Results 111 to 120 of about 1,877,814 (242)

Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes [PDF]

, 2013
We present observational evidence for the presence of MHD (magnetohydrodynamic) waves in the solar photosphere deduced from SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) Dopplergram velocity observations.
Shelyag, S., Thompson, Michael John, Zharkov, Sergei, Zharkov, S., M. J. Thompson, Fedun, V., S. Zharkov, Shelyag, Sergiy, Erdélyi, Robert, R. Erdélyi, Erdelyi, R., S. Shelyag, V. Fedun, Fedun, Viktor, Thompson, M.J.   +14 more
core   +2 more sources

Polar Filaments Capture High-latitude Solar Poloidal Field Interactions and Can Foretell the Future Sunspot Cycle Amplitude before Polar Field Precursors

The Astrophysical Journal Letters
Polar fields at the minimum of a sunspot cycle—which are a manifestation of the radial component of the Sun’s poloidal field—are deemed to be the best indicator of the strength of the toroidal component and hence, the amplitude of the future sunspot ...
Srinjana Routh, Shaonwita Pal, Dibyendu Nandy, Subhamoy Chatterjee, Dipankar Banerjee, Mohd. Saleem Khan   +5 more
doaj   +1 more source

International Guideline on the Diagnosis, Treatment, and Monitoring of Long‐Chain Fatty Acid Oxidation Disorders (LC‐FAOD)

Journal of Inherited Metabolic Disease, Volume 49, Issue 5, September 2026.
ABSTRACT Long‐chain fatty acid oxidation disorders (LC‐FAOD) are rare inherited defects of mitochondrial β‐oxidation that impair energy generation during fasting or metabolic stress. Clinical manifestations range from neonatal hypoketotic hypoglycemia and cardiomyopathy to hepatopathy, recurrent rhabdomyolysis, and chronic myopathy.
Sarah C. Grünert, Kaustuv Bhattacharya, Daniela Karall, Mirjam Langeveld, Fran Rohr, Gepke Visser, Jerry Vockley, Aileen Kenneson, Rani H. Singh, Ute Spiekerkoetter, International LC‐FAOD Guideline Workgroup, Georgianne L. Arnold, Kiera Batten, Terry G. J. Derks, Patrick Forny, Melanie B. Gillingham, Emma Glamuzina, Anita Inwood, Monika Jörg‐Streller, Erle Kristensen, Svetlana Lajic, Alexander Laemmle, Risto Lapatto, Elena Martín‐Hernández, Diego Martinelli, Mel McSweeney, Sonia Moreira, Margot F. Mulder, Anna Nordenström, Bryony Ryder, Marit Schwantje, Ida Vanessa D. Schwartz, Arthavan Selvanathan, Serap Sivri, Maren Thiel, Pilar Quijada‐Fraile, Johan L. K. Van Hove, Yilmaz Yildiz   +37 more
wiley   +1 more source

The lost sunspot cycle: New support from

, 2015
It has been suggested that the shortage in the number of spots on the surface of the Sun between 1790 and 1830, known as the Dalton minimum, contained an extra cycle that was not identified in the original sunspot record by Wolf.
C. Karoff, M. F. Knudsen, A. Fogtmann-Schulz, F. Inceoglu, J. Olsen   +4 more
core   +1 more source

Extraction of Sunspots from Chinese Sunspot Drawings Based on Semisupervised Learning

The Astrophysical Journal
China has six observing stations, providing over 52,000 handwritten sunspot drawings from 1947–2016. The observing stations are the Purple Mountain Astronomical Observatory (PMO), Yunnan Astronomical Observatory (YNAO), Qingdao Observatory Station (QDOS),
Qianqian Dong, Yunfei Yang, Song Feng, Wei Dai, Bo Liang, Jianping Xiong   +5 more
doaj   +1 more source

Macroanatomical, Histological, Histochemical and Ultrastructural Characterisation of the Kidney in the Aksaray Malakli Dog: First Comprehensive Renal Morphological Study of the Breed

Veterinary Medicine and Science, Volume 12, Issue 5, September 2026.
This study provides the first comprehensive macroanatomical, histological, histochemical and scanning electron microscopic characterisation of the kidney in the Aksaray Malaklı dog. Key findings include normal canine renal architecture, absence of acidic polysaccharides, PAS‐positive basement membranes, and a previously unreported breed‐specific ...
Hatice Yaren Kuloğlu, Işık Tuncer, Ramazan İlgün, Kenan Erdoğan   +3 more
wiley   +1 more source

An Operational Daily‐Filtered Dominion Radio Astrophysical Observatory F10.7 cm Solar Radio Flux Product

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract The F10.7 solar radio flux density, or F10.7, is a disk‐integrated measure of the Sun's total emission at 10.7 cm (2.8 GHz) and is a widely‐used proxy of solar activity. F10.7 emissions primarily originate from the Sun's upper chromosphere and lower corona. High‐frequency, transient “radio bursts” can dramatically increase the magnitude of F10.
C. Kuester, O. M. Coddington, C. Lindholm, C. L. Peck   +3 more
wiley   +1 more source

Periodicities in sunspot activity during solar cycle 23

, 2006
Aims.The data of sunspot numbers, sunspot areas and solar flare index during cycle 23 are analyzed to investigate the intermediate-term periodicities. Methods.Power spectral analysis has been performed separately for the data of the whole disk,
P. K. Manoharan, Bhuwan Joshi, P. Pant
core   +1 more source

An Improved Prediction of Solar Cycles 25 and 26 Using the Informer Model: Gnevyshev Peaks and North–South Asymmetry

The Astrophysical Journal
Forecasting the amplitude and timing of the sunspot cycle is highly important for solar physics and space weather applications, but high-precision prediction of solar magnetic activity has remained an outstanding challenge.
Jie Cao, Tingting Xu, Linhua Deng, Xueliang Zhou, Shangxi Li, Yuxia Liu, Wenhua Wang, Weihong Zhou   +7 more
doaj   +1 more source

A Solar Analog Model for Decrease in Far Ultraviolet Irradiance Under a Grand Minimum

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Solar analog field stars having a range of magnetic activity can provide an estimate of solar spectral irradiance (SSI) variability relevant to understanding the Sun's influence on terrestrial climate. This approach is particularly useful for far ultraviolet (FUV) irradiance that cannot be observed from the Earth surface.
D. Lubin, C. Melis, D. Tytler
wiley   +1 more source