Results 71 to 80 of about 14,709 (209)

The EUV spectrum of the Sun: SOHO CDS NIS radiances during solar cycle 23 [PDF]

, 2014
For the first time, we present and discuss EUV radiances of the solar transition region (TR) and corona obtained during a solar cycle. The measurements were obtained with the SOHO/coronal diagnostic spectrometer (CDS) during the period from 1996 to 2010.
Andretta, V., Del Zanna, G.
core   +1 more source

Mental Health Promotion Through Nursing Interventions Focused on Anxiety, Sleep and Well‐Being: A Scoping Review

International Journal of Mental Health Nursing, Volume 35, Issue 2, April 2026.
ABSTRACT Anxiety is more prevalent than other mental disorders and maintains a bidirectional relationship with sleep disturbances, negatively affecting well‐being and overall mental health. This scenario underscores the need to strengthen and qualify nursing practice in addressing these outcomes.
Louise Constancia de Melo Alves Silva, Samia Valeria Ozorio Dutra, Barbara Fernandes Ferreira, Yenifer Lizeth Gañan Rojas, Kauanny Vitoria Gurgel dos Santos, Carlos Jordão Assis de Silva, Hylarina Maria Montenegro Diniz Silva, Kátia Regina Barros Ribeiro, Daniele Vieira Dantas, Rodrigo Assis Neves Dantas   +9 more
wiley   +1 more source

Ion Temperatures in the Quiet Solar Corona

The Astrophysical Journal, 2007
We measure the upper and lower limits of the temperatures Ti for a number of ions observed in the quiescent solar corona from 1996 to 2000, in order to compare with the measured electron temperature Te and test the assumption Ti = Te commonly adopted to measure the plasma nonthermal velocity vnth.
openaire   +1 more source

Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling

The Astrophysical Journal
Potential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes.
Stephan G. Heinemann, Jens Pomoell, Manuela Temmer   +2 more
doaj   +1 more source

Searching for Rotational X‐Ray Modulation on TIC 277539431

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT TIC 277539431, a fast rotating M7 dwarf, was detected to host the highest latitude flare to date at 81°$$ {81}^{{}^{\circ}} $$. Magnetic activity like stellar flares occurring at high latitude indicate occurrence of coronal loops at these latitudes on fully‐convective M dwarfs. In contrast, sunspots usually occur below 30°$$ {30}^{{}^{\circ}} $
Desmond Dsouza, Katja Poppenhäger, Ekaterina Ilin   +2 more
wiley   +1 more source

EXPLAINING INVERTED-TEMPERATURE LOOPS IN THE QUIET SOLAR CORONA WITH MAGNETOHYDRODYNAMIC WAVE-MODE CONVERSION [PDF]

The Astrophysical Journal, 2016
ABSTRACT Coronal loops trace out bipolar, arch-like magnetic fields above the Sun’s surface. Recent measurements that combine rotational tomography, extreme-ultraviolet imaging, and potential-field extrapolation have shown the existence of large loops with inverted-temperature profiles, i.e., loops for which the apex temperature is a ...
Avery J. Schiff, Steven R. Cranmer
openaire   +2 more sources

The Plasma β in Quiet Sun Regions: Multi-instrument View

The Astrophysical Journal
A joint campaign of several spaceborne and ground-based observatories, such as the GREGOR solar telescope, the Extreme-ultraviolet Imaging Spectrometer (EIS), and the Interface Region Imaging Spectrograph (Hinode Observing Plan 381, 2019 October 11–22 ...
Jenny M. Rodríguez-Gómez, Christoph Kuckein, Sergio J. González Manrique, Jonas Saqri, Astrid Veronig, Peter Gömöry, Tatiana Podladchikova   +6 more
doaj   +1 more source

Relating magnetic reconnection to coronal heating

, 2015
It is clear that the solar corona is being heated and that coronal magnetic fields undergo reconnection all the time. Here we attempt to show that these two facts are in fact related - i.e. coronal reconnection generates heat.
Longcope, Dana W., Tarr, Lucas A.
core   +1 more source

Periodic Density Structures Observed in Ulysses Data: First Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Periodic density structures (PDSs) are advecting quasi‐periodic (periodicities between several minutes and several hours) density enhancements observed in the solar wind and corona. There is strong evidence that PDSs are formed at the Sun.
Brent M. Randol, Nicholeen Viall, Larry Kepko, Simone Di Matteo   +3 more
wiley   +1 more source

Structuring of the quiet solar corona [PDF]

Die Aufheizung der Sonnenkorona, der dünnen äußeren Atmosphäre der Sonne, ist seit Jahrzehnten eine der wichtigsten offenen Fragen der Sonnenphysik. Wie das koronale Plasma oberhalb der viel kühleren Photosphäre Millionen von Grad erreicht, hängt eng mit dem Magnetfeld der Sonne zusammen. Das Feld durchdringt die Sonnenatmosphäre und prägt verschiedene
openaire   +1 more source