Probing the Formation and Evolution of Early-Type Galaxies: The SAURON Project

2002 ◽  
pp. 363-366
Author(s):  
E. Emsellem ◽  
Keyword(s):  
Early Type ◽  
Formation And Evolution

scholarly journals Compact Groups of Galaxies

1999 ◽  
Vol 186 ◽  
pp. 367-373
Author(s):  
P. Hickson
Keyword(s):  
Galaxy Evolution ◽  
Mass Velocity ◽  
Velocity Dispersion ◽  
Continuous Process ◽  
Physical Nature ◽  
Compact Groups ◽  
Early Type ◽  
Natural Explanation ◽  
Groups Of Galaxies ◽  
Formation And Evolution

This paper reviews some of the outstanding questions concerning compact groups of galaxies. These relate to the physical nature and dynamical status of the groups, their formation and evolution, and their role in galaxy evolution. The picture that emerges is that compact groups are generally physically dense systems, although often contaminated by optical projections. Their evolution is likely a continuous process of infall, interaction and merging. As new galaxies are added, and previous ones merge, the membership of the group evolves. I suggest that while the size of the group changes little, other physical properties such as total mass, gas mass, velocity dispersion, fraction of early-type galaxies increase with time. This picture is at least qualitatively consistent with observations and provides a natural explanation for the strongest correlations found in compact group samples.

scholarly journals The population of early-type galaxies at1 < z < 2- new clues on their formation and evolution

2009 ◽  
Vol 392 (2) ◽  
pp. 718-732 ◽  
Author(s):  
P. Saracco ◽  
M. Longhetti ◽  
S. Andreon
Keyword(s):  
Early Type ◽  
Formation And Evolution

scholarly journals Star formation in bulges from GALEX

2007 ◽  
Vol 3 (S245) ◽  
pp. 385-390
Author(s):  
Sukyoung K. Yi
Keyword(s):  
Star Formation ◽  
Young Stars ◽  
Star Formation History ◽  
Early Type ◽  
Limited Sample ◽  
Cluster Galaxies ◽  
Brightest Cluster Galaxies ◽  
Formation History ◽  
Formation And Evolution ◽  
Bulge Formation

AbstractEarly-type galaxies, considered as large bulges, have been found to have had a much-more-than-boring star formation history in recent years by the UV satellite GALEX. The most massive bulges, brightest cluster galaxies, appear to be relatively free of young stars. But smaller bulges, normal ellipticals and lenticulars, often show unambiguous sign of recent star formation in their UV flux. The fraction of such UV-bright bulges in the volume-limited sample climbs up to the staggering 30%. The bulges of spirals follow similar trends but a larger fraction showing signs of current and recent star formation. The implication on the bulge formation and evolution is discussed.

scholarly journals Field spheroid-dominated galaxies in a Λ-CDM Universe

2018 ◽  
Vol 614 ◽  
pp. A85 ◽  
Author(s):  
M. S. Rosito ◽  
S. E. Pedrosa ◽  
P. B. Tissera ◽  
V. Avila-Reese ◽  
I. Lacerna ◽  
...  
Keyword(s):  
Star Formation ◽  
Cold Dark Matter ◽  
Early Type ◽  
Mass Growth ◽  
Star Forming ◽  
Quenching Mechanisms ◽  
Formation And Evolution ◽  
Dynamical Properties ◽  
Open Question ◽  
Supernova Feedback

Context. Understanding the formation and evolution of early-type, spheroid-dominated galaxies is an open question within the context of the hierarchical clustering scenario, particularly in low-density environments. Aims. Our goal is to study the main structural, dynamical, and stellar population properties and assembly histories of field spheroid-dominated galaxies formed in a Λ-cold dark matter (Λ-CDM) scenario to assess to what extent they are consistent with observations. Methods. We selected spheroid-dominated systems from a Λ-CDM simulation that includes star formation (SF), chemical evolution, and supernova feedback. The sample is made up of 18 field systems with MStar ≲ 6 × 1010M⊙ that are dominated by the spheroid component. For this sample we estimated the fundamental relations of ellipticals and compared them with current observations. Results. The simulated spheroid galaxies have sizes that are in good agreement with observations. The bulges follow a Sersic law with Sersic indexes that correlate with the bulge-to-total mass ratios. The structural-dynamical properties of the simulated galaxies are consistent with observed Faber–Jackson, fundamental plane, and Tully–Fisher relations. However, the simulated galaxies are bluer and with higher star formation rates (SFRs) than the observed isolated early-type galaxies. The archaeological mass growth histories show a slightly delayed formation and more prominent inside-out growth mode than observational inferences based on the fossil record method. Conclusions. The main structural and dynamical properties of the simulated spheroid-dominated galaxies are consistent with observations. This is remarkable since our simulation has not been calibrated to match them. However, the simulated galaxies are blue and star-forming, and with later stellar mass growth histories compared to observational inferences. This is mainly due to the persistence of extended discs in the simulations. The need for more efficient quenching mechanisms able to avoid further disc growth and SF is required in order to reproduce current observational trends.

scholarly journals Formation and evolution of early-type galaxies: spectro-photometry from cosmo-chemo-dynamical simulations

2010 ◽  
Vol 518 ◽  
pp. A43 ◽  
Author(s):  
R. Tantalo ◽  
S. Chinellato ◽  
E. Merlin ◽  
L. Piovan ◽  
C. Chiosi
Keyword(s):  
Early Type ◽  
Dynamical Simulations ◽  
Formation And Evolution

scholarly journals The Cosmic Evolution of Early-type Galaxies

2006 ◽  
Vol 2 (S235) ◽  
pp. 350-354 ◽  
Author(s):  
Andrea Cimatti
Keyword(s):  
Early Type ◽  
Cosmic Evolution ◽  
Formation And Evolution ◽  
Mass Assembly

AbstractThe latest observational results on the formation and evolution of early-type galaxies are reviewed by focusing on the issues of mass assembly and downsizing scenario.

scholarly journals Mass dependent Evolution of Field Early-Type Galaxies Since z=1

2009 ◽  
Vol 5 (S262) ◽  
pp. 335-336
Author(s):  
Alexander Fritz ◽  
Inger Jørgensen ◽  
Ricardo P. Schiavon
Keyword(s):  
High Redshift ◽  
Galaxy Cluster ◽  
Early Type ◽  
Data Set ◽  
Redshift Galaxy ◽  
Slope Change ◽  
Formation And Evolution ◽  
Distant Field ◽  
Mass Dependent ◽  
Homogeneous Data

AbstractWe present the Fundamental Plane (FP) of field early-type galaxies at 0.5 < z < 1.0. Our project is a continuation of our efforts to understand the formation and evolution of early-type galaxies in different environments. The target galaxies were selected from the comprehensive and homogeneous data set of the Gemini/HST Galaxy Cluster Project. The distant field early-type galaxies follow a steeper FP relation compared to the local FP. The change in the slope of the FP can be interpreted as a mass-dependent evolution. Similar results have been found for cluster early-type galaxies in high redshift galaxy clusters at 0.8 < z <1. Therefore, the slope change of the FP appears to be independent of the environment of the galaxies.

scholarly journals Formation and Evolution of Early-type Galaxies

2007 ◽  
pp. 151-156
Author(s):  
C. Chiosi ◽  
E. Merlin
Keyword(s):  
Early Type ◽  
Formation And Evolution

scholarly journals Formation and evolution of early-type galaxies

2006 ◽  
Vol 457 (2) ◽  
pp. 437-453 ◽  
Author(s):  
E. Merlin ◽  
C. Chiosi
Keyword(s):  
Early Type ◽  
Formation And Evolution

scholarly journals Isolated and Interacting Galaxies: Simulations with GRAPE

2003 ◽  
Vol 208 ◽  
pp. 177-188 ◽  
Author(s):  
E. Athanassoula
Keyword(s):  
Angular Momentum ◽  
Mass Density ◽  
Interacting Galaxies ◽  
Early Type ◽  
Late Type ◽  
Disc Galaxy ◽  
Formation And Evolution

I present N-body simulations of isolated and interacting galaxies, made on GRAPE machines. In particular I discuss the formation and evolution of N-body bars and compare their properties to those of bars in early-type and late-type galactic discs. I argue that the halo can help the bar grow, contrary to previous beliefs, by taking positive angular momentum from it via its resonant stars. I then focus on the interaction and subsequent merging of a barred disc galaxy with a spheroidal satellite. The evolution depends strongly on the mass (density) of the satellite and may lead to its destruction or to the destruction of the bar.

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