منابع مشابه
Metal Enrichment in Galactic Winds
Observations give evidences of the presence of metals in the intergalactic medium (IGM). The stars responsible for transforming hydrogen and helium into more complex atoms do not form outside the galaxies in the standard scenario of galaxy formation. Supernovae– driven winds and their associated feedback was proposed as a possible solution to explain such enrichment of the IGM. It turned out th...
متن کاملMetal enrichment of the intracluster medium: SN-driven galactic winds
We investigate the role of supernova (SN)-driven galactic winds in the chemical enrichment of the intracluster medium (ICM). Such outflows on galactic scales have their origin in huge star forming regions and expel metal enriched material out of the galaxies into their surroundings as observed, for example, in the nearby starburst galaxy NGC 253. As massive stars in OB-associations explode sequ...
متن کاملMetal enrichment of the intergalactic medium at z=3 by galactic winds
Studies of quasar absorption lines reveal that the low density intergalactic medium at z ∼ 3 is enriched to 10−10 solar metallicity. This enrichment may have occurred in an early generation of Population III stars at redshift z ∼> 10, by protogalaxies at 6 ∼< z ∼< 10, or by larger galaxies at 3 ∼< z ∼< 6. This paper addresses the third possiblity by calculating the enrichment of the IGM at z ∼>...
متن کاملOn the enrichment of the intergalactic medium by galactic winds
Observations of metal lines in Lyα absorption systems of small H I column density and their ubiquitous nature suggest that the intergalactic medium (IGM) was enriched to about Z ∼ 0.01 Z⊙ by a redshift z ∼ 3. We investigate the role of winds from small star-forming galaxies at high z in enriching the IGM. The existence of large numbers of small galaxies at high z follows naturally from hierarch...
متن کاملGalactic Dynamos and Galactic Winds
Spiral galaxies host dynamically important magnetic fields which can affect gas flows in the disks and halos. Total magnetic fields in spiral galaxies are strongest (up to 30 μG) in the spiral arms where they are mostly turbulent or tangled. Polarized synchrotron emission shows that the resolved regular fields are generally strongest in the interarm regions (up to 15 μG). Faraday rotation measu...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2007
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas:2007062