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نمایش تعداد 1-10 از 41

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    On the Stability of a Galactic Disk in Modified Gravity 

    نوع: Journal Paper
    نویسنده : محمود روشن المه جق; شهرام عباسی; Mahmood Roshan; Shahram Abbassi
    سال: 2015
    خلاصه:

    catalog of spiral galaxies in order to compare the local stability criteria. In this perspective, we have compared MOG with Newtonian gravity and investigated the possible and detectable differences between these theories....

    Evolution of spiral galaxies in modified gravity 

    نوع: Journal Paper
    نویسنده : محمود روشن المه جق; Sohrab Rahvar; Mahmood Roshan; Sohrab Rahvar
    سال: 2019
    خلاصه:

    We study the evolution of simulated disk galaxies in the context of a nonlocal theory of gravity. In this theory, the appearance of the dark matter problem in cosmology and astrophysics is a manifestation of the nonlocality of the gravitational...

    On The Gravitational Stability Of The Maclaurin Disl 

    نوع: Journal Paper
    نویسنده : محمود روشن المه جق; شهرام عباسی; Habib Khosroshahi; Mahmood Roshan; Shahram Abbassi
    سال: 2016
    خلاصه:

    We study the global gravitational stability of a gaseous self-gravitating Maclaurin disk in the absence of a halo.

    Further, we replace Newtonian gravity with the specific modified gravity theory known as MOG in the ...

    Stellar Bar Evolution in the Absence of Dark Matter Halo 

    نوع: Journal Paper
    نویسنده : محمود روشن المه جق; Mahmood Roshan
    سال: 2018
    خلاصه:

    We study the stellar bar growth in high-resolution numerical galaxy models with and without dark matter halos. In all models, the galactic disk is exponential, and the halos are rigid or live Plummer spheres. More specifically, when there is no dark...

    Ultra-low Power Autonomous Power Management System with Effective Impedance Matching for RF Energy Harvesting 

    نوع: Conference Paper
    ناشر: IEEE
    سال: 2014

    Independent Component Analysis for the objective classification of globular clusters of the galaxy NGC 5128 

    نوع: Journal Paper
    ناشر: Elsevier Science
    سال: 2013

    (پایداری قرصهای کهکشانی در نظریه تعمیم یافته گرانش) On the stability of galactic disks in MOG 

    نوع: Conference Paper
    نویسنده : محمود روشن المه جق; Mahmood Roshan
    سال: 2015
    خلاصه:

    in Newtonian gravity. In other words, MOG predicts higher

    star formation rates for outer parts of disk galaxies. In order to check the global stability of self-

    gravitating disks, we use N-body simulations. For some simple and idealized galaxy...

    AGN Activity and IGM Heating in Fossil Cluster RX J1416.4+2315 

    نوع: Journal Paper
    نویسنده : H. Miraghaei; H. G. Khosroshahi; C. Sengupta; S. Raychaudhury; N. N. Jetha; شهرام عباسی; Shahram Abbassi
    سال: 2015
    خلاصه:

    We study active galactic nucleus (AGN) activity in the fossil galaxy cluster RX J1416.4+2315. Radio observations

    were carried out using the Giant Metrewave Radio Telescope at two frequencies, 1420 and 610 MHz. A weak radio...

    Bondi accretion in the finite luminous region of elliptical galaxies 

    نوع: Journal Paper
    نویسنده : مریم صمدی مجرد; سحر زنگنه; شهرام عباسی; Maryam Samadimojarad; sahar zanganeh; Shahram Abbassi
    سال: 2019
    خلاصه:

    The classical Bondi model is adopted to study accretion on to the finite luminous region around the central massive black hole (MBH) in an elliptical galaxy. Unlike Bondi, we define the boundary conditions at a certain finite radius (rf) instead...

    Practical Aspects of Testing Methods for Thermal Interface Materials 

    نوع: Conference Paper
    نویسنده : Saums, David L.
    ناشر: IEEE
    سال: 2014
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