TITLE

Coronal Temperature Profiles Obtained from Kinetic Models and from Coronal Brightness Measurements Obtained During Solar Eclipses

AUTHOR(S)
Pierrard, V.; Borremans, K.; Stegen, K.; Lemaire, J. F.
PUB. DATE
January 2014
SOURCE
Solar Physics;Jan2014, Vol. 289 Issue 1, p183
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Coronal density, temperature, and heat-flux distributions for the equatorial and polar corona have been deduced from Saito’s model of averaged coronal white-light (WL) brightness and polarization observations. These distributions are compared with those determined from a kinetic collisionless/exospheric model of the solar corona. This comparison indicates similar distributions at large radial distances (> 7 R ⊙) in the collisionless region. However, rather important differences are found close to the Sun in the acceleration region of the solar wind. The exospheric heat flux is directed away from the Sun, while that inferred from all WL coronal observations is in the opposite direction, i.e. conducting heat from the inner corona toward the chromosphere. This could indicate that the source of coronal heating extends up into the inner corona, where it maximizes at r>1.5 R ⊙, well above the transition region.
ACCESSION #
91933478

 

Related Articles

  • Coronal Mass Ejections Observed at the Total Solar Eclipse on 13 November 2012. Hanaoka, Yoichiro; Nakazawa, Jun; Ohgoe, Osamu; Sakai, Yoshiaki; Shiota, Kazuo // Solar Physics;Jul2014, Vol. 289 Issue 7, p2587 

    White-light observations of the total solar eclipse on 13 November 2012 were made at two sites, where the totality occurred 35 min apart. The structure of the corona from the solar limb to a couple of solar radii was observed with a wide dynamic range and a high signal-to-noise ratio. An ongoing...

  • ON THE SOLAR CORONA PETROGLYPH IN THE CHACO CANYON. Vaquero, José M.; Malville, J. McKim // Mediterranean Archaeology & Archaeometry;2014, Vol. 14 Issue 3, p189 

    Piedra del Sol is a free-standing rock in Chaco Canyon that marks June solstice sunrise. The petroglyph on the south face of Piedra del Sol in Chaco Canyon may depict the solar corona observed during the total solar eclipse of July 11, 1097 CE The southwest area of the rock contains features...

  • A Comparison Between Nonlinear Force-Free Field and Potential Field Models Using Full-Disk SDO/HMI Magnetogram. Tadesse, Tilaye; Wiegelmann, T.; MacNeice, P. J.; Inhester, B.; Olson, K.; Pevtsov, A. // Solar Physics;Mar2014, Vol. 289 Issue 3, p831 

    Measurements of magnetic fields and electric currents in the pre-eruptive corona are crucial to the study of solar eruptive phenomena, like flares and coronal mass ejections (CMEs). However, spectro-polarimetric measurements of certain photospheric lines permit a determination of the vector...

  • Coronal mass ejections. Gosling, J. T. // AIP Conference Proceedings;2000, Vol. 516 Issue 1, p59 

    The most dramatic changes in the solar corona occur during coronal mass ejections, or CMEs, during which solar material is propelled outward into the heliosphere from regions in the corona not previously participating in the solar wind expansion. These ejections often produce major solar wind...

  • The ARTEMIS Catalog of LASCO Coronal Mass Ejections. Boursier, Y.; Lamy, P.; Llebaria, A.; Goudail, F.; Robelus, S. // Solar Physics;Jun2009, Vol. 257 Issue 1, p125 

    The LASCO-C2 coronagraph aboard the SOHO solar observatory has been providing a continuous flow of coronal images since 1996. Synoptic maps for each Carrington rotation have been built from these images, and offer a global view of the temporal evolution of the solar corona, particularly the...

  • Coronal Dynamics and the AIA on SDO. Golub, L. // Space Science Reviews;May2006, Vol. 124 Issue 1-4, p23 

    We provide a brief overview of present-day studies of inner corona dynamics, with examples of mass ejections (CME), flares and active region dynamics. While the names of the topics have not changed in several decades, the internal details and the language used to express the nature of the...

  • Mushrooms in the Solar Corona. Veselovsky, I.; Panasenko, O. // Solar System Research;Sep2005, Vol. 39 Issue 5, p421 

    In the solar atmosphere a new phenomenon is discovered, namely, the formation, growth, and disappearance of mushrooms as a consequence of eruptive processes. This phenomenon gives an insight into many geometric and physical properties of coronal mass ejections (CME).

  • An Attempt to Detect Coronal Mass Ejections in Lyman- α Using SOHO Swan. Mays, M.L.; St. Cyr, O.C.; Quémerais, E.; Ferron, S.; Bertaux, J.-L.; Yashiro, S.; Howard, R. // Solar Physics;Mar2007, Vol. 241 Issue 1, p113 

    In this study, the possibility that coronal mass ejections (CMEs) may be observed in neutral Lyman-α emission was investigated. An observing campaign was initiated for SWAN (Solar Wind ANisotropies), a Lyman-α scanning photometer on board the Solar and Heliospheric Observatory (SOHO)...

  • Two Years of the STEREO Heliospheric Imagers. Harrison, Richard A.; Davies, Jackie A.; Rouillard, Alexis P.; Davis, Christopher J.; Eyles, Christopher J.; Bewsher, Danielle; Crothers, Steve R.; Howard, Russell A.; Sheeley, Neil R.; Vourlidas, Angelos; Webb, David F.; Brown, Daniel S.; Dorrian, Gareth D. // Solar Physics;May2009, Vol. 256 Issue 1/2, p219 

    Imaging of the heliosphere is a burgeoning area of research. As a result, it is awash with new results, using novel applications, and is demonstrating great potential for future research in a wide range of topical areas. The STEREO ( Solar TErrestrial RElations Observatory) Heliospheric Imager...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics