The Role of Environment on the Formation of Early-Type Galaxies
arXiv:1002.0835 · doi:10.1111/j.1365-2966.2010.16436.x
Abstract
(Abridged) We present a detailed study of the stellar populations of a volume-limited sample of early-type galaxies from SDSS, across a range of environments -- defined as the mass of the host dark matter halo. The stellar populations are explored through the SDSS spectra, via projection onto a set of two spectral vectors determined from Principal Component Analysis. We find the velocity dispersion of the galaxy to be the main driver behind the different star formation histories of early-type galaxies. However, environmental effects are seen to play a role (although minor). Galaxies populating the lowest mass halos have stellar populations on average ~1Gyr younger than the rest of the sample. The fraction of galaxies with small amounts of recent star formation is also seen to be truncated when occupying halos more massive than 3E13Msun. The sample is split into satellite and central galaxies for a further analysis of environment. Satellites are younger than central galaxies of the same stellar mass. The younger satellite galaxies in 6E12Msun halos have stellar populations consistent with the central galaxies found in the lowest mass halos of our sample (i.e. 1E12Msun). This result is indicative of galaxies in lower mass halos being accreted into larger halos.
11 pages, 10 figures. Accepted for publication in MNRAS
References in corpus (17)
- A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
- Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
- Star formation efficiency in galaxy interactions and mergers: a statistical study
- The Importance of Satellite Quenching for the Build-Up of the Red Sequence of Present Day Galaxies
- Ages and metallicities of early-type galaxies in the SDSS: new insight into the physical origin of the colour-magnitude and the Mg2-sigmaV relations
- Galaxy Groups in the SDSS DR4: II. halo occupation statistics
- Environmental Effects on Satellite Galaxies: The Link Between Concentration, Size and Colour Profile
- Stellar populations of early-type galaxies in different environments II. Ages and metallicities
- The role of minor mergers in the recent star formation history of early-type galaxies
- Downsizing by Shutdown in Red Galaxies
- Stellar Ages and Metallicities of Central and Satellite Galaxies: Implications for Galaxy Formation and Evolution
- Adding Environmental Gas Physics to the Semi-Analytic Method for Galaxy Formation: Gravitational Heating
- The star formation history of early-type galaxies as a function of mass and environment
- Evolution in the structural properties of early-type Brightest Cluster Galaxies at small lookback time and dependence on the environment
- The Rise and Fall of Galaxy Activity in Dark Matter Haloes
- Environmental dependence of AGN activity in the supercluster A901/2
- Decoding the spectra of SDSS early-type galaxies: New indicators of age and recent star formation
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- The SAMI Galaxy Survey: Global stellar populations on the size-mass plane
- SPIDER - III. Environmental Dependence of the Fundamental Plane of Early-type Galaxies
- SPIDER X - Environmental effects in central and satellite early-type galaxies through the stellar fossil record
- M/L and Color Evolution for A Deep Sample of M* Cluster Galaxies at z~1: The Formation Epoch and the Tilt of the Fundamental Plane
- The SAMI Galaxy Survey: Stellar population radial gradients in early-type galaxies
- The hELENa project - I. Stellar populations of early-type galaxies linked with local environment and galaxy mass
- Early-type galaxies at z~1.3. II. Masses and ages of early-type galaxies in different environments and their dependence on stellar population model assumptions
- The VIMOS Public Extragalactic Redshift Survey (VIPERS): spectral classification through Principal Component Analysis
- Dissecting the Red Sequence. IV. The Role of Truncation in the Two-Dimensional Family of Early-Type Galaxy Star Formation Histories
- On the Radial Stellar Content of Early-Type Galaxies as a Function of Mass and Environment
- The Influence of Galaxy Environment on the Stellar Initial Mass Function of Early-Type Galaxies
- Early-Type Galaxy Star Formation Histories in Different Environments
- Age-dating the Tully-Fisher relation at moderate redshift
- Stellar kinematics and populations out to 1.5 effective radius in the elliptical galaxy NGC4636
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- And the winner is: galaxy mass
- Does environment affect the star formation histories of early-type galaxies?
- Evaluating quenching in cosmological simulations of galaxy formation with spectral covariance in the optical window