TY - JOUR
T1 - An upper limit on the mass of a primordial star due to the formation of an H II region
T2 - The effect of ionizing radiation force
AU - Omukai, Kazuyuki
AU - Inutsuka, Shu Ichiro
N1 - Copyright:
Copyright 2005 Elsevier B.V., All rights reserved.
PY - 2002/5/1
Y1 - 2002/5/1
N2 - 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.
AB - 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.
KW - Cosmology: Theory
KW - Early Universe
KW - H II regions
KW - Stars: Formation
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U2 - 10.1046/j.1365-8711.2002.05276.x
DO - 10.1046/j.1365-8711.2002.05276.x
M3 - Article
AN - SCOPUS:0038510450
VL - 332
SP - 59
EP - 64
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -