Universal gravothermal evolution of isolated self-interacting dark matter halos for velocity-dependent cross-sections
Universal gravothermal evolution of isolated self-interacting dark matter halos for velocity-dependent cross-sections
复制标题
速度相关截面的孤立自相互作用暗物质晕的普遍引力热演化
DOI:
10.1093/mnras/stad1705
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发表时间:
2023
影响因子:
4.8
通讯作者:
Sagunski, Laura
中科院分区:
文献类型:
--
作者:
Outmezguine, Nadav Joseph;Boddy, Kimberly K.;Gad-Nasr, Sophia;Kaplinghat, Manoj;Sagunski, Laura
We study the evolution of isolated self-interacting dark matter halos using spherically symmetric gravothermal equations allowing for the scattering cross-section to be velocity dependent. We focus our attention on the large class of models where the core is in the long mean free path regime for a substantial time. We find that the temporal evolution exhibits an approximate universality that allows velocity-dependent models to be mapped onto velocity-independent models in a well-defined way using the scattering time-scale computed when the halo achieves its minimum central density. We show how this time-scale depends on the halo parameters and an average cross-section computed at the central velocity dispersion when the central density is minimum. The predicted collapse time is fully defined by the scattering time-scale, with negligible variation due to the velocity dependence of the cross-section. We derive new self-similar solutions that provide an analytic understanding of the numerical results.
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影响因子:
5
作者:
O. Slone;F. Jiang;M. Lisanti;M. Kaplinghat
通讯作者:
O. Slone;F. Jiang;M. Lisanti;M. Kaplinghat
DOI:
10.1111/j.1365-2966.2011.18684.x
发表时间:
2011
影响因子:
4.8
作者:
J. Koda;P. Shapiro
通讯作者:
P. Shapiro
DOI:
10.1073/pnas.1308716112
发表时间:
2013-06
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
D. Weinberg;J. Bullock;F. Governato;Rachel Kuzio de Naray;A. Peter
通讯作者:
D. Weinberg;J. Bullock;F. Governato;Rachel Kuzio de Naray;A. Peter
影响因子:
4.8
作者:
D. Harvey;A. Robertson;R. Massey;I. McCarthy
通讯作者:
I. McCarthy
影响因子:
6.4
作者:
Chu, Xiaoyong;Garcia-Cely, Camilo;Murayama, Hitoshi
通讯作者:
Murayama, Hitoshi