X-RAY SPECTROSCOPY OF THE SUN
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
Estonia Online · 31 days ago 0 13
Professional Authors' Comments:
Order by: 
Per page: 
 
  • There are no comments yet
Guest comments




Who Like this
Likes · Dislikes
 
Empty
Actions
Rate
0 votes
Publisher
Link
Permanent link to this publication:

http://library.ee/blogs/entry/X-RAY-SPECTROSCOPY-OF-THE-SUN


© library.ee
 

Libmonster, International Network:

Actual publications:

Libmonster Partners

Actual publications:

Latest ARTICLES:

Latest BOOKS:

Actual publications:

LIBRARY.EE is an Estonian open digital library, repository of author's heritage and archive

Register & start to create your original collection of articles, books, research, biographies, photographs, files. It's convenient and free. Click here to register as an author. Share with the world your works!
X-RAY SPECTROSCOPY OF THE SUN
 

Contacts
Watch out for new publications:

About · News · For Advertisers · Donate to Libmonster

Estonian Digital Library ® All rights reserved.
2014-2021, LIBRARY.EE is a part of Libmonster, international library network (open map)
Keeping the heritage of Russia


LIBMONSTER NETWORK ONE WORLD - ONE LIBRARY

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 branches, 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. After registration at your disposal - more than 100 tools for creating your own author's collection. It is free: it was, it is and always will be.

Download app for smartphones