Radiation pressure feedback in the formation of massive stars

Details Radiation pressure feedback in the formation of massive stars Radiation pressure feedback in the formation of massive stars

2011-02-17

arxiv.org/abs/1102.3567v1

Bulletin de la Societe Royale des Sciences de Liege, 2011 vol. 80 pp. 211-216

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 3 figures, Proceedings of the 39th Liege International Astrophysical Colloquium: The multi-wavelength view of Hot, Ma

Scientific paper

We investigate the radiation pressure feedback in the formation of massive stars in 1, 2, and 3D radiation hydrodynamics simulations of the collapse of massive pre-stellar cores. In contrast to previous research, we consider frequency dependent stellar radiation feedback, resolve the dust sublimation front in the vicinity of the forming star down to 1.27 AU, compute the evolution for several 10^5 yrs covering the whole accretion phase of the forming star, and perform a comprehensive survey of the parameter space. The most fundamental result is that the formation of a massive accretion disk in slowly rotating cores preserves a high anisotropy in the radiation field. The thermal radiation escapes through the optically thin atmosphere, effectively diminishing the radiation pressure feedback onto the accretion flow. Gravitational torques in the self-gravitating disk drive a sufficiently high accretion rate to overcome the residual radiation pressure. Simultaneously, the radiation pressure launches an outflow in the bipolar direction, which grows in angle with time and releases a substantial fraction of the initial core mass from the star-disk system. Summarized, for an initial core mass of 60, 120, 240, and 480 Msol these mechanisms allow the star to grow up to 28.2, 56.5, 92.6, and at least 137.2 Msol respectively.

Affiliated with

Also associated with

No associations

Rating

Radiation pressure feedback in the formation of massive stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radiation pressure feedback in the formation of massive stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiation pressure feedback in the formation of massive stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-380546