Early Black Hole formation by accretion of gas and dark matter
Early Black Hole formation by accretion of gas and dark matter
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DOI：
10.1088/1475-7516/2009/08/024
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发表时间：
2009-08
影响因子：
6.4
通讯作者：
H. Umeda;N. Yoshida;K. Nomoto;S. Tsuruta;M. Sasaki;T. Ohkubo
中科院分区：
文献类型：
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作者：
H. Umeda;N. Yoshida;K. Nomoto;S. Tsuruta;M. Sasaki;T. Ohkubo
最近发现的 z > 6 的发光类星体对宇宙结构形成理论提出了严峻的挑战。这些类星体被认为是由超大质量黑洞（SMBH）提供动力的。然而，对于大质量黑洞的起源和早期形成机制尚未达成共识。我们提出了一个模型，其中质量约为 104M⊙ 的中等质量黑洞（IMBH）在早期暗物质晕中形成。我们对第一代恒星进行了详细的恒星演化计算，包括暗物质（DM）粒子的湮没能量。我们证明，质量高达 104M⊙ 的非常大的恒星可以在早期的 DM 晕中形成。此类恒星极其明亮，Log L/L⊙ 8.2。它们会因引力塌缩而形成中质量黑洞。这些黑洞可能为早期超大质量黑洞的形成埋下了种子。
Recent discovery of luminous quasars at z > 6 has posed a severe challenge to the theory of structure formation of the universe. These quasars are thought to be powered by supermassive black holes (SMBHs). However no consensus is yet to be reached as to the origin and early formation mechanism of massive SMBHs. We propose a model in which intermediate-mass black holes (IMBHs) with mass of ~ 104M⊙ are formed in early dark matter halos. We carry out detailed stellar evolution calculations for the first generation stars including annihilation energy of dark matter (DM) particles. We show that very massive stars, as massive as 104M⊙, can be formed in an early DM halo. Such stars are extremely bright with Log L/L⊙ 8.2. They will gravitationally collapse to form IMBHs. These black holes could have seeded the formation of early SMBHs.