The 10th Dennis Sciama Memorial Lecture

Date: 
7 May 2014 - 5:00pm to 6:00pm
Venue: 
Martin Wood Complex, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU
Room: 
Martin Wood Lecture Theatre
Audience: 
General public (Age 14+)

The 10th Dennis Sciama Memorial Lecture

Professor James Binney
Department of Physics, Merton College and All Souls Visiting Lecturer, University of Oxford

Galaxies and the intergalactic medium

Cosmology tells us that most "ordinary" matter such as we are made of is not in stars or in the interstellar media of galaxies. So it must lie between galaxies. In rich clusters of galaxies it is so dense and so hot that its thermal X-ray emission has long been detected. But cluster galaxies have long had very low star-formation rates, while field galaxies like ours have continued to form stars even though the surrounding intergalactic medium is too rarefied to be detected. Chemical signatures indicate that our Galaxy has continued to accrete relatively pristine gas but there is much evidence that star formation leads to efficient ejection of gas from galaxies. A picture will be assembled of how galaxies like ours exchange matter with the intergalactic medium. This exchange influences the radial distribution of star formation and implies a specific role of massive black holes in galaxy evolution.

For more information contact: 

Leanne O'Donnell
01865 613973
Leanne.odonnell@astro.ox.ac.uk