Results 51 to 60 of about 1,379,332 (142)

Oscillations observed in umbra, plage, quiet-Sun and the polarity inversion line of active region 11158 using Helioseismic Magnetic Imager/Solar Dynamics Observatory data. [PDF]

Philos Trans A Math Phys Eng Sci, 2021
Norton AA, Stutz RB, Welsch BT.
europepmc   +1 more source

The Ne/O abundance ratio in the quiet Sun

, 2005
Context. Aims.To determine the neon-to-oxygen abundance in the quiet Sun, a proxy for the photospheric abundance ratio. Methods.An emission measure method applied to extreme ultraviolet emission lines of Ne iv ...
P. R. Young
core   +1 more source

Long-Lived Particles and the Quiet Sun [PDF]

The nuclear reaction network within the interior of the Sun is an efficient MeV physics factory, and can produce long-lived particles generic to dark sector models.
Plestid, Ryan, Gustafson, R. Andrew, Zhou, Albert, Shoemaker, Ian M.   +3 more
core   +1 more source

An In-depth Analysis of Quiet-Sun IRIS Brightenings

The Astrophysical Journal
Small-scale brightenings are ubiquitous, dynamic, and energetic phenomena found in the chromosphere. An advanced filter-detection algorithm applied to high-resolution observations from the Interface Region Imaging Spectrograph enables the detection of ...
Llŷr Dafydd Humphries, Huw Morgan, David Kuridze   +2 more
doaj   +1 more source

DEM study of selected quiet sun regions

, 2001
In the present work EUV spectra of quiet Sun regions, observed with the Coronal Diagnostic Spectrometer (CDS) on SOHO, are analysed in order to determine the Differential Emission Measure (DEM) of selected areas of the field of view.
Vial, J. C., Gontikakis, C., Landi, E., Dara, H. C., Alissandrakis, C. E.   +4 more
core  

Variability of the EUV quiet Sun emission and reference spectrum using SUMER

, 2004
This paper aims to build a quiet Sun EUV reference spectrum from the SOHO – SUMER database. We make use of  750 quiet Sun spectra spread over a large range of solar activity. They are carefully calibrated both in terms of frequency and intensity.
M. Kretzschmar, Lilensten, Jean, J. Aboudarham, Aboudarham, Jean, J. Lilensten, Kretzschmar, Matthieu   +5 more
core   +1 more source

Puzzling Variation of Gamma Rays from the Sun over the Solar Cycle Revealed with Fermi-LAT

The Astrophysical Journal Letters
The steady-state gamma-ray emission from the Sun is thought to consist of two emission components due to interactions with Galactic cosmic rays: (1) a hadronic disk component, and (2) a leptonic extended component peaking at the solar edge and extending ...
A. Acharyya, A. Adelfio, M. Ajello, L. Baldini, C. Bartolini, D. Bastieri, J. Becerra Gonzalez, R. Bellazzini, B. Berenji, E. Bissaldi, R. D. Blandford, R. Bonino, E. Bottacini, S. Buson, R. A. Cameron, P. A. Caraveo, F. Casaburo, F. Casini, E. Cavazzuti, D. Cerasole, N. Cibrario, S. Ciprini, G. Cozzolongo, P. Cristarella Orestano, F. Cuna, A. Cuoco, S. Cutini, F. D’Ammando, D. Depalo, S. W. Digel, N. Di Lalla, L. Di Venere, A. Domínguez, A. Fiori, Y. Fukazawa, P. Fusco, F. Gargano, C. Gasbarra, D. Gasparrini, S. Germani, F. Giacchino, N. Giglietto, M. Giliberti, F. Giordano, M. Giroletti, S. Guiriec, R. Gupta, M. Hashizume, E. Hays, J. W. Hewitt, A. Holzmann Airasca, D. Horan, X. Hou, T. Kayanoki, M. Kuss, S. Larsson, A. Laviron, J. Li, A. Liguori, I. Liodakis, P. Loizzo, F. Longo, F. Loparco, S. López Pérez, L. Lorusso, M. N. Lovellette, P. Lubrano, S. Maldera, A. Manfreda, G. Martí-Devesa, R. Martinelli, M. N. Mazziotta, J. E. McEnery, I. Mereu, M. Michailidis, P. F. Michelson, N. Mirabal, T. Mizuno, P. Monti-Guarnieri, M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, N. Omodei, E. Orlando, J. F. Ormes, D. Paneque, G. Panzarini, M. Persic, M. Pesce-Rollins, V. Petrosian, R. Pillera, G. Principe, S. Rainò, R. Rando, B. Rani, M. Razzano, A. Reimer, O. Reimer, M. Sánchez-Conde, P. M. Saz Parkinson, D. Serini, C. Sgrò, E. J. Siskind, P. Spinelli, D. Tak, L. Tibaldo, D. F. Torres, J. Valverde, Z. Wadiasingh, W. Zhang   +110 more
doaj   +1 more source

3D Simulations of the Quiet Sun Radio Emission at Millimeter and Submillimeter Wavelengths [PDF]

Geofísica Internacional, 2008
We present 2D projections of 3D simulations of the quiet-sun radio-emission, at different frequencies on the centimeter-submillimeter wavelength range (specifically at 1.4, 3.9, 17, 34, 43, 110, 212 and 250 GHz). We have built a 3D, spherically symmetric,
E. Mendoza, A. Lara, V. de la Luz, M. Shimojo   +3 more
doaj  

Variations in the total electron content of the ionosphere at mid-latitudes during quiet sun conditions [PDF]

, 1965
Faraday rotation effect on satellite signals used to determine ionospheric electron content at midlatitudes during quiet sun ...
Solomon, S. L.
core  

Eruptions from quiet Sun coronal bright points. I. Observations

, 2018
<p>Movies for the 21 eruptions (aia_movies.tar) and 11 coronal bright point magnetic field evolution (hmi_movies.tar) presented in the manuscript "Eruptions from quiet Sun coronal bright points. I.  Observations",&
Galgaard, K., Chauzhou Mou, Madjarska, Maria S., Xia, Lidong, Lidong Xia, Madjarska, M., Xia, L., Galsgaard, Klaus, Klaus Galsgaard, Mou, C., Maria S. Madjarska, Mou, Chauzhou   +11 more
core   +1 more source