Results 81 to 90 of about 41,536 (207)

White Light Coronograph (WLC) and Ultra-Violet Coronal Spectrometer (UVCS) [PDF]

The white light coronagraph (WLC) and ultraviolet coronal spectrometer (UVCS) together reveal the corona and the roots of the solar wind from 1.5 to 6 solar radii from Sun center.
Moore, R. L.
core   +1 more source

Measurements of Photospheric and Chromospheric Magnetic Fields

, 2015
The Sun is replete with magnetic fields, with sunspots, pores and plage regions being their most prominent representatives on the solar surface. But even far away from these active regions, magnetic fields are ubiquitous.
Centeno, Rebecca, Gosain, Sanjay, Harvey, Jack, Lagg, Andreas, Lites, Bruce   +4 more
core   +1 more source

Challenges in Forecasting the Evolution of a Distorted CME Observed During the First Close Solar Orbiter Perihelion

The Astrophysical Journal
Coronal Mass Ejections (CMEs), drivers of the most severe Space Weather disturbances, are often assumed to evolve self-similarly during their propagation.
Alessandro Liberatore, Carlos R. Braga, Manuela Temmer, Greta M. Cappello, Daniele Telloni, Paulett C. Liewer, Angelos Vourlidas, Marco Velli, Daniel Heyner, Hans-Ulrich Auster, Ingo Richter, Daniel Schmid, David Fischer, Christian Möstl   +13 more
doaj   +1 more source

Recurrent Jetlets Associated with the Disappearance of a Satellite Spot

The Astrophysical Journal
Recurrent small-scale eruptions are fascinating phenomena in the solar atmosphere, characterized by repeated energy buildup and release over short time intervals. However, their underlying physical mechanisms remain unclear.
Liheng Yang, Xiaoli Yan, Jun Zhang, Zhike Xue, Zhe Xu, Jincheng Wang, Yijun Hou, Yian Zhou, Defang Kong, Roslan Umar, Xinsheng Zhang, Qiaoling Li, Liping Yang   +12 more
doaj   +1 more source

A Double-decker Flux Rope Model for the Solar Eruption on 2012 March 10

The Astrophysical Journal
We present a magnetic configuration of a compound solar eruption observed on 2012 March 10, from NOAA AR 11429 near the disk center, which displayed a soft X-ray sigmoid before the eruption.
Nishu Karna, Suman Dhakal, Antonia Savcheva, Jie Zhang, Bernhard Kliem   +4 more
doaj   +1 more source

Exploring the Coronal Magnetic Field with Galactic Cosmic Rays: The Sun Shadow Observed by HAWC

The Astrophysical Journal
Galactic cosmic rays (GCRs) are charged particles that reach the heliosphere almost isotropically in a wide energy range. In the inner heliosphere, the GCR flux is modulated by solar activity so that only energetic GCRs reach the lower layers of the ...
R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, K. P. Arunbabu, D. Avila Rojas, R. Babu, E. Belmont-Moreno, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, P. Colín-Farias, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, C. de León, D. Depaoli, R. Diaz Hernandez, J. C. Díaz-Vélez, M. Durocher, M. A. DuVernois, K. Engel, C. Espinoza, K. L. Fan, N. Fraija, J. A. García-González, F. Garfias, A. Gonzalez Muñoz, M. M. González, J. A. Goodman, J. P. Harding, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, S. Kaufmann, A. Lara, J. Lee, H. León Vargas, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, T. Niembro, R. Noriega-Papaqui, N. Omodei, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, E. Ruiz-Velasco, J. Ryan, H. Salazar, D. Salazar-Gallegos, A. Sandoval, J. Serna-Franco, A. J. Smith, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Turner, F. Ureña-Mena, E. Varela, L. Villaseñor, X. Wang, I. J. Watson, E. Willox, S. Yun-Cárcamo, H. Zhou   +76 more
doaj   +1 more source

Waiting Time Distribution of Supra-arcade Downflows

The Astrophysical Journal Letters
Supra-arcade downflows (SADs) are dark, sunward-moving structures above the arcade of flare loops. Naturally, they are considered to be associated with outflows resulting from magnetic reconnection at the vertical current sheet beneath the eruptive ...
Zichao Yang, Rui Liu
doaj   +1 more source

Spatiotemporal organization of energy release events in the quiet solar corona

, 2014
Using data from STEREO and SOHO spacecraft, we show that temporal organization of energy release events in the quiet solar corona is close to random, in contrast to the clustered behavior of flaring times in solar active regions.
Davila, Joseph M., Uritsky, Vadim M.
core   +1 more source

Properties of Slow Magnetoacoustic Waves Observed Simultaneously Using Hi-C 2.1 and AIA

The Astrophysical Journal
Propagating slow magnetoacoustic waves are commonly observed in different coronal structures but are most prominent in active region fan loops. Their rapid damping with damping lengths of the order of a wavelength has been investigated in the past by ...
Suraj K. Tripathy, S. Krishna Prasad, D. Banerjee   +2 more
doaj   +1 more source

A zone of preferential ion heating extends tens of solar radii from Sun

, 2017
The extreme temperatures and non-thermal nature of the solar corona and solar wind arise from an unidentified physical mechanism that preferentially heats certain ion species relative to others.
Bale, Stuart D., Case, Anthony W., Kasper, Justin C., Klein, Kris G., Maksimovic, Milan, Maruca, Ben A., Stevens, Michael L., Weber, Tristan, Zaslavsky, Arnaud   +8 more
core   +3 more sources