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03 October 2022
 
  » arxiv » astro-ph/0505619

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Formation of HD molecules in merging dark matter haloes
Yu. A. Shchekinov ; E. O. Vasiliev ;
Date 31 May 2005
Subject astro-ph
AbstractHD molecules can be an important cooling agent of the primordial gas behind the shock waves originated through mergings of the dark matter haloes at epochs when first luminous objects were to form. We study the necessary conditions for the HD cooling to switch on in the low temperature range $T<200$ K. We show that these conditions are fulfiled in merging haloes with the total (dark matter and baryon) mass in excess of $M_{ m cr}sim 10^7[(1+z)/20]^{-2.15}msun$. Haloes with masses $M>M_{ m cr}$ may be the sites of low-mass star formation.
Source arXiv, astro-ph/0505619
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