标题： [Ar II] 7微米线宽成分的SN 1987A谜团 显示英文标题

标题： Puzzle of [Ar II] 7 mcm line broad component of SN 1987A

摘要： 我们研究了与超新星1987A的中子星激波激发相关的[Ar II] 7微米线发射的宽成分的起源。 我们认为，该线的宽翼是在$\sim300$K 的温度下发射的。 [Ar II]线红翼的流量过剩可以通过光子在光学薄且均匀的尘埃组分上的散射来重现，尘粒尺寸为1-2微米，总质量为$\mbox{(several)}\times10^{-3}\,M{\odot}$。 几乎包含所有SN 1987A尘埃的尘埃不透明团块具有较低的遮蔽光学深度，在这些团块上尘埃上的线光子散射在红翼中没有显著贡献。 额外的加热可能与相对论质子的电离损失有关。 显示英文摘要

摘要： We explore the origin of the broad component of the [Ar II] 7 mcm line emission related to the ejecta excitation by the neutron star of SN 1987A. We argue that the line broad wings are emitted at the tmperature of $\sim300$ K. The flux excess in the red wing of [Ar II] line is reproduced by the line photons scattering off the optically thin uniform dust component with the grain size of 1 - 2 mcm and the total mass of $\mbox{(several)}\times10^{-3}\,M{\odot}$. The dusty opaque clumps containing almost all the dust of SN~1987A have a low occultation optical depth and line photon scattering on dusty clumps do not contribute noticeably in the red wing. The additional heating might be related to ionization losses of relativistic protons.