A Look at Three Different Scenarios for Bulge Formation

A Look At Three Different Scenarios for Bulge Formation

In this paper, we present three qualitatively different scenarios for bulge formation: a secular evolution model in which bulges form after disks and undergo several central starbursts, a primordial collapse model in which bulges and disks form simultaneously, and an early bulge formation model in which bulges form prior to disks. We normalize our models to the local z = 0 observations of de Jo...

A Different Look at Peer-Reviewing of Articles

A look at the formation of ISIS from the perspective of post-modern terrorism

Terrorism has been divided in several directions. One of the most important conceptual divisions of terrorism is its division into three types of traditional, modern and postmodern which, while possessing common characteristics, share their own characteristics. Traditional terrorism is the most elementary type of terrorism that is limited to the borders of a land and region; modern terrorism br...

Bulge Formation

The currently discussed theories of bulge formation are reviewed, including the pri-mordial scenario, where bulges form rapidly and then accrete disks, the secular scenario, where bulges are formed by dynamical evolution of disks through bars and galaxy interactions , and some combinations of both, where formation of bulges and disks are more continuous and interleaved. The various scenarios ma...

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