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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Massive star formation via torus accretion: the effect of photoionization feedback

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Sartorio, N. S. [1] ; Vandenbroucke, B. [2] ; Falceta-Goncalves, D. [3, 1] ; Wood, K. [2] ; Keto, E. [4]
Total Authors: 5
[1] INPE, Div Astrofisr, Av Astronautas 1-758, Sao Jose Dos Campos, SP - Brazil
[2] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife - Scotland
[3] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Rua Arlindo Bettio 1000, BR-03828000 Sao Paulo, SP - Brazil
[4] Harvard Smithsonian Ctr Astrophys, 160 Garden St, Cambridge, MA 02420 - USA
Total Affiliations: 4
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 486, n. 4, p. 5171-5183, JUL 2019.
Web of Science Citations: 1

The formation of massive stars is a longstanding problem. Although a number of theories of massive star formation exist, ideas appear to converge to a disc-mediated accretion scenario. Here, we present radiative hydrodynamic simulations of a star-accreting mass via a disc embedded in a torus, We use a Monte Carlo based radiation hydrodynamics code to investigate the impaci that ionizing radiation has on the torus. Ionized regions in the torus midplane are found to be either gravitationally trapped or in pressure-driven expansion depending On whether or not. the size of the ionized region exceeds a critical radius, Trapped Fin regions in the torus plane allow accretion to progress, while expanding H u regions disrupt the accretion torus preventing the central star from aggregating more mass, thereby setting the star's tinal mass. We obtain constraints for the luminosities and torus densities that lead to both scenarios. (AU)

FAPESP's process: 13/10559-5 - Investigation of high energy and plasma astrophysics phenomena: theory, numerical simulations, observations, and instrument development for the Cherenkov Telescope Array (CTA)
Grantee:Elisabete Maria de Gouveia Dal Pino
Support type: Research Projects - Thematic Grants