) [ST/P000541/1]
- National Science Foundation [NSF PHY17-48958]
- STFC [ST/P000541/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [18H04592] Funding Source: KAKEN
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Based on recent X-ray observations, ultrafast outflows from supermassive black holes are expected to have enough energy to dramatically affect their host galaxy but their launch and acceleration mechanisms are not well understood. We perform two-dimensional radiation hydrodynamics simulations of UV line-driven disc winds in order to calculate the mass-loss rates and kinetic power in these models. We develop a new iterative technique that reduces the mass accretion rate through the inner disc in response to the wind mass-loss. This makes the inner disc less UV bright, reducing the wind power compared to previous simulations which assumed a constant accretion rate with radius. The line-driven winds in our simulations are still extremely powerful, with around half the supplied mass accretion rate being ejected in the wind for black holes with mass 10(8)-10(10) M-circle dot accreting at L/L-Edd = 0.5-0.9. Our results open up the way for estimating the growth rate of supermassive black hole and evaluating the kinetic energy ejected into the interstellar medium (active galactic nuclei feedback) based on a physical model of line-driven disc winds.
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