Massive stars: their birth sites and distribution
نویسندگان
چکیده
منابع مشابه
Massive Stars: Their Birth Sites and Distribution
The stellar IMF has been found to be an invariant Salpeter power-law (α = 2.35) above about 1M⊙, but at the same time a massive star typically has more than one companion. This constrains the possible formation scenarios of massive stars, but also implies that the true, binary-star corrected stellar IMF could be significantly steeper than Salpeter, α > 2.7. A significant fraction of all OB star...
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Cloud environment is thought to play a critical role in determining the mechanism of formation of massive stars. In this contribution we review the physical characteristics of the environment around recently formed massive stars. Particular emphasis is given to recent high angular resolution observations which have improved our knowledge of the physical conditions and kinematics of compact regi...
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In the present-day universe, it appears that most, and perhaps all, massive stars are born in star clusters. It also appears that all star clusters contain stars drawn from an approximately universal initial mass function, so that almost all rich young star clusters contain massive stars. In this review I discuss the physical processes associated with both massive star formation and with star c...
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Due to their short lifetimes but their enormous energy release in all stages of their lives massive stars are the major engines for the comic matter circuit. They affect not only their close environment but are also responsible to drive mass flows on galactic scales. Recent 2D models of radiation-driven and wind-blown Hii regions are summarized which explore the impact of massive stars to the i...
متن کاملHow Massive Single Stars End their Life
How massive stars die – what sort of explosion and remnant each produces – depends chiefly on the masses of their helium cores and hydrogen envelopes at death. For single stars, stellar winds are the only means of mass loss, and these are chiefly a function of the metallicity of the star. We discuss how metallicity, and a simplified prescription for its effect on mass loss, affects the evolutio...
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ژورنال
عنوان ژورنال: New Astronomy Reviews
سال: 2004
ISSN: 1387-6473
DOI: 10.1016/j.newar.2003.11.007