منابع مشابه
Probing the Early Evolution of Young High-Mass Stars
Near-infrared imaging surveys of high-mass star-forming regions reveal an amazingly complex interplay between star formation and the environment (Churchwell et al. 2006; Alvarez et al. 2004). By means of nearIR spectroscopy the embedded massive young stars can be characterized and placed in the context of their birth site. However, so far spectroscopic surveys have been hopelessly incomplete, h...
متن کاملEvolution of Low Mass Stars
We describe the evolution of low mass (1.5 < M=M < 0:02) stars and brown dwarfs starting from the hydrostatic phases of pre{main sequence contraction and evolving along the deuterium and lithium burning to reach the hydrogen burning main sequence or the brown dwarf degenerate cooling. With the help of new models computed by us, which we describe to the community taking advantage of this occasio...
متن کاملStructure and evolution of low-mass stars
We present extensive calculations of the structure and the evolution of low-mass stars in the range 0.07-0.8M , for metallicities −2.0 ≤ [M/H] ≤ 0.0. These calculations are based on the most recent description of the microphysics characteristic of these dense and cool objects and on the latest generation of grainless non-grey atmosphere models. We examine the evolution of the different mechanic...
متن کاملThe rotational evolution of low-mass stars
We summarise recent progress in the understanding of the rotational evolution of low-mass stars (here defined as solar mass down to the hydrogen burning limit) both in terms of observations and modelling. Wide-field imaging surveys on moderate-size telescopes can now efficiently derive rotation periods for hundreds to thousands of open cluster members, providing unprecedented sample sizes which...
متن کاملFirst Stars . I . Evolution without mass loss
The first generation of stars was formed from primordial gas. Numerical simulations suggest that the first stars were predominantly very massive, with typical masses M ≥ 100M⊙. These stars were responsible for the reionization of the universe, the initial enrichment of the intergalactic medium with heavy elements, and other cosmological consequences. In this work, we study the structure of Zero...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1986
ISSN: 1539-2996
DOI: 10.1017/s1539299600006808