Download or read book Very Large Array Observations of the Sun With Related Observations Using the SMM Satellite written by Kenneth R. Lang and published by . This book was released on 1986 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations of solar active regions with the Very Large Array (VLA) and with the Solar Maximum Mission (SMM) satellite are providing new insights to the origin and prediction of solar activity. This activity includes bursts or flares that can disrupt the tracking of satellites, distort communication systems, and interfere with high-flying aircraft. These bursts originate in coronal loops that are uniquely studied with the VLA (at 20 cm wavelength) and with the SMM (at X-ray wavelengths). The research summarized includes discussions of coronal diagnostics, solar burst precursors, and energy build-up in coronal loops. We also discuss novel discoveries of coherent burst mechanisms on nearby active stars other than the sun. VLA observations of a solar noise storm (at 92-cm wavelength) have resolved the sources of storm radiation for the first time. Future VLA observations with the new 92-cm system will provide new information about the unknown processes that trigger and continually excite solar noise storms, while also providing insights to the unknown triggering mechanisms for decimetric bursts and coronal mass ejections. This report includes reprints, preprints or abstracts of articles prepared under this grant, Keywords: Solar radio radiation, Solar X rays; Preburst heating; Magnetic triggering of solar bursts; Compact variable sources; Coronal diagnostics; Solar noise storms; High-resolution microwave observations.

Download or read book Very Large Array Observations of the Sun with Related Observations Using the SMM Solar Maximum Mission Satellite written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple Wavelength Observations of Flaring Active Regions; Very Large Array Observations of Solar Active Regions III. Multiple Wavelength Observations. High-Resolution Observations of Solar Radio Bursts at 2, 6, and 20 cm Wavelength; The Circularly Polarized Sun at 12.6 cm Wavelength; Bright, Rapid, Highly Polarized Radio Spikes from the M Dwarf AD. Leonis; Possible Detection of Thermal Cyclotron Lines from Small Sources within Solar Active Regions. Observations of Preburst Heating and Magnetic Field Changes in a 20 cm Loop; The Structure of a Solar Active Region from RATAN-600 and Very Large Array Observations; The Solar-Stellar Connection; Short Term Prediction of Solar Bursts - Radio Wavelength Precursors; VLA Observations of Flare Build Up in Coronal Loops on the Sun and Solar Type Stars; VLA Observations of Narrow-Band Decimetric Burst Emission; VLA Observations of Solar Active Regions at Closely Spaced Frequencies: Evidence for Thermal Cyclotron Line Emission; VLA Observations of Compact, Variable Sources on the Sun; Flare Stars and Solar Bursts; High Resolution In Time and Frequency; Coronal Plasmas On The Sun and Nearby Stars; Coronal Diagnostics; Narrow-Band; Millisecond Radio Spikes From the Dwarf M Flare Star AD Leonis; VLA Observations of a Solar Noise Storm. (JHD).

Download or read book Very Large Array Observations of the Sun with Related Observations Using the SMM Solar Maximum Mission Satellite written by Kenneth R. Lang and published by . This book was released on 1988 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple Wavelength Observations of Flaring Active Regions; Very Large Array Observations of Solar Active Regions III. Multiple Wavelength Observations. High-Resolution Observations of Solar Radio Bursts at 2, 6, and 20 cm Wavelength; The Circularly Polarized Sun at 12.6 cm Wavelength; Bright, Rapid, Highly Polarized Radio Spikes from the M Dwarf AD. Leonis; Possible Detection of Thermal Cyclotron Lines from Small Sources within Solar Active Regions. Observations of Preburst Heating and Magnetic Field Changes in a 20 cm Loop; The Structure of a Solar Active Region from RATAN-600 and Very Large Array Observations; The Solar-Stellar Connection; Short Term Prediction of Solar Bursts - Radio Wavelength Precursors; VLA Observations of Flare Build Up in Coronal Loops on the Sun and Solar Type Stars; VLA Observations of Narrow-Band Decimetric Burst Emission; VLA Observations of Solar Active Regions at Closely Spaced Frequencies: Evidence for Thermal Cyclotron Line Emission; VLA Observations of Compact, Variable Sources on the Sun; Flare Stars and Solar Bursts; High Resolution In Time and Frequency; Coronal Plasmas On The Sun and Nearby Stars; Coronal Diagnostics; Narrow-Band; Millisecond Radio Spikes From the Dwarf M Flare Star AD Leonis; VLA Observations of a Solar Noise Storm. (JHD).

Download or read book Simultaneous Solar Maximum Mission Smm and Very Large Array Vla Observations of Solar Active Regions written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-27 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very Large Array observations at 20 cm wavelength can detect the hot coronal plasma previously observed at soft x ray wavelengths. Thermal cyclotron line emission was detected at the apex of coronal loops where the magnetic field strength is relatively constant. Detailed comparison of simultaneous Solar Maximum Mission (SMM) Satellite and VLA data indicate that physical parameters such as electron temperature, electron density, and magnetic field strength can be obtained, but that some coronal loops remain invisible in either spectral domain. The unprecedent spatial resolution of the VLA at 20 cm wavelength showed that the precursor, impulsive, and post-flare components of solar bursts originate in nearby, but separate loops or systems of loops.. In some cases preburst heating and magnetic changes are observed from loops tens of minutes prior to the impulsive phase. Comparisons with soft x ray images and spectra and with hard x ray data specify the magnetic field strength and emission mechanism of flaring coronal loops. At the longer 91 cm wavelength, the VLA detected extensive emission interpreted as a hot 10(exp 5) K interface between cool, dense H alpha filaments and the surrounding hotter, rarefield corona. Observations at 91 cm also provide evidence for time-correlated bursts in active regions on opposite sides of the solar equator; they are attributed to flare triggering by relativistic particles that move along large-scale, otherwise-invisible, magnetic conduits that link active regions in opposite hemispheres of the Sun. Willson, Robert F. Unspecified Center NASA-CR-187907, NAS 1.26:187907 NAG5-501...

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Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 1142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Literature 1989 Part 1 written by Astronomisches Rechen-Institut and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 1433 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the reviews: "Astronomy and Astrophysics Abstracts has appeared in semi-annual volumes since 1969 and it has already become one of the fundemental publications in the fields of astronomy, astrophysics and neighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. ...The abstracts 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." Space Science Review# "Dividing the whole field plus related subjects into 108 categories, each work is numbered and most are accompanied by brief abstracts. Fairly comprehensive cross-referencing links relevant papers to more than one category, and exhaustive author and subject indices are to be found at the back, making the catalogues easy to use. The series appears to be so complete in its coverage and always less than a year out of date that I shall certainly have to make a little more space on those shelves for future volumes." The Observatory Magazine#

Download or read book Government Reports Annual Index written by and published by . This book was released on 1989 with total page 1182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Energetic Phenomena on the Sun written by Mukul Ranjan Kundu and published by . This book was released on 1987 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Sun Earth and Sky written by Kenneth R. Lang and published by Springer Science & Business Media. This book was released on 2007-12-31 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in a light and friendly style, this lavishly illustrated book introduces the Sun and its physics, and describes all aspects of the Sun’s interaction with us on Earth. The second edition of this book updates the popular text by providing comprehensive accounts of the most recent discoveries made by five modern solar spacecraft during the past decade. It contains a number of images never before seen in print. Breakthrough observations with the underground Sudbury Neutrino Observatory are also included. The new edition further provides modern interpretations of ozone depletion and global warming.

Download or read book Sun and Planetary System written by W. Fricke and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Sixth European Regional Meeting in Astronomy, held in Dubrovnik, Yugoslavia, October 19-23, 1981