XMM-Newton Proposal 02064906

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Arp120, Arp112, Arp93, Arp104, Xmm-Newton Proposal 02064906

Scientific paper

A key concept in modern astrophysics is that galaxy interactions shape galaxy evolution. Though merging galaxies are in many ways understood, how galaxies behave in far more common, non-merging interactions, i.e. flybys, remains unknown. Based on our previous ROSAT work, suggesting that hot gas is expelled from merging spiral galaxies, we can now, by utilizing the high sensitivity and resolution of XMM-Newton, explore for the first time the details of the gas ejection and star-formation processes at various stages of a galaxy-galaxy flyby. Such a study will constrain our understanding of flyby encounters, the physics of star-formation and gas ejection, galaxy formation and evolution, the enrichment of the IGM, and the baryon content of the universe.

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