Analysis of Gradient Profiles and Morphology of the Vela Jr. Supernova Remnant

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
S. A. Pronicheva, A. F. Iyudin
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引用次数: 0

Abstract

We present the study of gradient profiles of the Vela Jr. northwestern rim in X-ray emission and the morphology of this supernova remnant in various spectral ranges of electromagnetic radiation to estimate the distance to the object and its age. This work involves radiation intensity spatial distributions for the northwestern rim of the supernova remnant RX J0852.0–4622 in the X-ray energy range, 1000.0–2000.0 eV, obtained from measurements of the EPIC-pn camera of the XMM-Newton space observatory for four consecutive time intervals. From the calculated shifts over the period from 2004 to 2018 of the X-ray intensity profiles along the northwestern rim of Vela Jr., limits were obtained on the angular expansion rate of the shock wave of this remnant’s region into a cloud of gas, probably hydrogen: minimum speed \(V_{\theta }^{{{\text{max}}}}\) = 0.29\('' \) ± 0.04\('' \) year–1 and maximum \(V_{\theta }^{{60}}\) = 0.82\('' \) ± 0.11\('' \) year–1. The hydrogen cloud with which the supernova shock wave interacts along the northwestern rim of Vela Jr. is very inhomogeneous. The upper limits for the age of the remnant and the distance to it based on the cloud density estimate are 1920 years and 450 pc, respectively. More stringent restrictions on such parameters of RX J0852.0–4622 as its age and distance to it were obtained by analyzing the remnant’s two-ring morphology based on its images in ultraviolet, X-ray, radio and gamma rays: 1190 ± 250 years and 280 ± 60 pc.

Abstract Image

小维拉超新星残留物的梯度剖面和形态分析
我们介绍了小维拉西北边缘在 X 射线辐射中的梯度剖面以及该超新星残余物在不同电磁辐射光谱范围内的形态研究,以估算该天体的距离和年龄。这项工作涉及超新星残余物RX J0852.0-4622西北边缘在X射线能量范围(1000.0-2000.0 eV)内的辐射强度空间分布,这是XMM-牛顿空间观测站的EPIC-pn照相机连续四个时间间隔的测量结果。通过计算 2004 年至 2018 年期间沿小维拉西北边缘的 X 射线强度剖面的偏移,得出了小维拉角扩张的极限、得出了这一残余区域的冲击波进入气体云(可能是氢)的角膨胀率极限:最小速度\(V_{\theta }^{{text\{max}}}}\) = 0.29\(' \) ± 0.04\(' \) year-1,最大速度\(V_{\theta }^{60}}\) = 0.82\(' \) ± 0.11\(' \) year-1。沿小维拉西北边缘与超新星冲击波相互作用的氢云非常不均匀。根据云密度估算的残余物年龄和距离上限分别为1920年和450 pc。对 RX J0852.0-4622 的年龄和距离等参数进行更严格的限制,是通过分析残余物的双环形态,根据其紫外线、X 射线、射电和伽马射线图像得出的:1190 ± 250 年和 280 ± 60 pc。
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来源期刊
Astronomy Reports
Astronomy Reports 地学天文-天文与天体物理
CiteScore
1.40
自引率
20.00%
发文量
57
审稿时长
6-12 weeks
期刊介绍: Astronomy Reports is an international peer reviewed journal that publishes original papers on astronomical topics, including theoretical and observational astrophysics, physics of the Sun, planetary astrophysics, radio astronomy, stellar astronomy, celestial mechanics, and astronomy methods and instrumentation.
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