Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Biggest Explosions in the Universe   Supermassive primordial stars are expected to form in a small fraction of
massive protogalaxies in the early universe, and are generally conceived of as
the progenitors of the seeds of supermassive black holes (BHs). Supermassive
stars with masses of ~55,000 M_Sun, however, have been found to explode and
completely disrupt in a supernova (SN) with an energy of up to ~10^55 erg
instead of collapsing to a BH. Such events, ~10,000 times more energetic than
typical SNe today, would be among the biggest explosions in the history of the
universe. Here we present a simulation of such a SN in two stages. Using the
RAGE radiation hydrodynamics code we first evolve the explosion from an early
stage through the breakout of the shock from the surface of the star until the
blast wave has propagated out to several parsecs from the explosion site, which
lies deep within an atomic cooling dark matter (DM) halo at z ~ 15. Then, using
the GADGET cosmological hydrodynamics code we evolve the explosion out to
several kiloparsecs from the explosion site, far into the low-density
intergalactic medium. The host DM halo, with a total mass of 4 x 10^7 M_Sun,
much more massive than typical primordial star-forming halos, is completely
evacuated of high density gas after < 10 Myr, although dense metal-enriched gas
recollapses into the halo, where it will likely form second-generation stars
with metallicities of ~ 0.05 Z_Sun after > 70 Myr. The chemical signature of
supermassive star explosions may be found in such long-lived second-generation
stars today.

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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: cs
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin