scholarly journals Constraints on the Velocity Dispersion Function of Early‐Type Galaxies from the Statistics of Strong Gravitational Lensing

2005 ◽  
Vol 630 (2) ◽  
pp. 764-770 ◽  
Author(s):  
Kyu‐Hyun Chae
Keyword(s):  
Gravitational Lensing ◽  
Velocity Dispersion ◽  
Dispersion Function ◽  
Early Type ◽  
Strong Gravitational Lensing

scholarly journals Dark-Matter in Galaxies from Gravitational Lensing and Stellar Dynamics Studies

2009 ◽  
Vol 5 (H15) ◽  
pp. 74-74
Author(s):  
L. V. E. Koopmans
Keyword(s):  
Dark Matter ◽  
Mass Distribution ◽  
Density Profile ◽  
Gravitational Lensing ◽  
Total Mass ◽  
Stellar Dynamics ◽  
Early Type ◽  
Complementary Methods ◽  
Strong Gravitational Lensing

AbstractStrong gravitational lensing and stellar dynamics provide two complementary methods in the study of the mass distribution of dark matter in galaxies out to redshift of unity. They are particularly powerful in the determination of the total mass and the density profile of mass early-type galaxies on kpc to tens of kpc scales, and also reveal the presence of mass-substructure on sub-kpc scale. I will shortly discuss these topics in this review.

scholarly journals The Velocity Dispersion Function of Early‐Type Galaxies

2003 ◽  
Vol 594 (1) ◽  
pp. 225-231 ◽  
Author(s):  
Ravi K. Sheth ◽  
Mariangela Bernardi ◽  
Paul L. Schechter ◽  
Scott Burles ◽  
Daniel J. Eisenstein ◽  
...  
Keyword(s):  
Velocity Dispersion ◽  
Dispersion Function ◽  
Early Type

scholarly journals STRONG GRAVITATIONAL LENSING AND ITS COSMIC CONSTRAINTS

2013 ◽  
Vol 28 (14) ◽  
pp. 1350057 ◽  
Author(s):  
NANNAN WANG ◽  
LIXIN XU
Keyword(s):  
Cosmological Model ◽  
Gravitational Lensing ◽  
Velocity Dispersion ◽  
Model Space ◽  
Data Sets ◽  
Spatial Curvature ◽  
Strong Gravitational Lensing ◽  
Strong Lensing ◽  
Λcdm Model ◽  
Stellar Velocity

In this paper, we propose a new method to use the strong lensing data sets to constrain a cosmological model. By taking the ratio [Formula: see text] as cosmic observations, one can completely eliminate the uncertainty caused by the relation σSIS= fEσ0which characterizes the relation between the stellar velocity dispersion σ0and the velocity dispersion σSIS. Via our method, a relative tight constraint to the cosmological model space can be obtained, for the spatially flat ΛCDM model as an example [Formula: see text] in 3σ regions. And by using this method, one can also probe the nature of dark energy and the spatial curvature of our Universe.

scholarly journals The velocity dispersion function of early-type galaxies and its redshift evolution: the newest results from lens redshift test

2021 ◽  
Author(s):  
Shuaibo Geng ◽  
Shuo Cao ◽  
Yuting Liu ◽  
Tonghua Liu ◽  
Marek Biesiada ◽  
...  
Keyword(s):  
Velocity Dispersion ◽  
Cosmic Time ◽  
Dispersion Function ◽  
Gravitational Lenses ◽  
Early Type ◽  
Number Density ◽  
Redshift Distribution ◽  
Perfect Agreement ◽  
Galaxy Surveys ◽  
Early Type Galaxy

Abstract The redshift distribution of galactic-scale lensing systems provides a laboratory to probe the velocity dispersion function (VDF) of early-type galaxies (ETGs) and measure the evolution of early-type galaxies at redshift z ∼ 1. Through the statistical analysis of the currently largest sample of early-type galaxy gravitational lenses, we conclude that the VDF inferred solely from strong lensing systems is well consistent with the measurements of SDSS DR5 data in the local universe. In particular, our results strongly indicate a decline in the number density of lenses by a factor of two and a 20% increase in the characteristic velocity dispersion for the early-type galaxy population at z ∼ 1. Such VDF evolution is in perfect agreement with the ΛCDM paradigm (i.e., the hierarchical build-up of mass structures over cosmic time) and different from ”stellar mass-downsizing” evolutions obtained by many galaxy surveys. Meanwhile, we also quantitatively discuss the evolution of the VDF shape in a more complex evolution model, which reveals its strong correlation with that of the number density and velocity dispersion of early-type galaxies. Finally, we evaluate if future missions such as LSST can be sensitive enough to place the most stringent constraints on the redshift evolution of early-type galaxies, based on the redshift distribution of available gravitational lenses.

scholarly journals Finslerian MOND versus the strong gravitational lensing of the early-type galaxies

2013 ◽  
Vol 73 (8) ◽  
Author(s):  
Zhe Chang ◽  
Ming-Hua Li ◽  
Xin Li ◽  
Hai-Nan Lin ◽  
Sai Wang
Keyword(s):  
Gravitational Lensing ◽  
Early Type ◽  
Strong Gravitational Lensing

scholarly journals Strong gravitational lensing and the stellar IMF of early-type galaxies

2016 ◽  
Vol 459 (4) ◽  
pp. 3677-3692 ◽  
Author(s):  
Dominik Leier ◽  
Ignacio Ferreras ◽  
Prasenjit Saha ◽  
Stéphane Charlot ◽  
Gustavo Bruzual ◽  
...  
Keyword(s):  
Gravitational Lensing ◽  
Early Type ◽  
Strong Gravitational Lensing

scholarly journals Strong gravitational lensing by Kerr and Kerr-Newman black holes

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
Tien Hsieh ◽  
Da-Shin Lee ◽  
Chi-Yong Lin
Keyword(s):  
Black Holes ◽  
Gravitational Lensing ◽  
Strong Gravitational Lensing

scholarly journals The merger-driven evolution of massive early-type galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 62-66
Author(s):  
Carlo Cannarozzo ◽  
Carlo Nipoti ◽  
Alessandro Sonnenfeld ◽  
Alexie Leauthaud ◽  
Song Huang ◽  
...  
Keyword(s):  
Mass Velocity ◽  
Selection Criteria ◽  
Velocity Dispersion ◽  
Ex Situ ◽  
Scaling Relations ◽  
Early Type ◽  
History Of ◽  
Kinematic Properties ◽  
Shed Light

AbstractThe evolution of the structural and kinematic properties of early-type galaxies (ETGs), their scaling relations, as well as their stellar metallicity and age contain precious information on the assembly history of these systems. We present results on the evolution of the stellar mass-velocity dispersion relation of ETGs, focusing in particular on the effects of some selection criteria used to define ETGs. We also try to shed light on the role that in-situ and ex-situ stellar populations have in massive ETGs, providing a possible explanation of the observed metallicity distributions.

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