title: Ð Ð¿ÑÐ¸ÑÐ¾Ð´Ðµ ÑÑÐºÐ¾Ð¹ Ð¿Ð¾Ð»Ð¾ÑÐºÐ¸ Ð² Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÑÐ¶Ð½Ð¾Ð³Ð¾ Ð´Ð¶ÐµÑÐ° Ð¿ÑÐ»ÑÑÐ°ÑÐ½Ð¾Ð¹ ÑÑÐ¼Ð°Ð½Ð½Ð¾ÑÑÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: On the nature of the bar-shaped X-ray feature in the lee jet of the Vela pulsar wind nebula
Creators: name: Ð¤Ð°ÑÐµÐµÐ²Ð°, Ð¡Ð¾ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: Ð¿ÑÐ»ÑÑÐ°Ñ
Ð¿ÑÐ»ÑÑÐ°ÑÐ½ÑÐ¹ Ð²ÐµÑÐµÑ
Ð¿ÑÐ»ÑÑÐ°ÑÐ½Ð°Ñ ÑÑÐ¼Ð°Ð½Ð½Ð¾ÑÑÑ
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ÑÐ¸ÑÐ»ÐµÐ½Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
pulsar
pulsar wind
pulsar wind nebula
MHD
numerical modelling

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description: The subject of the graduate qualification work is Â«On the nature of thebar-shaped X-ray feature in the lee jet of the Vela pulsar wind nebulaÂ».Pulsar wind nebulae (PWNe) have a complex X-ray morphology with anintricate structure of plasma outflows behind it. The ability to reproduce thisintricate structure downto the smallest detail can serve as a test of validity ofPWNe models. In this study, we report preliminary results from a numericalrelativistic MHD simulation aimed at revealing the nature of a fine X-rayfeature, a small transverse bar with an angular size of 4 â²â² . 5 Ã 1 â²â² . 5 and a photonindexâ¼1.65 at the beginning of the bright segment of the southeast jet in theVela nebula. Our modeling indicates the shock-wave origin for the bar. Sucha shock may be characteristic of the leeward jet of two-tori PWNe, which arein transonic motion relative to their surroundings (as in the case of the Velanebula). The shock wave is formed due to the intense dynamical interactionof the jet with regular plasma motions in the leeward hemisphere of transonicPWNe. Namely, with large-scale circulatory motion and with large recirculationvortex in the leeward funnel of the wind termination shock. The former dams thesupersonic jet downstream and causes its head part to slow down significantly,and the latter chokes the jet at its very beginning. The shock occurs immediatelyafter the supersonic jet outflow breaks through the recirculation and collideswith the slowed outflow at the head of the jet.8ÐÑÐ²ÐµÑ Ð¾Ð±ÑÐ·Ð°ÑÐµÐ»ÐµÐ½ÐÐ¾Ð¿ÑÐ¾Ñ â8.