Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Positive Feedback of Pop III Objects on Galaxy Formation   We study the formation of molecular hydrogen in cooling gas behind shocks
produced during the blow-away process thought to occur in the first collapsed,
luminous (Pop III) objects in the early universe. We find that for a wide range
of physical parameters the $H_2$ fraction is $f \approx 6 \times 10^{-3}$. The
$H_2$ mass produced in such explosions can exceed the amount of relic $H_2$
destroyed inside the photodissociation region surrounding a given Pop III. We
conclude that these first objects, differently from the suggestion of Haiman et
al 1997, might have a net positive feedback on subsequent galactic formation.
We discuss the effects of radiation and the implications of our results for the
soft-UV background.

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The categories of this paper are: hep-ph
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The categories of this paper are: econ
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: alg-geom