Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..17...47h&link_type=abstract
Galaxy Evolution: Theory & Observations (Eds. Vladimir Avila-Reese, Claudio Firmani, Carlos S. Frenk & Christine Allen) Revista
Astronomy and Astrophysics
Astronomy
39
Galaxies: Evolution, Galaxies: Intergalactic Medium, Galaxies: Ism, Galaxies: Starburst
Scientific paper
In this contribution I summarize our current knowledge of the nature and significance of starburst-driven galactic winds (``superwinds''). Superwinds are complex multiphase outflows of cool, warm, and hot gas, dust, and magnetized relativistic plasma. The observational manifestations of superwinds result from the hydrodynamical interaction between the primary energy-carrying wind fluid and the ambient interstellar medium. Superwinds are ubiquitous in galaxies in which the global star-formation rate per unit area exceeds roughly 10^-1 M[ scriptstyle sun ]yr-1 kpc^-2. This criterion is met by local starbursts and the high-z Lyman Break galaxies. Several independent datasets and techniques imply that the total mass and energy outflow rates in a superwind are comparable to the starburst's star-formation-rate and mechanical energy injection rate, respectively. Outflow speeds in interstellar matter entrained in the wind range from ~ 10^2 to 10^3 km/s, but the primary wind fluid itself may reach velocities as high as ~ 3000 km s-1. The available X-ray and far-UV (FUSE) data imply that radiative losses in superwinds are not significant. Superwinds may have established the mass-metallicity relation in ellipticals and bulges, polluted the present-day inter-galactic medium to a metallicity of ~ 10 to 30% solar, heated the inter-galactic medium, and ejected enough dust into the inter-galactic medium to have observable consequences.
No associations
LandOfFree
Starburst-Driven Galactic Winds 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 Winds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starburst-Driven Galactic Winds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1372609