期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 430, 期 1, 页码 686-698出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts668
关键词
galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: formation; galaxies: high-redshift; galaxies: starburst
The link between massive red galaxies in the local Universe and star-forming galaxies at high redshift is investigated with a semi-analytic model that has proven successful in many ways, e. g. explaining the galaxy colour-magnitude bimodality and the stellar mass-age relation for red-sequence galaxies. The model is used to explore the processes that drive star formation in different types of galaxies as a function of stellar mass and redshift. We find that most z = 2-4 star-forming galaxies with M-* > 10(10) M-circle dot evolve into red-sequence galaxies. Also, most of the massive galaxies on the red sequence today have passed through a phase of intense star formation at z > 2. Specifically, similar to 90 per cent of today's red galaxies with M-* > 10(11) M-circle dot were fed during this phase by cold streams including minor mergers. Gas-rich major mergers are rare and the effects of merger-driven starbursts are ephemeral. On the other hand, major mergers are important in powering the most extreme starbursts. Gas-rich mergers also explain the tail of intermediate-mass red galaxies that form relatively late, after the epoch of peak star formation. In two-thirds of the currently red galaxies that had an intense star formation event at z < 1, this event was triggered by a merger.
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