Results 1 to 10 of about 28,762 (292)

The Extended Solar Cycle: Muddying the Waters of Solar/Stellar Dynamo Modeling or Providing Crucial Observational Constraints?

Frontiers in Astronomy and Space Sciences, 2018
In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle.
Abhishek K. Srivastava, Scott W. McIntosh, N. Arge, Dipankar Banerjee, Mausumi Dikpati, Bhola N. Dwivedi, Madhulika Guhathakurta, B.B. Karak, B.B. Karak, Robert J. Leamon, Robert J. Leamon, Shibu K. Matthew, Andres Munoz-Jaramillo, D. Nandy, Aimee Norton, L. Upton, S. Chatterjee, Rakesh Mazumder, Yamini K. Rao, Rahul Yadav   +19 more
doaj   +1 more source

Observational characteristics of oscillations and waves in and around sunspots. Difficulties in observing and interpreting

Solar-Terrestrial Physics
This paper summarizes the body of work that we have done over the years on the oscillation processes in sunspots, including their umbra, penumbra, and close vicinity.
Chelpanov A.A.
doaj   +1 more source

The magnetic origin of the outer boundaries of sunspots

Astronomy & Astrophysics
Context. Sunspot boundaries are commonly outlined by contours of the continuum intensity. However, their magnetic nature has not yet been fully characterised. Aims.
Schmassmann Markus, Bello González Nazaret, Jurčák Jan, Schlichenmaier Rolf   +3 more
doaj   +1 more source

Deciphering transmission spectra by exploring the solar paradigm

Astronomy & Astrophysics
Aims. Transmission spectroscopy allows to measure the wavelength dependence of the transit signal of an exoplanet, thus enabling probing of its atmospheric composition.
Nèmec N.-E., Porqueras-León Ò., Ribas I., Shapiro A. I.   +3 more
doaj   +1 more source

Science development study for the Atacama Large Aperture Submillimeter Telescope (AtLAST): Solar and stellar observations

Open Research Europe
Observations at (sub-)millimeter wavelengths offer a complementary perspective on our Sun and other stars, offering significant insights into both the thermal and magnetic composition of their chromospheres.
Sven Wedemeyer, Miroslav Barta, Roman Brajša, Yi Chai, Joaquim Costa, Dale Gary, Guillermo Gimenez de Castro, Stanislav Gunar, Gregory Fleishman, Antonio Hales, Hugh Hudson, Mats Kirkaune, Atul Mohan, Galina Motorina, Alberto Pellizzoni, Maryam Saberi, Caius L. Selhorst, Paulo J. A. Simoes, Masumi Shimojo, Ivica Skokić, Davor Sudar, Fabian Menezes, Stephen M. White, Mark Booth, Pamela Klaassen, Claudia Cicone, Tony Mroczkowski, Martin A. Cordiner, Luca Di Mascolo, Doug Johnstone, Eelco van Kampen, Minju Lee, Daizhong Liu, Thomas Maccarone, John Orlowski-Scherer, Amelie Saintonge, Matthew Smith, Alexander E. Thelen   +37 more
doaj   +1 more source

Observations of the Formation of a Proto-Spot in a Pre-Existing Field Environment

Universe
Bipolar emerging flux regions (EFRs) form active regions (ARs) that generally evolve into a pre-existing magnetic environment in the solar atmosphere. Reconfiguration of the small- and large-scale magnetic connectivities is invoked to explain a plethora ...
Mariarita Murabito, Ilaria Ermolli, Salvo L. Guglielmino, Paolo Romano, Fabrizio Giorgi   +4 more
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Solar Surface Magneto-Convection

Living Reviews in Solar Physics, 2012
We review the properties of solar magneto-convection in the top half of the convection zones scale heights (from 20 Mm below the visible surface to the surface, and then through the photosphere to the temperature minimum).
Robert F. Stein
doaj  

Where are Sunspots? The Practical Method of Galileo as an example of Mental Model

Zagadnienia Filozoficzne w Nauce, 2019
After the publication of Sidereus Nuncius, in the controversy with Ch. Scheiner, Galileo developed several arguments on behalf of the hypothesis that sunspots are contiguous to the surface of the Sun, and presented them in his Istoria e dimostrazioni ...
Tadeusz Sierotowicz
doaj  

Turbulent convection as a significant hidden provider of magnetic helicity in solar eruptions. [PDF]

Sci Rep, 2023
Toriumi S, Hotta H, Kusano K.
europepmc   +1 more source

Characterizing the Solar Activity Using the Visibility Graph Method. [PDF]

Entropy (Basel), 2023
Zurita-Valencia T, Muñoz V.
europepmc   +1 more source