Turgay CAGLAR
















Nothing happens until something moves.

Albert Einstein

About Me

Turgay CAGLAR

High Energy Astrophysics

Hello, I am a young passionate researcher, and I study large-scale structures of the universe. My main interest is clusters of galaxies, particularly, ICM dynamics, merging process and evolution of clusters of galaxies. In addition, I study X-ray sources from clusters of galaxies, in particular, galaxy evolution in clusters of galaxies, AGNs and XRBs. I have been mostly working with X-ray data from XMM-Newton and Chandra, but I also work with Suzaku, ASCA and NuStar X-ray data. Finally, I work with the largest AGN sample to understand the famous black hole mass - stellar velocity dispersion relation.

Here, you may find my recent research interests, the list of publications and my Curriculum Vitae.









Research Interests





Black Hole Mass - Stellar Velocity Dispersion Relation


For the last twenty years, a growing body of evidence has shown that the empirical black hole mass (MBH) - stellar velocity dispersion (σ★) relation is a fundamental correlation with a relatively small intrinsic scatter. Luckily, the existence of such relation allows us to determine black hole masses of many galaxies in where it is not possible to estimate MBH dynamically. Even though inactive galaxies mostly lie at the MBH - σ★ relation, AGN samples tend to show offsets from it. In this study, I have been trying to explain the main reason for this offset using observational and semi-analytical techniques.





Environmental Dependencies


Clusters of galaxies are the largest structural entities of the universe, and they are formed from gravitational collapses. The purpose of this study is to understand the influence of the environment on the evolution of galaxies. There is an open question whether clustering process suppress or trigger X-ray emission of member galaxies. Therefore, I study nearby galaxy clusters to address this question.

Galaxy Cluster Mergers

Cosmological models predict that small structures are formed first, then, large-scale structures are formed by merging with other systems. Interestingly, these mergers are still ongoing events on small and large scales. Such huge events like galaxy cluster mergers are one of the most energetic events of the universe. In these events, the kinetic energy of plasma is converted into thermal energy resulting in a heating of materials surrounding the cluster vicinity. In this project, I concentrate on understanding physical mechanisms that occurred by dynamical merge activities.












Contact

Turgay CAGLAR

Department of Astronomy
Leiden University
Netherlands
Call: +31 (6) 11 40 40 89
caglar@strw.leidenuniv.nl