Results 301 to 310 of about 75,563 (322)
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2020
Our knowledge of the Milky Way has been deeply renewed since a dozen years, following the results of the astrometric satellite HIPPARCOS, and those of large stellar surveys. Many concepts thought to be well established disappeared, to be replaced by others going towards a larger complexity: in particular, the discovery of radial migrations of stars has
Francoise Combes +2 more
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Our knowledge of the Milky Way has been deeply renewed since a dozen years, following the results of the astrometric satellite HIPPARCOS, and those of large stellar surveys. Many concepts thought to be well established disappeared, to be replaced by others going towards a larger complexity: in particular, the discovery of radial migrations of stars has
Francoise Combes +2 more
openaire +2 more sources
Formation and Evolution of the Milky Way
2003The problem of understanding the formation of the Galaxy is part of the problem of explaining galaxy formation in general. In particular, we should try to understand the relative importance of mergers and dissipative collapse in the formation of all galaxies, and whether the observational information about our Galaxy is enough to explain the timescales
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Chemical evolution in the Milky Way Disk
AIP Conference Proceedings, 2006Classical models of galactic evolution predict a smooth rise in heavy‐element abundance (metallicity) with time. We test this prediction with a new, large and unbiased sample of long‐lived stars in the solar neighbourhood and find that several of the key tests fail to support the classical predictions.
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The Formation and Early Evolution of the Milky Way Galaxy
Science, 2000Recent observations indicate that the Milky Way may have formed by aggregation of gas and stars from a reservoir of preexisting small galaxies in the local universe. The process probably began more than 12 billion years ago with material of different original angular momentum following two separate evolutionary lines, one into the slowly rotating halo ...
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Radial migration and chemical evolution in the Milky Way
Astronomische Nachrichten, 2016AbstractThe role of radial migration on the chemical evolution of the Milky Way is studied with semi‐analytical models of disk evolution, using several new/updated ingredients and parametrized prescriptions for blurring and churning. It is found that radial migration impacts on several properties of the local disk (shape and dispersion of the age ...
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Effect of chemical composition of black tea infusion on the color of milky tea
Food Research International, 2021Jie-Qiong Wang +2 more
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