According to the Agency of Scientific Information, the Institute of Physics named after P. Lebedev summed up the results of space experiments held in 1994-2009 within the framework of the Koronas program (complex orbital circumterrestrial solar activity observations) effected by the RAS that envisaged launching of 3 new sun-oriented satellites to the orbit. Extraatmospheric studies of the nearest star has been carried out for 50 years. On the initiative of the well-known Soviet physicist Sergei Mandelshtam, Corresponding Member of the USSR AS from 1979, the second artificial satellite of the Earth* launched on November 3, 1957, was furnished with the device registering X-ray short wave radiation. The equipment designed at the Laboratory of X-Ray Astronomy of the Sun, FIAN, registered the first monochromatic pictures of the disc and the corona attached to it in the X-ray spectrum with high spatial and temporal resolution. As a result, scientists discovered a new class of hot plasma structures with sizes varying from tens to hundreds of thousands of kilometers and the temperature exceeding 5 mln пїЅC. They also ascertained some other scientific data: the temperature of the external boundary layer of the Sun called the photosphere is about 6,000 пїЅC; while moving away from the surface it drops to about 4,000 пїЅC, but then suddenly rises. In a thin, the so-called transitional layer (in a solar scale), where the plasma density reduces by some orders the temperature reaches 1.5 mln пїЅC. "Why is the corona hot? We do not know,"--Alexander Urnov, a leading research assistant of the Spectroscropy Department, FIAN, tells us. "An enormous amount of energy is reserved in the magnetic field of various mag-netoplasma structures. Explanation of the mechanism * See: Yu. Markov, "Breakthrough Into Cosmos--Our Glory and Pride", Science in Russia, No. 2, 2007.--Ed. стр. 10 of its isolation and transformation into other forms (accelerated particles ... Read more

This publication was posted on Libmonster in another country. The article seemed interesting to our editor.

Full version: https://libmonster.com/m/articles/view/X-RAY-SPECTROSCOPY-OF-THE-SUN
Sweden Online · 986 days ago 0 285
Professional Authors' Comments:
Order by: 
Per page: 
  • There are no comments yet
Library guests comments

0 votes
Sweden Online
Stockholm, Sweden
17.09.2021 (986 days ago)
Permanent link to this publication:


© library.se
Library Partners

LIBRARY.SE - Swedish Digital Library

Create your author's collection of articles, books, author's works, biographies, photographic documents, files. Save forever your author's legacy in digital form. Click here to register as an author.

Editorial Contacts
Chat for Authors: SE LIVE: We are in social networks:

About · News · For Advertisers

Swedish Digital Library ® All rights reserved.
2014-2024, LIBRARY.SE is a part of Libmonster, international library network (open map)
Keeping the heritage of Serbia


US-Great Britain Sweden Serbia
Russia Belarus Ukraine Kazakhstan Moldova Tajikistan Estonia Russia-2 Belarus-2

Create and store your author's collection at Libmonster: articles, books, studies. Libmonster will spread your heritage all over the world (through a network of affiliates, partner libraries, search engines, social networks). You will be able to share a link to your profile with colleagues, students, readers and other interested parties, in order to acquaint them with your copyright heritage. Once you register, you have more than 100 tools at your disposal to build your own author collection. It's free: it was, it is, and it always will be.

Download app for Android