RADIO SOURCE FEEDBACK IN GALAXY EVOLUTION
RADIO SOURCE FEEDBACK IN GALAXY EVOLUTION
复制标题
星系演化中的无线电源反馈
DOI:
10.1088/0004-637x/699/1/525
复制
发表时间:
2009
期刊:
影响因子:
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通讯作者:
P. Alexander
中科院分区:
文献类型:
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作者:
S. Shabala;P. Alexander
We present a galaxy evolution model which incorporates a physically motivated implementation of active galactic nucleus feedback. Intermittent jets inflate cocoons of radio plasma which then expand supersonically, shock heating the ambient gas. The model reproduces observed star formation histories to the highest redshifts for which reliable data exist, as well as the observed galaxy color bimodality. Intermittent radio source feedback also naturally provides a way of keeping the black hole and spheroid growth in step. We find possible evidence for a top-heavy initial mass function for z > 2, consistent with observations of element abundances, and submillimeter and Lyman break galaxy counts.