The highest-speed local dark matter particles come from the Large Magellanic Cloud
The highest-speed local dark matter particles come from the Large Magellanic Cloud
复制标题
速度最快的局部暗物质粒子来自大麦哲伦星云
DOI:
10.1088/1475-7516/2019/11/013
复制
发表时间:
2019
影响因子:
6.4
通讯作者:
Garavito-Camargo, N.
中科院分区:
文献类型:
--
作者:
Besla, G.;Peter, A.H.G.;Garavito-Camargo, N.
Using N-body simulations of the Large Magellanic Cloud (LMC's) passage through the Milky Way (MW), tailored to reproduce observed kinematic properties of both galaxies, we show that the high-speed tail of the Solar Neighborhood dark matter distribution is overwhelmingly of LMC origin. Two populations contribute at high speeds: 1) Particles that were once bound to the LMC, and 2) MW halo particles that have been accelerated owing to the response of the halo to the recent passage of the LMC. These particles reach speeds of 700–900 km/s with respect to the Earth, near or somewhat higher that the local escape speed of the MW. The high-speed particles follow trajectories similar to the Solar reflex motion, with peak velocities reached in June. For low-mass dark matter, these high-speed particles can dominate the signal in direct-detection experiments, extending the reach of the experiments to lower mass and elastic scattering cross sections even with existing data sets. Our study shows that even non-disrupted MW satellite galaxies can leave a significant dark matter footprint in the Solar Neighborhood.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
C. O’Hare
通讯作者:
C. O’Hare
DOI:
10.1088/2041-8205/721/2/l97
发表时间:
2010-08
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
G. Besla;N. Kallivayalil;L. Hernquist;R. V. D. Marel;T. J. Cox;D. Keres̆
通讯作者:
G. Besla;N. Kallivayalil;L. Hernquist;R. V. D. Marel;T. J. Cox;D. Keres̆
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
M. Boylan;G. Besla;L. Hernquist
通讯作者:
L. Hernquist
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
A. Peter
通讯作者:
A. Peter
影响因子:
8.6
作者:
Jonah Herzog-Arbeitman;M. Lisanti;P. Madau;L. Necib
通讯作者:
Jonah Herzog-Arbeitman;M. Lisanti;P. Madau;L. Necib