Zobrazeno 1 - 10
of 90
pro vyhledávání: '"J. T. Hoeksema"'
Autor:
J. T. Hoeksema, S. A. Hess Webber, Yang Liu, Ruizhu Chen, M. Bobra, Marc L. DeRosa, Junwei Zhao
Solar wind models are highly dependent on global magnetic fields at the solar surface as their inner boundary condition, and the lack of global field data is a significant problem plaguing solar wi...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e5c5b23f570a51c0f6ee6ad0d8a52d6
https://doi.org/10.1002/essoar.10501416.1
https://doi.org/10.1002/essoar.10501416.1
Autor:
Philip H. Scherrer, R. S. Bogart, Sebastien Couvidat, Yijin Liu, J. T. Hoeksema, T. L. Duvall, Jesper Schou, R. I. Bush, Aimee A. Norton
Publikováno v:
Solar Physics. 291:1887-1938
NASA's Solar Dynamics Observatory (SDO) was launched 11 February 2010 with 3 instruments on board, including the Helioseismic and Magnetic Imager (HMI). Since beginning normal operations on 1 May 2010, HMI has observed the Sun's entire visible disk a
Publikováno v:
Solar Physics
The Helioseismic and Magnetic Imager (HMI) instrument is a major component of NASA's Solar Dynamics Observatory (SDO) spacecraft. Since beginning normal science operations on 1 May 2010, HMI has operated with remarkable continuity, e.g. during the mo
Autor:
Yang Liu, Keiji Hayashi, Jesper Schou, K. D. Leka, Aimee A. Norton, Graham Barnes, Rebecca Centeno, J. T. Hoeksema
Publikováno v:
Solar Physics. 289:3531-3547
The Very Fast Inversion of the Stokes Vector (VFISV) is a Milne-Eddington spectral line inversion code used to determine the magnetic and thermodynamic parameters of the solar photosphere from observations of the Stokes vector in the 6173 A Fe I line
Publikováno v:
Proceedings of the International Astronomical Union. 8:75-80
We study how the solar magnetic field evolves from antisymmetric (dipolar) to symmetric (quadrupolar) state during the course of its 11-yr cycle. We show that based on equatorial symmetries of the induction equation, flux transport solar mean field d
Publikováno v:
Proceedings of the International Astronomical Union. 8:25-36
Sunspot observations inspired solar dynamo theory and continue to do so. Simply counting them established the sunspot cycle and its period. Latitudinal distributions introduced the tough constraint that the source of sunspots moves equator-ward as th
Autor:
Keiji Hayashi, Sebastien Couvidat, J. T. Hoeksema, Thomas L. Duvall, Philip H. Scherrer, Xuepu Zhao, Xudong Sun, R. I. Bush, Jesper Schou, Yang Liu
Publikováno v:
Solar Physics. 279:295-316
We compare line-of-sight magnetograms from the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO) and the Michelson Doppler Imager (MDI) onboard the Solar and Heliospheric Observatory (SOHO). The line-of-sight magneti
Publikováno v:
Solar Physics. 270:9-22
The photospheric magnetic field in the Sun’s polar region is not well observed compared to the low-latitude regions. Data are periodically missing due to the Sun’s tilt angle, and the noise level is high due to the projection effect on the line-o
Publikováno v:
Solar Physics. 269:367-388
The solar cycle 23 minimum period has been characterized by a weaker solar and interplanetary magnetic field. This provides an ideal time to study how the strength of the photospheric field affects the interplanetary magnetic flux and, in particular,
Autor:
J. T. Hoeksema, James Mason
Publikováno v:
The Astrophysical Journal. 723:634-640
Flare occurrence is statistically associated with changes in several characteristics of the line-of-sight magnetic field in solar active regions (ARs). We calculated magnetic measures throughout the disk passage of 1075 ARs spanning solar cycle 23 to