Starburst--driven galactic outflows

Details Starburst--driven galactic outflows Starburst--driven galactic outflows

2009-05-04

arxiv.org/abs/0905.0314v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 4 figures, to appear in MNRAS (Letters)

Scientific paper

We propose a model of starburst--driven galactic outflows whose dynamics depends on both radiation and thermal pressure. Standard models of thermal pressure--driven winds fail to explain some key observations of outflows at low and high redshift galaxies. We discuss a scenario in which radiation pressure from massive stars in a stellar population drive a shell of gas and dust. Subsequent supernova (SN) explosions from the most massive stars in this population then drive stellar ejecta outward in a rarefied medium, making it collide with the radiation pressure driven shell. The collision imparts renewed momentum to the shell, and the resulting re-acceleration makes the shell Rayleigh-Taylor unstable, fragmenting the shell. We show that the speed of these ballistic fragments can explain some recently observed correlations in Lyman break galaxies between wind speed, reddening and star formation rate.

Affiliated with

Also associated with

No associations

Rating

Starburst--driven galactic outflows does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Starburst--driven galactic outflows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starburst--driven galactic outflows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-199026