{"id":37177,"date":"2020-07-30T14:22:00","date_gmt":"2020-07-30T11:22:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/researchers-conduct-first-simultaneous-imaging-and-spectral-study-on-a-solar-fan-spine\/"},"modified":"2020-07-30T14:22:00","modified_gmt":"2020-07-30T11:22:00","slug":"researchers-conduct-first-simultaneous-imaging-and-spectral-study-on-a-solar-fan-spine","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/researchers-conduct-first-simultaneous-imaging-and-spectral-study-on-a-solar-fan-spine\/","title":{"rendered":"#Researchers conduct first simultaneous imaging and spectral study on a solar fan-spine"},"content":{"rendered":"

“#Researchers conduct first simultaneous imaging and spectral study on a solar fan-spine<\/strong>”<\/p>\n

\n
\n
\n
\"Researchers<\/img>
\n Fig. 1 Sketch of the magnetic structures illustrating the breakout-type reconnection at the null point of the fan-spine. Credit: NAOC
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Fan-spine magnetic topology is favorable for the occurrence of solar flares through null-point reconnection.<\/p>\n

\n <\/section>\n

A research group led by Prof. Yang Shuhong from the National Astronomical Observatories of Chinese Academy of Science<\/a>s (NAOC) conducted the first simultaneous imaging and spectral study on the null point of a fan-spine magnetic topology during a solar flare. <\/p>\n

They used high-resolution imaging and spectral observations from the New Vacuum Solar Telescope (NVST), the Solar Dynamics Observatory (SDO), the Interface Region Imaging Spectrograph (IRIS), and the Geostationary Operational Environmental Satellite, as well as the high-quality vector magnetograms from the Hinode.
\nTheir findings were published in The Astrophysical Journal<\/i> on July 28.
\nProf. Yang’s group extrapolated the coronal structures based on the observed photospheric magnetogram, and confirmed the existence of the fan-spine topology.
\n“The breakout-type magnetic reconnection first occurred at the null point, and consequently the flux rope within the fan began to rise and erupt,” said Prof. Yang.
\nThe cooler material within the flux rope moved along the longer field lines to the remote end of the spine, resulting in the remote brightening.<\/p>\n

\n
\n
\"Researchers<\/img>
\n Fig. 2 Simultaneous imaging and spectral observations from the NVST and IRIS. Credit:\u00a0NAOC
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Before and after the flare peak, the total velocity of the outflows was estimated to be about 60 km\/s. At the flare peak time, the total velocity of the material outflows from the reconnection site was found to be 144 km\/s.
\nThe researchers found that there were several deep absorption lines superposed on the Si IV line profile, and they had the same blue shift of -0.1 angstrom. The reason was inferred to be that the bright reconnection site observed in the ultraviolet channel was located under the cooler material app<\/a>earing as dark features in the H\u03b1 line.
\nThe blue shifted absorption lines indicated that the cooler material moved toward the observer with the velocity of 22 km\/s. The depth of the absorption lines depended on the amount of cooler material.
\nThese results imply that this kind of spectral profiles can be used as a tool to diagnose the properties of cooler material above reconnection site. Moreover, the shift of the absorption lines can be used to convert the digital number in the H\u03b1 Doppler gram to the H\u03b1 Doppler velocity.<\/p>\n

\n<\/hr>\n
\n<\/hr>\n
\n

More information:<\/strong>
\n Shuhong Yang et al. Imaging and Spectral Study on the Null Point of a Fan-spine Structure During a Solar Flare, The Astrophysical Journal<\/i> (2020). DOI: 10.3847\/1538-4357\/ab9ac7\n <\/div>\n

\n Citation<\/strong>:
\n Researchers conduct first simultaneous imaging and spectral study on a solar fan-spine (2020, July 30)
\n retrieved 30 July 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-07-simultaneous-imaging-spectral-solar-fan-spine.html<\/p>\n

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
\n part may be reproduced without the written permission. The content is provided for information purposes only.<\/p><\/div>\n<\/p><\/div>\n

\n

If you want to read more Like this articles, you can visit our Science category.<\/a><\/span><\/strong>\n<\/p><\/blockquote>\n

\n

if you want to watch Movies<\/a> or Tv Shows go to Dizi.BuradaBiliyorum.Com<\/a> <\/span> for forums sites go to Forum.BuradaBiliyorum.Com<\/a><\/span><\/strong><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

“#Researchers conduct first simultaneous imaging and spectral study on a solar fan-spine” Fig. 1 Sketch of the magnetic structures illustrating the breakout-type reconnection at the null point of the fan-spine. Credit: NAOC Fan-spine magnetic topology is favorable for the occurrence of solar flares through null-point reconnection. A research group led by Prof. Yang Shuhong from…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[5017,46219],"class_list":["post-37177","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-astronomy","tag-researchers-conduct-first-simultaneous-imaging-and-spectral-study-on-a-solar-fan-spine"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/37177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=37177"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/37177\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=37177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=37177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=37177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}