arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.00016astro-ph.HEastro-ph.GAastro-ph.SR
收藏

超新星遗迹N132D的高速富氧光发射喷发物的三维运动学重建

Three-Dimensional Kinematic Reconstruction of the Optically-Emitting, High-Velocity, Oxygen-Rich Ejecta of Supernova Remnant N132D

Charles J. Law, Dan Milisavljevic, Daniel J. Patnaude, Paul P. Plucinsky, Michael D. Gladders, Judy Schmidt, Niharika Sravan, John Banovetz, Hidetoshi Sano, Jor… 展开作者

Charles J. Law, Dan Milisavljevic, Daniel J. Patnaude, Paul P. Plucinsky, Michael D. Gladders, Judy Schmidt, Niharika Sravan, John Banovetz, Hidetoshi Sano, Jordan M. McGraw, George Takahashi, Salvatore Orlando

摘要:

我们提出了一个三维运动学重建的光学发射,富氧的喷出物超新星遗迹N132 D在大麦哲伦星云。数据是用6.5米麦哲伦望远镜结合IMACS+GISMO仪器和观测[O III] $λλ$ 4959,5007线发射在以N132 D为中心的${\sim}$ 3 $^{\prime}~\times$ 3 $^{\prime}$区域获得的。我们的数据的空间和光谱分辨率,使详细检查的光学喷出物的结构。N132 D的大部分光学明亮的氧喷射物排列在相对于天空平面倾斜约28 $^{\circ}$的环形几何形状中。环面的半径为4.4 pc($D_{\rm LMC}$ /50 kpc),径向速度不对称性蓝移,从$-3000$到$+2300$ km s $^{-1}$,圆周上有明显的断裂。假设从富氧细丝的几何中心同源膨胀,1745公里秒$^{-1}$的平均膨胀速度转换为2450年$\pm$ 195年爆炸以来的年龄。一个微弱的,空间分离的“失控结”(RK)的总空间速度为3650公里秒$^{-1}$是几乎垂直于环面平面和重合的X射线发射,这是大大增强了硅相对于LMC和N132 D的散装喷出物。这些运动学和化学特征表明,RK可能起源于原始恒星的深处。总的来说,N132 D的主要壳层形态和高速、富含Si的成分与仙后座A有着显著的相似性,仙后座A是IIb型超新星爆炸的结果。我们的研究结果强调了进一步观察和模拟的必要性,这些观察和模拟可以有力地协调所观察到的形态是否由爆炸动力学主导或由与环境的相互作用塑造。

英文摘要:

We present a three-dimensional kinematic reconstruction of the optically-emitting, oxygen-rich ejecta of supernova remnant N132D in the Large Magellanic Cloud. Data were obtained with the 6.5 m Magellan telescope in combination with the IMACS+GISMO instrument and survey [O III] $λλ$4959,5007 line emission in a ${\sim}$3$^{\prime}~\times$ 3$^{\prime}$ region centered on N132D. The spatial and spectral resolution of our data enable detailed examination of the optical ejecta structure. The majority of N132D's optically bright oxygen ejecta are arranged in a torus-like geometry tilted approximately 28$^{\circ}$ with respect to the plane of the sky. The torus has a radius of 4.4 pc ($D_{\rm LMC}$/50 kpc), exhibits a blue-shifted radial velocity asymmetry of $-3000$ to $+2300$ km s$^{-1}$, and has a conspicuous break in its circumference. Assuming homologous expansion from the geometric center of O-rich filaments, the average expansion velocity of 1745 km s$^{-1}$ translates to an age since explosion of 2450 $\pm$ 195 yr. A faint, spatially-separated "runaway knot" (RK) with total space velocity of 3650 km s$^{-1}$ is nearly perpendicular to the torus plane and coincident with X-ray emission that is substantially enhanced in Si relative to the LMC and N132D's bulk ejecta. These kinematic and chemical signatures suggest that the RK may have had its origin deep within the progenitor star. Overall, the main shell morphology and high-velocity, Si-enriched components of N132D have remarkable similarity with that of Cassiopeia A, which was the result of a Type IIb supernova explosion. Our results underscore the need for further observations and simulations that can robustly reconcile whether the observed morphology is dominated by explosion dynamics or shaped by interaction with the environment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑