Elliptical Galaxies
نویسندگان
چکیده
منابع مشابه
Cold Gas and Star Formation in Elliptical Galaxies
Elliptical galaxies outside dense clusters are observed to contain small amounts (relative to spiral galaxies) of cold interstellar gas. This review discusses the atomic gas, the molecular gas, and the dust in elliptical galaxies. Field elliptical galaxies contain about 0.01 to 0.1 of the cold interstellar matter content of spiral galaxies of similar luminosity, and support a low level of star ...
متن کاملBinary Stellar Population Synthesis Study of Elliptical Galaxies
We determine relative stellar ages and metallicities mainly for about 80 elliptical galaxies in low and high density environments via the latest binary stellar population (BSP) synthesis model and test a latest hierarchical formation model of elliptical galaxies which adopted the new ΛCDM cosmology for the first time. The stellar ages and metallicities of galaxies are estimated from two high-qu...
متن کاملThe Absence of Passively Evolving Ellipticals in Deep Optical and Near-Infrared Surveys
The traditional view of elliptical galaxies has been that they formed in a single, rapid burst of star formation at high redshift, and have evolved quiescently since that time. In opposition to this traditional view is evidence that at least some elliptical galaxies have formed from the merger of two disk galaxies. What has not been clear is which process is the dominant formation mechanism for...
متن کاملStellar Kinematics of Merging Galaxies: Clues to the Origins of Elliptical Galaxies
There is signiÐcant evidence suggesting that mergers of galaxies produce elliptical galaxies. To determine whether the known kinematic properties of elliptical galaxies are consistent with those of their suggested progenitors, we have examined the stellar velocity dispersion in 11 nuclear regions within starbursting infrared-luminous galaxies. All of these galaxies are in some stage of merging....
متن کاملProperties of Early-type, Dry Galaxy Mergers and the Origin of Massive Elliptical Galaxies
The luminosity dependence of kinematical and isophotal properties of elliptical galaxies is investigated using numerical simulations of galaxy merging, combined with semi-analytical models of hierarchical structure formation. Mergers of spiral galaxies as the only formation mechanism for elliptical galaxies can neither reproduce the kinematical and photometric properties of very massive ellipti...
متن کاملProperties of Early-type, Dry Galaxy Mergers and the Origin of Massive, Slowly Rotating, Pressure Supported Elliptical Galaxies
The luminosity dependence of kinematical and isophotal properties of elliptical galaxies is investigated using numerical simulations of galaxy merging, combined with semi-analytical models of hierarchical structure formation. Mergers of spiral galaxies as the only formation mechanism for elliptical galaxies can neither reproduce the kinematical and photometric properties of very massive ellipti...
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