Can Bars be Destroyed by Central Mass Concentrations?
نویسندگان
چکیده
منابع مشابه
Can bars be destroyed by a central mass concentration? I Simulations
We study the effect of a central mass concentration (CMC) on the secular evolution of a barred disc galaxy. Unlike previous studies, we use fully self-consistent 3D N -body simulations with live haloes, which are known to be important for bar evolution. The CMC is introduced gradually, to avoid transients. In all cases where the mass of the CMC is of the order of, or more than, a few per cent o...
متن کاملThe Destruction of Bars by Central Mass Concentrations
More than two thirds of disk galaxies are barred to some degree. Many today harbor massive concentrations of gas in their centers, and some are known to possess supermassive black holes (SMBHs) and their associated stellar cusps. Previous theoretical work has suggested that a bar in a galaxy could be dissolved by the formation of a mass concentration in the center, although the precise mass and...
متن کاملThe Survival of Bars with Central Mass Concentrations
Many barred galaxies today harbor massive concentrations of gas in their centers, and some are known to possess supermassive black holes (SBHs) and their associated stellar cusps. Previous theoretical work has suggested that a bar in a galaxy could be dissolved by the formation of a mass concentration in the center, although the precise mass and degree of central concentration required is not w...
متن کاملThe life-time of galactic bars: central mass concentrations and gravity torques
Bars in gas-rich spiral galaxies are short-lived. They drive gas inflows through their gravity torques, and at the same time self-regulate their strength. Their robustness has been subject of debate, since it was thought that only the resulting central mass concentrations (CMCs) were weakening bars, and only relatively rare massive CMCs were able to completely destroy them. Through numerical si...
متن کاملDoes Diarrhoea Causes Cataract? Can Cataract be Prevented by Aspirin?
Loss of transparency of the lens is termed cataract which is one of the commonest causes of blindness throughout the world. This major health problem appears to be much commoner in many developing countries such as India and Pakistan, where it causes visual disability at a substantially earlier age and several hypotheses have been put forward to explain this higher prevalence in these areas. Re...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 2005
ISSN: 1539-2996
DOI: 10.1017/s1539299600015926