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  1. The Astronomy and Astrophysics Review
  2. The Astronomy and Astrophysics Review : Volume 10
  3. The Astronomy and Astrophysics Review : Volume 10, Issue 1-2, June 2000
  4. The most metal-poor galaxies
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The Astronomy and Astrophysics Review : Volume 24
The Astronomy and Astrophysics Review : Volume 23
The Astronomy and Astrophysics Review : Volume 22
The Astronomy and Astrophysics Review : Volume 21
The Astronomy and Astrophysics Review : Volume 20
The Astronomy and Astrophysics Review : Volume 19
The Astronomy and Astrophysics Review : Volume 18
The Astronomy and Astrophysics Review : Volume 17
The Astronomy and Astrophysics Review : Volume 16
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The Astronomy and Astrophysics Review : Volume 13
The Astronomy and Astrophysics Review : Volume 12
The Astronomy and Astrophysics Review : Volume 11
The Astronomy and Astrophysics Review : Volume 10
The Astronomy and Astrophysics Review : Volume 10, Issue 4, March 2002
The Astronomy and Astrophysics Review : Volume 10, Issue 3, September 2000
The Astronomy and Astrophysics Review : Volume 10, Issue 1-2, June 2000
The most metal-poor galaxies
The emission line spectrum of active galactic nuclei and the unifying scheme
The active galaxy NGC 4151: Archetype or exception?
The Astronomy and Astrophysics Review : Volume 9
The Astronomy and Astrophysics Review : Volume 8

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The most metal-poor galaxies

Content Provider Springer Nature Link
Author Kunth, D. Östlin, G.
Copyright Year 2000
Abstract Metallicity is a key parameter that controls many aspects in the formation and evolution of stars and galaxies. In this review we focus on the metal deficient galaxies, in particular the most metal-poor ones, because they play a crucial rôle in the cosmic scenery. We first set the stage by discussing the difficult problem of defining a global metallicity and how this quantity can be measured for a given galaxy. The mechanisms that control the metallicity in a galaxy are reviewed in detail and involve many aspects of modern astrophysics: galaxy formation and evolution, massive star formation, stellar winds, chemical yields, outflows and inflows etc. Because metallicity roughly scales as the galactic mass, it is among the dwarfs that the most metal-poor galaxies are found. The core of our paper reviews the considerable progress made in our understanding of the properties and the physical processes that are at work in these objects. The question on how they are related and may evolve from one class of objects to another is discussed. While discussing metal-poor galaxies in general, we present a more detailed discussion of a few very metal-poor blue compact dwarf galaxies like IZw18. Although most of what is known relates to our local universe, we show that it pertains to our quest for primeval galaxies and is connected to the question of the origin of structure in the universe. We discuss what do QSO absorption lines and known distant galaxies tell us already? We illustrate the importance of star-forming metal-poor galaxies for the determination of the primordial helium abundance, their use as distance indicator and discuss the possibility to detect nearly metal-free galaxies at high redshift from Ly $\alpha$ emission.
Starting Page 1
Ending Page 79
Page Count 79
File Format PDF
ISSN 09354956
Journal The Astronomy and Astrophysics Review
Volume Number 10
Issue Number 1-2
e-ISSN 14320754
Language English
Publisher Springer-Verlag
Publisher Date 2000-06-01
Publisher Place Berlin, Heidelberg
Access Restriction One Nation One Subscription (ONOS)
Content Type Text
Resource Type Article
Subject Astronomy and Astrophysics Space and Planetary Science
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