Results 41 to 50 of about 4,747 (288)

Production of Sunspots and Their Effects on the Corona and Solar Wind: Insights from a New 3D Flux-Transport Dynamo Model

Frontiers in Astronomy and Space Sciences, 2018
We present a three-dimensional numerical model for the generation and evolution of the magnetic field in the solar convection zone, in which sunspots are produced and contribute to the cyclic reversal of the large-scale magnetic field. We then assess the
Rohit Kumar, Laurène Jouve, Rui F. Pinto, Alexis P. Rouillard   +3 more
doaj   +1 more source

The segregation of Calb1, Calb2, and Prph neurons reveals distinct and mixed neuronal populations and projections to hair cells in the inner ear and central nuclei

Developmental Dynamics, EarlyView.
Three populations of hair cells have a distinct expression of Calb1 and Calb2. (A, A′D) The central is highly positive for Calb1 while surrounding HC are positive for Calb2. Later, a calyx forms primarily with Calb1. (B, B′, D′, D″) Saccule and utricle start out positive for Calb2 but will upregulate the Calb1 in the striola that is primarily forming ...
Jeong Han Lee, Ebenezer N. Yamoah, Jennifer Kersigo, Karen Elliott, Niya LaRoda, Gabriela Pavlinkova, Bernd Fritzsch   +6 more
wiley   +1 more source

Sunspots [PDF]

, 2008
Introduction: Sunspots are some of the most notable features of the Sun. Use a telescope to track the changes in position and shape of sunspots over time.
McDonald Observatory, University of Texas at Austin   +1 more
core  

Statistical Comparison between Pores and Sunspots during the Time Interval 2010–2023

The Astrophysical Journal
To reveal the physical properties of pores and sunspots varying with solar cycle, we carried out a statistical comparison among pores, transitional sunspots, and mature sunspots using Solar Dynamics Observatory/Helioseismic and Magnetic Imager from 2010 ...
Yang Peng, Yu Fei, Nan-bin Xiang, Lin-hua Deng, Ting-ting Xu, Sheng Zheng, Shu-guang Zeng, Hai-yang Zhang, Shi-hu Liu   +8 more
doaj   +1 more source

Identification of beryllium hydride isotopomer lines in sunspot umbral spectra [PDF]

Serbian Astronomical Journal, 2008
A high resolution spectrum of FTS sunspot umbra of NSO/Kitt Peak was used to conduct a search for the molecular absorption lines due to BeH, BeD and BeT isotopomers. Analysis led to estimates of identification of the molecular lines of bands A - X (0,0),
Shanmugavel R., Bagare S.P., Rajamanickam N., Kumar Balachandra K.   +3 more
doaj   +1 more source

Rediscovering the observations of solar prominences from 1906 to 1957 recorded at the Madrid Astronomical Observatory

Journal of Space Weather and Space Climate, 2023
The Madrid Astronomical Observatory implemented a solar observation program from 1876 to 1986. In addition to sunspots, the observers at this observatory recorded other solar features such as prominences.
Aparicio Alejandro Jesús Pérez, Carrasco Víctor, Gallego María Cruz, Vaquero José Manuel   +3 more
doaj   +1 more source

Sunspot cycles

Economic Theory, 2003
This paper shows new properties about the equilibria of a stationary OG economy by establishing a connection between its stationary equilibria and those of a finite economy, with and without extrinsic uncertainty. Specifically, it shows the countability and local uniqueness with respect to the sup metric of the so-called sunspot cycles introduced here,
openaire   +3 more sources

Genetic epilepsies with myoclonic seizures: Mechanisms and syndromes

Epilepsia Open, EarlyView.
Abstract Genetic epilepsy with myoclonic seizures encompasses a heterogeneous spectrum of conditions, ranging from benign and self‐limiting forms to severe, progressive disorders. While their causes are diverse, a significant proportion stems from genetic abnormalities.
Antonietta Coppola, Marica Rubino, Antonella Riva, Pasquale Striano   +3 more
wiley   +1 more source

Nonlinear three-dimensional magnetoconvection around magnetic flux tubes [PDF]

, 2011
Magnetic flux in the solar photosphere forms concentrations from small scales, such as flux elements, to large scales, such as sunspots. This paper presents a study of the decay process of large magnetic flux tubes, such as sunspots, on a supergranular ...
Hurlburt, Neal, G. J. J. Botha, Hurlburt, N. E., A. M. Rucklidge, Botha, Gert, Rucklidge, AM, Rucklidge, A. M., Botha, G. J. J., Hurlburt, NE, Rucklidge, Alistair, N. E. Hurlburt, Botha, GJJ   +11 more
core   +1 more source

A Semi-Automatic Method to Measure the Rotation of Sunspots [PDF]

, 2021
Sunspots have been observed to undergo rotation about their umbral centre. This is typically a slow rotation, with even the fastest sunspot rotations only reaching angular velocities of a few degrees per hour.
Walker, Andrew, Brown, Daniel Stephen
core   +1 more source