论文标题
太阳尖头的谐振轴辐射转换
Resonant Axion Radiation Conversion in Solar Spicules
论文作者
论文摘要
最近已经观察到，覆盖所有太阳能表面的太阳能Spicules具有强磁场$ b \ sim 10^2 $ g。它们应该是从染色体发出的等离子体喷射，它们到达$ \ sim 10^4 $ km。他们的电子数密度是如此，以至于$ n_e = 10^{10} \ rm cm^{ - 3} \ sim $$ 10^{12} \ rm cm cm^{ - 3} $。相应的等离子频率$ m_p = \ sqrt {e^2n_e/m_e} $（电子质量$ m_e $）几乎等于轴质量$ m_a = 10^{ - 5} $ ev $ \ sim 10^{ - 4} $ ev。因此，轴与质量的谐振辐射转化在spicules中。我们表明，从轴线暗物质转换的辐射具有通量密度$ \ sim 10^{ - 6} \ mbox {jy}（m_a/10^{ - 4} \ mbox {ev}）（b/3 \ times 10^times 10^2 \ rm g）^2 $。辐射显示带有频率$ \ simeq 24 $ GHz $（M_A/10^{ - 4} \ rm EV）的线频谱。我们的估计在物理参数上的歧义比中子星的估计值更少，因为在太阳中，诸如电子数密度之类的物理参数更为明确地观察到。但是，强烈的太阳热辐射将排除对轴辐射的敏感观察。
It has recently been observed that solar spicules covering almost of all solar surface have strong magnetic field $B\sim 10^2$G. They are supposed to be plasma jets emitted from chromosphere and they arrive up to $\sim 10^4$km. Their electron number density is such that $n_e=10^{10}\rm cm^{-3}\sim $$10^{12}\rm cm^{-3}$. Corresponding plasma frequency $m_p=\sqrt{e^2n_e/m_e}$ ( electron mass $m_e$ ) is nearly equal to axion mass $m_a=10^{-5}$eV$\sim 10^{-4}$eV. Thus, resonant radiation conversion of axion with the mass can arise in the spicules. We show that radiations converted from axion dark matter possess flux density $\sim 10^{-6}\mbox{Jy}(m_a/10^{-4}\mbox{eV})(B/3\times 10^2\rm G)^2$. The radiations show line spectrum with frequency $\simeq 24$GHz$(m_a/10^{-4}\rm eV)$. Our estimation has fewer ambiguities in physical parameters than similar estimation in neutron stars because physical parameters like electron number density have been more unambiguously observed in the sun. But, much strong solar thermal radiations would preclude sensitive observations of such radiations from the axions.
