Downsizing by shutdown in red galaxies
نویسندگان
چکیده
منابع مشابه
Downsizing by Shutdown in Red Galaxies
We address the origin of the ‘downsizing’ of elliptical galaxies, according to which the stars in more massive galaxies formed earlier and over a shorter period than those in less massive galaxies. We show that this could be the natural result of a shutdown of star formation in dark matter haloes above a critical mass of ∼ 1012M⊙. This is demonstrated using a semi-analytic simulation of galaxy ...
متن کاملDownsizing 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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The study of PopI and PopII indicators in galaxies has a profound impact on our understanding of galaxy evolution. Their present (z = 0) ratio suggests that the star formation history of galaxies was primarily dictated by their global mass. Since 1989 Luis Carrasco and I spent most of our sleepless nights gathering Hα and near infrared surface photometry of galaxies in the local Universe and fo...
متن کاملMass downsizing and “top-down” assembly of early-type galaxies
Aims. We present a new analysis of the rest-frame B-band COMBO-17 and DEEP2 luminosity functions (LFs) of early-type galaxies (ETGs) as a function of luminosity and mass. Our aim is to place new stringent constraints on the evolution of ETGs since z ∼ 1. Methods. We correct the LF(z) data for the luminosity dimming assuming pure luminosity evolution. However, instead of relying on stellar popul...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2008
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2008.13562.x