Ultra-light dark matter in ultra-faint dwarf galaxies
Ultra-light dark matter in ultra-faint dwarf galaxies
复制标题
超微弱矮星系中的超轻暗物质
DOI:
10.1093/mnras/stw1256
复制
发表时间:
2016
影响因子:
4.8
通讯作者:
Calabrese E
中科院分区:
文献类型:
--
作者:
Calabrese E
Cold Dark Matter (CDM) models struggle to match the observations at galactic scales. The tension can be reduced either by dramatic baryonic feedback effects or by modifying the particle physics of CDM. Here, we consider an ultra-light scalar field DM particle manifesting a wave nature below a DM particle mass-dependent Jeans scale. For DM massm∼ 10−22eV, this scenario delays galaxy formation and avoids cusps in the centre of the dark matter haloes. We use new measurements of half-light mass in ultra-faint dwarf galaxies Draco II and Triangulum II to estimate the mass of the DM particle in this model. We find that if the stellar populations are within the core of the density profile then the data are in agreement with a Wave Dark Matter model having a DM particle withm∼ 3.7–5.6 × 10−22eV. The presence of this extremely light particle will contribute to the formation of a central solitonic core replacing the cusp of a Navarro–Frenk–White profile and bringing predictions closer to observations of cored central density in dwarf galaxies.
登录
查看更多内容
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
V. Lora
通讯作者:
V. Lora
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
C. M. González;J. E. M. Aguilar;Luz Marina Reyes Barrera
通讯作者:
Luz Marina Reyes Barrera
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
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
F. S. Guzmán;T. Matos;H. Villegas
通讯作者:
H. Villegas
影响因子:
5
作者:
T. Harko
通讯作者:
T. Harko