Motions in the Solar Atmosphere

Virtually all of the rotation velocities of the active sun are derived from proper motions of sunspots , plages , etc. ... MOTIONS IN THE SOLAR ATMOSPHERE Resolved motions in the solar atmosphere can be ordered in a set of very specific ...

Motions in the Solar Atmosphere

The report presents two papers on observational evidence for large and small scale motions in the solar atmosphere.

Motions in the Solar Atmosphere

HIGH SPATIAL RESOLUTION IMAGING IN SOLAR PHYSICS J.A. BONET Instituto de Astrofísica de Canarias E-38200 La Laguna, Tenerife, Spain 1. Introduction Physical processes in the Sun give rise to an ample variety of structures on different ...

Motions in the Solar Atmosphere

This book contains the proceedings of the Summerschool and Workshop Motions in the Solar Atmosphere held from September 1st to September 12th, 1997, at the Solar Observatory Kanzelh6he, which belongs to the Astronomical Institute of the University of Graz, Austria. This type of conference has proved to be very successful in bringing together experts from specialized topics in solar physics and young scientists and students from different countries. Moreover, the summerschool was accompanied by a workshop which offered young scientists the opportunity to present their new results to a general audience. In total the summerschool and the workshop were attended by 50 par ticipants from 10 different countries. The topic selected was quite general, covering the whole solar atmo sphere and its dynamic processes: from dynamo actions and large and small scale motions in the photosphere through the complex dynamics of the chro mosphere to the corona. Also the possible influences of variations in solar output parameters to the Earth's climate were addressed. The main lec tures were given by 7 lecturers. Furthermore, there were 20 contributions to the workshop which were presented in oral form. The selection of the Kanzelh6he Solar Observatory located in Central Europe, Austria, also permitted colleagues from the former eastern coun tries to attend the meeting. At the Kanzelh6he Observatory new instru ments had been recently installed so that the meeting provided a further stimulus for the local people working there.

Magnetic Fields in the Solar Atmosphere

In such a magnetogram are distinguished the following magnetic structures : KPNO 4. Beckers , J.M. , and Canfield , R.C. ( 1975 ) Motions in the solar atmosphere , AFCRL Environmental Research Paper No. 540. ( Also in Proceedings CNRS ...

Magnetic Fields in the Solar Atmosphere

This paper describes the magnetic field configurations observed in the solar atmosphere including the corona and the solar wind. The techniques for observing solar magnetic fields are briefly reviewed. The significance of Alfven waves in transporting energy is stressed. (Author).

Methods of Measuring Solar and Terrestrial Atmospheric Circulations

SOLAR AND TERRESTRIAL ATMOSPHERIC CIRCULATIONS REFERENCES Unclassified Security Classification 2a . DOCUMENT CONTROL DATA - R. 17 solar observers , we will be forced to infer these motions indirectly using some such assumptions as those ...

Methods of Measuring Solar and Terrestrial Atmospheric Circulations


Environmental Research Papers

Motions in the Solar Atmosphere 3 . Conclusion References 7 13 45 46 MOTIONS IN THE SOLAR ATMOSPHERE 1. Spatially Resolved Motions in the Solar Atmosphere J. M. Beckers and R. C. Canfield Sacramento Peak Observatory Air Force Cambridge ...

Environmental Research Papers


Magnetodynamic Phenomena in the Solar Atmosphere

Introduction We consider the generation mechanism of current loops which may be related to convective motions near the Sun's surface. Recently Sakai and Fushiki (1995) showed that a shell current loop with a diffuse closure current can ...

Magnetodynamic Phenomena in the Solar Atmosphere

These are the Proceedings of Colloquium No. 153 of the International Astro nomical Union, held at Makuhari near Tokyo on May 22 - 26, 1995, and hosted by the National Astronomical Observatory. This meeting was intended to be an interdisciplinary meeting between re searchers of solar and stellar activity, in order for them to exchange the newest information in each field. While each of these areas has seen remarkable advances in recent years, and while the researchers in each field have felt that information from the other's domain would be extremely useful in their own work, there have not been very many opportunities for intensive exchanges of information between these closely related fields. We therefore expected much from this meeting in pro viding stellar researchers with new results of research on the counterparts of their targets of research, spatially and temporarily resolved, as observed on the Sun. Likewise we hoped to provide solar researchers with new results on gigantic ver sions of their targets of research under the very different physical circumstances on other active stars. It was our greatest pleasure that we had wide attendance of experts and active researchers of both research fields from all over the world. This led to extremely interesting talks and very lively discussions, thereby stimulating the exchange of ideas across the fields.

The Quiet Sun

Solar Phys . 14 , 42–61 . DEUBNER , F. - L .: 1967 , Some Properties of Velocity Fields in the Solar Photosphere . ... Inhomogeneities in the Solar Atmosphere , Pt . 3 , Vertical Oscillatory Motions in the Solar Photosphere .

The Quiet Sun

An up-to-date textbook of solar physics is presented. The solar structure and processes, and the interior are described along with the photosphere, the chromosphere, and the corona. The strongest Fraunhofer lines, visible coronal lines, and coronal UV, XUV, and X-ray lines are listed.

Literature 1991 Part 2

This may involve the presence of magnetic fields in the Sun's core and is related to the location of the activity cycle dynamo mechanism. 080.097 Magnetic fields and motions in the solar atmosphere. S. I. Gopasyuk. Kinematika Fiz.

Literature 1991  Part 2

"Astronomy and Astrophysics Abstracts" appearing twice a year has become oneof the fundamental publications in the fields of astronomy, astrophysics andneighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. The abstrats are classified under more than a hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world.

Magnetohydrodynamic Waves in the Solar Atmosphere Heating and Seismology

Resonant absorption of transverse oscillations and associated heating in a solar prominence. II. Numerical aspects. ... The transverse and rotational motions of magnetohydrodynamic kink waves in the solar atmosphere. Astrophys.

Magnetohydrodynamic Waves in the Solar Atmosphere  Heating and Seismology


Proceedings of the Plasma Space Science Symposium

SOLAR ATMOSPHERE JOHN W. EVANS Sacramento Peak Observatory, Air Force Cambridge Research Laboratories, Sunspot, ... Since the pioneer work of Richardson and Schwarzschild in 1950, the study of atmospheric motions in the Sun, ...

Proceedings of the Plasma Space Science Symposium

Space, whether interplanetary or interstellar, is filled with plasma or ionized gas. The success of space exploration must count heavily on the study and understanding ofthe plasma. With this view, the Symposium ofPlasma Space Science was held at The Catholic University of America in Washington, D.C., in cooperation with the National Aeronautics and Space Administration and the Goddard Space Flight Center, June 11-14, 1963. The symposium was organized by Dr. C. C. Chang as director and Dr. Y. C. Whang as assistant director. The proceedings consist of four parts. The first part describes the solar phenomena: solar magnetic field, flare, atmosphere, cosmic rays, radiation, etc. The second part deals with the solar wind or interplanetary plasma. This includes both theoretical treatment and experimental measurements of Mariner H. The third part is concen trated on magnetosphere, with the measurements on trapped radiation from natural sources and high altitude thermonuclear explosions, and particularly with the magnetopause. The fourth and last part includes the ring current, geomagnetic storms, the aurora, the ionosphere and lunar surface phenomena. There was round table discussion in each session. Many interesting comments and stimulating arguments emerged from the floor and are included in the Proceedings.

Literature 1976 Part 2

080,068 Filtering of acoustic waves in the solar atmosphere. J. Provost. Physique des mouvements dans les atmosphères stellaires, (see 012,041), p. 281 - 283 (1976). 080.069 Observational evidence for unresolved motions in the solar ...

Literature 1976  Part 2

Astronomy and Astrophysics Abstracts, which has appeared in semi-annual volumes since 1969, is de voted to the recording, summarizing and indexing of astronomical publications throughout the world. It is prepared under the auspices of the International Astronomical Union (according to a resolution adopted at the 14th General Assembly in 1970). Astronomy and Astrophysics Abstracts aims to present a comprehensive documentation of literature in all fields of astronomy and astrophysics. Every effort will be made to ensure that the average time interval between the date of receipt of the original literature and publication of the abstracts will not exceed eight months. This time interval is near to that achieved by monthly abstracting journals, com pared to which our system of accumulating abstracts for about six months offers the advantage of greater convenience for the user. Volume 18 contains literature published in 1976 and received before March 1, 1977; some older liter ature which was received late and which is not recorded in earlier volumes is also included.

Waves and Oscillations in the Solar Atmosphere IAU S247

2008 International Astronomical Union doi : 10.1017 / S1743921308014981 Solar feature tracking in both spatial and ... Sun : activity , Sun : atmospheric motions , Sun : corona , Sun : evolution , Sun : flares , Sun : oscillations 1.

Waves and Oscillations in the Solar Atmosphere  IAU S247

Provides the latest summary on the solar coronal heating enigma and magneto-seismology of the solar atmosphere, for solar physics researchers.

Nuclear processes in the solar atmosphere and the particle acceleration problem

Continuous wave motions similar to seismic motions on Earth shake the internal regions of the Sun. The velocity and direction of acoustic - wave propagation depend on the temperature , composition and motion of material within the Sun.

Nuclear processes in the solar atmosphere and the particle acceleration problem


Scientific and Technical Aerospace Reports

Observations of motions in the solar atmosphere led to the discovery of a new scale of solar motion , the so - called mesogranulation . ... In the quiet sun , 37 % of the He 1 lambda 10830 dark points , used as a proxy for X - ray ...

Scientific and Technical Aerospace Reports


Radiation Transport in Spectral Lines

It is now clearly recognized that much of the motion in the solar atmosphere is of a periodic wave character, and that the wave motion accounts at least partially for the non-thermal line broadening. However, it still appears that other ...

Radiation Transport in Spectral Lines

The usual book on the theory of spectral line formation begins with an in-depth dis cussion of radiation transfer, including the elegant methods of obtaining analytical solutions for special cases, and of the physics of line broadening. Neither of those features will be found in this book. It is assumed that the reader is already familiar with the essentials of transport theory and of line broadening and is ready to investi gate some of the particular applications of the theory to the flow of line photons through the outer layers of a star, or other tenuous media. The main thrust of this book is toward the compilation and presentation of a vast quantity of computational material available to the author in the form of computer output. The material presented represents a highly filtered sample of the published work in this subject plus an extensive set of previously unpublished results. To present large quantities of computer output in an intelligible and efficient way is a difficult task, for which I have found no really satisfactory solution. Chapters III and IV, in particular, contain almost exclusively this type of presentation. The reader may find these chapters somewhat tedious because of the level of condensation of the material. I have tried to reach a reasonable balance between over condensation and excessive detail, which in the long run may be irrelevant.

Solar and Stellar Granulation

Atroshchenko, I.N., Gadun, A.S., and Kostik, R.I.: 1989, “Asymmetry of Absorption Lines in the Solar and Procyon ... 55 Beckers, J.M. and Canfield, R.C.: 1976, Spatially Resolved Motions in the Solar Atmosphere', in R.C. Cayrel and M.

Solar and Stellar Granulation

Robert J. Rutten Sterrekundig Instituut Utrecht, The Netherlands Why this workshop? Why this workshop? Or rather, since the real question that arose about a year ago was not whether there should be another OAC workshop, but only what it should be about: why a workshop on granulation? To answer this question I will play an unfair trick on you. I will simply present the scientific justification which I included last autumn in a grant application to NATO's Scientific Affairs Division. It lists the reasons why I thought a workshop on this particular topic and at this particular moment ought to be worthwhile. There must be something in its reasoning, because NATO has indeed agreed to co-sponsor this workshop, and because all of you have decided to spend time and effort on your contributions and to journey to this beautiful island in order to participate. But since the proof is in the pudding, I am eager to see whether indeed this workshop will be as outstanding as I have promised; in the meantime, you are entitled to know what we got you here for. The justification went as follows: "The subject 'granulation' has recently become a hot topic, at the center of much new research, observational as well as interpretational and theoretical, and both in solar physics and in stellar physics.

Payload and Mission Definition in Space Sciences

These solar atmospheric layers are identified in the following , simple - minded way . The 6000 K photosphere is ... The loops are stressed magnetic arcade systems twisted by the motions of the Sun , which are trapping hot plasmas .

Payload and Mission Definition in Space Sciences

A text intended for scientists and engineers involved in the definition and development of space science missions.

Literature 1980 Part 1

Intensities of extreme-ultraviolet emission lines formed in quiet Sun regions, a coronal hole, an active region, and a prominence are used to derive chemical abundances of ... 080.005 On large-scale motions in the solar atmosphere.

Literature 1980  Part 1

Astronomy and Astrophysics Abstracts, which has appeared in semi-annual volumes since 1969, is de voted to the recording, summarizing and indexing of astronomical publications throughout the world. It is prepared under the auspices of the International Astronomical Union (according to a resolution adopted at the 14th General Assembly in 1970). Astronomy and Astrophysics Abstracts aims to present a comprehensive documentation of literature in all fields of astronomy and astrophysics. Every effort will be made to ensure that the average time interval between the date of receipt of the original literature and publication of the abstracts will not exceed eight months: This time interval is near to that achieved by monthly abstracting journals, com pared to which our system of accumulating abstracts for about six months offers the advantage of greater convenience for the user. I, 1980; some older Volume 27 contains literature published in 1980 and received before August literature which was received late and which is not recorded in earlier volumes is also included. We acknowledge with thanks contributions to this volume by Dr. J. Bouska, Prague, who surveyed journals and publications in Czech and supplied us with abstracts in English.

History and Progress of AFCRL Jan 1961 June 1962

The rim of the sun taken by the coronagraph at Sacramento Peak shows the sun's chromosphere during a relatively quiet ... During the period , the Observatory's study of motions in the solar atmosphere was extended to the hydrogen alpha ...

History and Progress of AFCRL  Jan  1961 June 1962