Multiple Ultralight Axionic Wave Dark Matter and Astronomical Structures. (arXiv:1811.03771v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Broadhurst_T/0/1/0/all/0/1">Tom Broadhurst</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Luu_H/0/1/0/all/0/1">Hoang Nhan Luu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tye_S/0/1/0/all/0/1">S. -H. Henry Tye</a>
An ultralight scalar boson with mass $m_1 simeq 10^{-22}$ eV is gaining
credence as a Dark Matter (DM) candidate that explains the dark cores of dwarf
galaxies as soliton waves. Such a boson is naturally interpreted as an axion
generic in String Theory, with multiple light axions predicted in this context.
We examine the possibility of soliton structures over a wide range of scales,
accounting for galaxy core masses and the common presence of nuclear star
clusters. We present a diagnostic soliton core mass-radius plot that provides a
global view, indicating the existence of an additional axion with mass
$m_2simeq 4 times 10^{-20}$ eV, with the possibility of a third axion with
mass $m_3 gtrsim 6 times 10^{-18}$ eV.
An ultralight scalar boson with mass $m_1 simeq 10^{-22}$ eV is gaining
credence as a Dark Matter (DM) candidate that explains the dark cores of dwarf
galaxies as soliton waves. Such a boson is naturally interpreted as an axion
generic in String Theory, with multiple light axions predicted in this context.
We examine the possibility of soliton structures over a wide range of scales,
accounting for galaxy core masses and the common presence of nuclear star
clusters. We present a diagnostic soliton core mass-radius plot that provides a
global view, indicating the existence of an additional axion with mass
$m_2simeq 4 times 10^{-20}$ eV, with the possibility of a third axion with
mass $m_3 gtrsim 6 times 10^{-18}$ eV.
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