An upper limit on the mass of a primordial star due to the formation of an H II region: The effect of ionizing radiation force

Kazuyuki Omukai, Shu Ichiro Inutsuka

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

We investigate analytically the formation of an H II region in the accreting envelope of a newborn star. Special care is taken to examine the role of ionizing radiation force. This effect modifies velocity and density distributions, and thereby affects the expansion of the Hn region. As a result, the upper limit of the stellar mass imposed by the growth of an H II region around a forming star is increased by a larger factor than the previous estimate. In particular, for a star forming out of metal-free gas. this mechanism does not impose a firm upper limit on its mass.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume332
Issue number1
DOIs
Publication statusPublished - 2002 May 1

Keywords

  • Cosmology: Theory
  • Early Universe
  • H II regions
  • Stars: Formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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