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The evolution of the spiral galaxy M51a
2015
Proceedings of the International Astronomical Union
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A simple model for M51a is constructed to explore its evolutionary history by assuming its disk grows from continuous gas infall, which is shaped by a free parameter-the infall-peak time t p. By adopting a constant infall-peak time t p = 7.0Gyr, our model predictions can reproduce most of the observed constraints and still show that the disk of M51a forms inside-out. Our results also show that the current molecular gas surface density, the star-formation rate and the UV-band surface brightness
doi:10.1017/s1743921315009916
fatcat:lbblzw2zgbfhfapb7a6qj7e4ee