Browsing Fizik by Author "Ercan, E. Nihal."

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  • A study of non-cool core galaxy clusters and the feedback from their central active galactic nuclei 
    Tümer, Ayşegül. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    The study of the brightest cluster galaxy (BCG) coronae of non-cool core (NCC) galaxy clusters and their central active galactic nuclei (AGN) is crucial for the under standing of the BCG’s role on galaxy cluster evolution ...
  • Accretion discs around compact objects 
    Ekşi, K.Yavuz. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1999., 1999.)
    Accretion onto a compact object is the process that is thought to power unexpectedly intense radiation of some astrophysical objects like Active Galactic Nuclei and X-Ray Binaries. A similar process is known to exist in ...
  • AE AQR :|a DQ her type cataclysmic variable binary system 
    Erkut, M. Hakan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1998., 1998.)
    AE Aquarii, a DQ Her type Cataclysmic Variable X-ray binary system, is observed with rosat, PSPC in the energy range 0.1-2.4 keV with a total of 5.74 hr period. As a result of spectral and timing analyses of the ROSAT X-ray ...
  • Chemical enrichment history and gas mass fraction of the galaxy cluster abell 3112 
    Ezer, Cemile. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Clusters of galaxies are the largest concentrations of con ned matter in the Universe. Their deep potential well locks all metals produced by stars and galaxies within the intra-cluster medium. The spatial distribution of ...
  • Dynamical structure analysis of five binary galaxy clusters observed with XMM-Newton x-ray observatory 
    Beygu, Burcu. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Clusters of galaxies are thought to form by accretion of galaxies along the cosmic filaments, and merging of clusters formed earlier. Observations and hydrodynamic simulations show the strong effects of mergers on physical ...
  • Fermi-lat and chandra studies of shell like supernova remnants 
    Bozkurt, Mustafa. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    Supernova Remnants (SNRs) have long been considered to be the primary source of galactic cosmic rays (CRs) having energies below the so called \knee", 1015 eV. CRs are accelerated by SNRs which transfer some of their ...
  • The relations between the x-ray spectral parameters of gamma-ray bursts 
    Kilerci, Ece. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Gamma-Ray Bursts (GRBs) are the most energetic explosions in the universe. They are thought to arise from massive stellar explosions or mergers of compact objects. As a result of these processes a black hole and an acretion ...
  • XMM-Newton data analysis of isolated radio-quiet neutron stars 1E 1207.4-5209, RX J0002+6246, RX J0822-4300, CXOU J185238.6+004020 
    Ankay, Arzu. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    In this thesis, data analysis of X-ray dim radio quiet X-ray pulsar 1E 1207.4- 5209 and RX J0002+6246, RX J0822-4300, CXOU J185238.6+00402 which have similar observational characteristics as 1E 1207.4-5209 are represented ...
  • XMN-Newton observations of toothbrush cluster of galaxies 
    Kara, Sinancan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    Clusters of galaxies are the largest gravitationally bound systems in the Uni verse. Their immense gravitational potential holds 10’s to 100’s bright galaxies and also an intracluster medium (ICM) surrounding them. ICM ...

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