标题： 天鹅座环的全景视图 显示英文标题

标题： Panoramic Views of the Cygnus Loop

摘要： 我们呈现了天鹅座环超新星遗迹在[O III] (5007)、H alpha和[S II] (6717, 6731)波长下的完整图谱。 尽管其呈现出壳状结构，但天鹅座环并不是一个当前的Sedov-Taylor爆轰波的例子。 相反，光学发射追踪了超新星爆轰波与气体云块的相互作用。 周围的星际介质形成了一个腔体的壁，爆轰波现在通过该腔体传播，包括一个几乎完整的壳，在其中检测到了非辐射丝状结构。 天鹅座环的爆轰波并没有从致密云中突破出来，而是遇到了限制壁。 星际介质不仅主导了天鹅座环的外观，也主导了爆轰波的持续演化。 如果这是一个典型的超新星遗迹例子，那么星际介质的全局模型必须考虑这种显著的爆轰波减速。 显示英文摘要

摘要： We present a complete atlas of the Cygnus Loop supernova remnant in the light of [O III] (5007), H alpha, and [S II] (6717, 6731). Despite its shell-like appearance, the Cygnus Loop is not a current example of a Sedov-Taylor blast wave. Rather, the optical emission traces interactions of the supernova blast wave with clumps of gas. The surrounding interstellar medium forms the walls of a cavity through which the blast wave now propagates, including a nearly complete shell in which non-radiative filaments are detected. The Cygnus Loop blast wave is not breaking out of a dense cloud, but is instead running into confining walls. The interstellar medium dominates not only the appearance of the Cygnus Loop but also the continued evolution of the blast wave. If this is a typical example of a supernova remnant, then global models of the interstellar medium must account for such significant blast wave deceleration.