天鹅座环形冲击丝的适当运动

IF 0.8 4区 物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS
M. Vucetic, N. Milanovic, D. Urosevic, J. Raymond, D. Onic, S. Milosevic, N. Petrov
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引用次数: 1

摘要

我们利用银河系超新星残余天鹅座环(Cygnus Loop)光学细丝的正常运动和对其距离的最新估计,确定了它的冲击速度。我们通过比较1993年(基特峰国家天文台)和2018/2019年(罗镇国家天文台和维多耶维察天文站)两个时间段观测到的该残余星的H?我们得出了沿不同细丝的 35 个位置的冲击速度,是早期对天鹅座环带东北部研究的两倍。我们首次测量了该地区辐射丝的冲击速度。根据我们在第二纪[SII]图像中测量到的辐射丝的正常运动,我们分析了其中三个位置。其他细丝则为非辐射细丝。我们得到的非辐射光丝的速度在 240{650 公里/秒之间,不确定性估计为 70 公里/秒。这些数值与之前的研究基本一致。辐射丝的速度较低,为 100-160 ?70 km s-1,这与它们在演化过程中年龄较大的假设是一致的。两类辐射丝速度的明显区别证明,[SII]辐射可以用来识别超新星残余中的辐射丝。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Proper motion of Cygnus Loop shock filaments
We determined the shock speed in the Galactic supernova remnant Cygnus Loop, using the proper motion of its optical filaments and the latest estimate of its distance. The proper motion was measured by comparing H? images of the remnant observed in two epochs: 1993 (Kitt Peak National Observatory) and 2018/2019 (National Astronomical Observatory Rozhen and Astronomical Station Vidojevica). We derived shock speed for 35 locations along different filaments, which is twice as much as in earlier studies of the north-eastern part of the Cygnus Loop. For the first time, we have measured the shock speed of the radiative filaments in this region. Three of the analyzed locations where we measured the proper motion of filaments are radiative, based on their presence in [SII] images from the second epoch. The other filaments are non-radiative. The speed we obtained for the non-radiative filaments is in the range of 240{650 km s-1, with an estimate for the uncertainty of 70 km s-1. These values are mostly in agreement with previous studies. The radiative filaments have lower speeds of 100-160 ?70 km s-1, which is in agreement with the assumption that they are older in evolutionary terms. This clear distinction between the speed of the two types of filaments proves that [SII] emission can be used for identifying radiative filaments in supernova remnants.
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来源期刊
Serbian Astronomical Journal
Serbian Astronomical Journal ASTRONOMY & ASTROPHYSICS-
CiteScore
1.00
自引率
0.00%
发文量
6
审稿时长
12 weeks
期刊介绍: Serbian Astronomical Journal publishes original observations and researches in all branches of astronomy. The journal publishes: Invited Reviews - review article on some up-to-date topic in astronomy, astrophysics and related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers - articles offering experience useful for the improvement of professional practice i.e. article describing methods and techniques, software, presenting observational data, etc. In some cases the journal may publish other contributions, such as In Memoriam notes, Obituaries, Book Reviews, as well as Editorials, Addenda, Errata, Corrigenda, Retraction notes, etc.
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