Downsizing of star-forming galaxies by gravitational processes
نویسندگان
چکیده
منابع مشابه
Downsizing of Star-forming Galaxies Explained by Gravitational Processes
There is a trend that lower mass galaxies form stars at later epochs. This downsizing of star-forming galaxies has been attributed to hydrodynamical or radiative feedback processes that regulate star formation. However, here we explain the downsizing by gravitational processes alone, in the bottom-up scenario where galaxies evolve from subgalactic-scale objects. Within a region of the initial d...
متن کاملDownsizing of star-forming galaxies by gravitational processes
Context. There is observed a trend that a lower mass galaxy forms stars at a later epoch. This downsizing of star-forming galaxies has been attributed to hydrodynamical or radiative feedback processes that regulate star formation. Aims. We explain the downsizing by gravitational processes alone, in the bottom-up scenario where galaxies evolve from subgalactic-scale objects. Methods. Using the t...
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Less massive galaxies form stars at later epochs. This downsizing of galaxy formation is explained by gravitational processes alone, in the framework of bottom-up scenario where galaxies evolve from subgalactic structures. Within a region that is destined to evolve into a less massive galaxy, subgalactic-scale fluctuation is of a smaller amplitude. The formation of subgalactic structures, i.e.,...
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Star complexes are the largest globular regions of star formation in galaxies. If there is a spiral density wave, nuclear ring, tidal arm, or other welldefined stellar structure, then gravitational instabilities in the gaseous component produce giant cloud complexes with a spacing of about three times the width. These gas complexes form star complexes, giving the familiar beads on a string of s...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20065604