= Avishai Dekel
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<Avishai Dekel> studies the physical assembly of <galaxies>, including how they acquire the <gas> needed for <star formation>. With collaborators he used cosmological <numerical simulations> and clustering theory to investigate rapidly star-forming <galaxies> in the young <Universe>.
Their model showed narrow cold streams penetrating the hot <gas> of massive <dark-matter haloes>. Such inflows can supply an extended rotating <galactic disk> without requiring every episode of rapid <star formation> to be triggered by a destructive major merger. The paper distinguished smoother stream-fed growth from the rarer, more extreme merger-driven starbursts.<Cold streams in early massive hot haloes as the main mode of galaxy formation by Avishai Dekel and others>[Abstract: simulations, penetrating cold streams and comparison with merger-driven formation]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Avishai_office24_s.jpg?width=260]
{title=Portrait of <Avishai Dekel>}
{description=דאגלס גוטרי (author as credited on Commons). https://creativecommons.org/licenses/by-sa/3.0/[CC BY-SA 3.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Avishai_office24_s.jpg}
{width=260}
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