Infall of gas as the formation mechanism of stars up to 20 times more massive than the Sun

Maria T. Beltrán (), Riccardo Cesaroni, Claudio Codella, Leonardo Testi, Ray S. Furuya and Luca Olmi
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Maria T. Beltrán: Universitat de Barcelona
Riccardo Cesaroni: Osservatorio Astrofisico di Arcetri
Claudio Codella: Istituto di Radioastronomia, INAF, Sezione di Firenze
Leonardo Testi: Osservatorio Astrofisico di Arcetri
Ray S. Furuya: Subaru Telescope, National Astronomical Observatory of Japan
Luca Olmi: Istituto di Radioastronomia, INAF, Sezione di Firenze

Nature, 2006, vol. 443, issue 7110, 427-429

Abstract: Stars in the making High-mass or OB-type stars can dominate the appearance and evolution of galaxies and certainly synthesize heavy elements and influence the interstellar medium via energetic winds and supernovae. But current models of star formation cannot explain their existence. Low-mass stars grow initially by accreting gas from the surrounding material. But for a star 10 times more massive than the Sun, the powerful stellar radiation is expected to inhibit accretion and limit the growth of its mass. The observation of an ammonia line towards a high-mass star forming region now provides support for the theory that high-mass stars form via nonspherical accretion: gas appears to be falling inwards towards a very young star of about 20 times the mass of the Sun.

Date: 2006
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DOI: 10.1038/nature05074

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