Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-11-09
Astrophys.Space Sci. 265 (1999) 417-424
Astronomy and Astrophysics
Astrophysics
8 pages, 2 figures, Proceedings of "Galaxy Evolution: Connecting the distant Universe with the local fossil record", Rencontre
Scientific paper
10.1023/A:1002138027767
Mass accretion is the key factor for evolution of galaxies. It can occur through secular evolution, when gas in the outer parts is driven inwards by dynamical instabilities, such as spirals or bars. This secular evolution proceeds very slowly when spontaneous, and can be accelerated when triggered by companions. Accretion can also occur directly through merging of small companions, or more violent interaction and coalescence. We discuss the relative importance of both processes, their time-scale and frequency along a Hubble time. Signatures of both processes can be found in the Milky Way. It is however likely that our Galaxy had already gathered the bulk of its mass about 8-10 Gyr ago, as is expected in hierarchical galaxy formation scenarios.
No associations
LandOfFree
Time-scale for accretion of matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Time-scale for accretion of matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-scale for accretion of matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-711505