Galaxy-scale feedback in massive galaxies without AGN

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• Jim Geach (Hertfordshire)
• Wednesday 10 December 2014, 14:30-15:30
• Physics West 117.

If you have a question about this talk, please contact Ilya Mandel.

In traditional models of galaxy evolution, feedback associated with an active galactic nucleus (AGN) have been invoked as the standard channel to regulate stellar mass growth at the massive end of the mass function. We have been investigating a sample of massive, compact galaxies that exhibit ultra-fast gas outflows (up to 2500 km/s) with no evidence of significant AGN activity. Recently we have shown that in at least one of these galaxies, a significant amount of molecular gas is being driven out at speeds of up to 1000 km/s. I will discuss how this sample demonstrates that stellar feedback can be an effective channel for curtailing stellar mass growth in massive galaxies, and in particular the role of stellar radiation pressure as a mechanism for launching galaxy scale super winds from high density star forming regions.

This talk is part of the Astrophysics Seminars series.

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• Astrophysics Seminars
• Bham Talks
• Physics West 117
• What's on in Physics?

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