The Formation of Population III Binaries from Cosmological Initial Conditions

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Previous high resolution cosmological simulations predict the first stars to appear in the early universe to be very massive and to form in isolation. Here we discuss a cosmological simulation in which the central 50M{sub {circle_dot}} clump breaks up into two cores, having a mass ratio of two to one, with one fragment collapsing to densities of 10{sup -8}g cm{sup -3}. The second fragment, at a distance of {approx}800 astronomical units, is also optically thick to its own cooling radiation from molecular hydrogen lines, but is still able to cool via collision-induced emission. The two dense peaks will continue to ... continued below

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16 pages

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Turk, Matthew J.; Abel, Tom; /KIPAC, Menlo Park; O'Shea, Brian W. & U., /Michigan State August 26, 2010.

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Previous high resolution cosmological simulations predict the first stars to appear in the early universe to be very massive and to form in isolation. Here we discuss a cosmological simulation in which the central 50M{sub {circle_dot}} clump breaks up into two cores, having a mass ratio of two to one, with one fragment collapsing to densities of 10{sup -8}g cm{sup -3}. The second fragment, at a distance of {approx}800 astronomical units, is also optically thick to its own cooling radiation from molecular hydrogen lines, but is still able to cool via collision-induced emission. The two dense peaks will continue to accrete from the surrounding cold gas reservoir over a period of {approx} 10{sup 5} years and will likely form a binary star system.

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16 pages

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  • Journal Name: Science 325:601-605,2009

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  • Report No.: SLAC-PUB-13699
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 992457
  • Archival Resource Key: ark:/67531/metadc1015344

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Office of Scientific & Technical Information Technical Reports

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  • August 26, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 2, 2017, 8:12 p.m.

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Turk, Matthew J.; Abel, Tom; /KIPAC, Menlo Park; O'Shea, Brian W. & U., /Michigan State. The Formation of Population III Binaries from Cosmological Initial Conditions, article, August 26, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1015344/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.