Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-09-16
New Astron.Rev. 48 (2004) 1275-1279
Astronomy and Astrophysics
Astrophysics
espcrc2.sty, 5 pages, 1 figure, to appear in: "Science with the Square Kilometer Array," New Astronomy Reviews, eds. C. Carill
Scientific paper
10.1016/j.newar.2004.09.011
The SKA is a unique instrument to open a window on many aspects of galaxy formation and evolution which can be examined in our Local Universe. Here I will focus on the outermost regions of galaxies which can be observed with sufficient sensitivity and resolution at 21-cm as to enlighten the interplay between galaxies and the intergalactic gas, the competing race between the local dark matter gravity and the external ionizing radiation field. Tracing the gas distribution out to large galactocentric radii will be complementary to QSO's Ly$\alpha$ absorption studies for understanding the evolution of the dark and visible matter of the Universe.
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