Results 51 to 60 of about 2,926 (125)

Long- and Mid-Term Variations of the Soft X-ray Flare Type in Solar Cycles

, 2017
Using data from the Geostationary Operational Environmental Satellites (GOES) spacecraft in the 1-8 \AA\ wavelength range for Solar Cycles 23, 24, and part of Cycles 21 and 22, we compare mean temporal parameters (rising, decay times, duration) and the ...
Belov, A. V., Chertok, I. M.
core   +1 more source

Preface to the special issue on “Old records for new knowledge”

Geoscience Data Journal, Volume 11, Issue 4, Page 357-364, October 2024.
Studying a changing world requires observations going back in time to extend and contextualize our latest scientific knowledge. Old legacy data exist in non‐digital formats. Thus, techniques and methodologies for the preservation, dissemination, interpretation, homogenization, calibration, and use of such legacy data and their associated metadata, as ...
Josep Batlló, Hisashi Hayakawa, Victoria Slonosky, Richard I. Crouthamel   +3 more
wiley   +1 more source

Latitude Quenching Nonlinearity in the Solar Dynamo

The Astrophysical Journal
We compare two candidate nonlinearities for regulating the solar cycle within the Babcock–Leighton paradigm: tilt quenching (whereby the tilt of active regions is reduced in stronger cycles) and latitude quenching (whereby flux emerges at higher ...
Anthony R. Yeates, Luca Bertello, Alexander A. Pevtsov, Alexei A. Pevtsov   +3 more
doaj   +1 more source

Design of the microelectromechanical logic element based on a comb-drive resonator

Научно-технический вестник информационных технологий, механики и оптики
CMOS technology has nearly reached the physical limits of transistor scaling and exhibits significant operational limitations at extreme temperatures and ionizing radiation.
A. A. Solovev, E. F. Pevtsov, V. A. Kolchuzhin   +2 more
doaj   +1 more source

Magnetic Helicity Evolution During the Solar Activity Cycle: Observations and Dynamo Theory

, 2003
We study a simple model for the solar dynamo in the framework of the Parker migratory dynamo, with a nonlinear dynamo saturation mechanism based on magnetic helicity conservation arguments.
Abramenko, Abramenko, Baliunas, Bao, Berger, Blackman, Blackman, Brandenburg, Brandenburg, Brandenburg, Brooke, Bruevich, Chae, Covas, D. Moss, D. Sokoloff, Dikpati, Field, Frisch, Galitski, H. Zhang, Hoyt, I. Rogachevskii, Iroshnikov, K. Kuzanyan, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kuzanyan, Longcope, N. Kleeorin, Parker, Pevtsov, Pevtsov, Pevtsov, Rogachevskii, Rogachevskii, Rust, Rüdiger, Seehafer, Sofia, Sokoloff, Spruit, Subramanian, Tavakol, Wang, Woltjer, Zhang, Zhang, Zhang, Zhang, Zhang   +55 more
core   +1 more source

Stellar Coronal and Wind Models: Impact on Exoplanets

, 2017
Surface magnetism is believed to be the main driver of coronal heating and stellar wind acceleration. Coronae are believed to be formed by plasma confined in closed magnetic coronal loops of the stars, with winds mainly originating in open magnetic field
A Maggio, A Morgenthaler, A Morgenthaler, A Reiners, A Reiners, A Reiners, A Strugarek, A Telleschi, A. Skumanich, AA Pevtsov, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA West, AF Lanza, B Holst van der, B Holst van der, B Zieger, BA Nicholson, BE Wood, BE Wood, BE Wood, BE Wood, BE Wood, BJ Wargelin, BO Demory, C Catala, C Garraffo, C Johnstone, C. P. Johnstone, CM Johns-Krull, CM Johns-Krull, CP Folsom, CP Johnstone, CP Johnstone, D Arzoumanian, D Bisikalo, D Buzasi, D Falceta-Gonçalves, D Lai, E Shkolnik, EF Guinan, EJ Gaidos, F Bagenal, G Anglada-Escudé, G Scandariato, GAJ Hussain, GAJ Hussain, GAJ Hussain, GHJ Oord van den, GW Pneuman, H Lammer, H Lammer, H Washimi, I Baraffe, I Pillitteri, I Ribas, I. Ribas, IA Waite, IA Waite, IA Waite, Ignasi Ribas, IV Sokolov, J Donati, J Donati, J Donati, J Donati, J Llama, J Morin, J Morin, J Morin, J Morin, J Sanz-Forcada, J Zendejas, Jackie Villadsen, JD Alvarado-Gómez, Jeremy Lim, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JH Debes, JI Zuluaga, JJG Lima, JM Grießmeier, JM Grießmeier, JV Hollweg, K Tsinganos, KG Kislyakova, L Hartmann, L. Mestel, M Guedel, M Guedel, M Güdel, M Jardine, M Jardine, MG Sterenborg, ML Khodachenko, ML Khodachenko, N Pizzolato, NJ Wright, O Cohen, O Cohen, O. Cohen, O. Cohen, P Lang, P Petit, P Petit, P Testa, R Fares, R Fares, R Fares, R Fares, R Keppens, R Pallavicini, RD Jeffries, Robert P. Kraft, Rui F. Pinto, RVE Lovelace, S Boro Saikia, S Boro Saikia, S Matt, S. V. Jeffers, SC Marsden, SC Marsden, SG Parsons, SH Yang, SK Solanki, SL Li, SP Matt, SR Cranmer, SR Cranmer, T Matsakos, T Matsumoto, Takuma Matsumoto, TE Holzer, Theresa Lüftinger, TK Suzuki, V Jatenco-Pereira, V Réville, V See, V. Bourrier, V. Bourrier, WH Ip   +162 more
core   +1 more source

Hemispheric Helicity Trend for Solar Cycle 24

, 2011
Using vector magnetograms obtained with the Spectro-polarimeter (SP) on aboard Hinode satellite, we studied two helicity parameters (local twist and current helicity) of 64 active regions occurred in the descending phase of solar cycle 23 and the ...
Bao, Bao, Choudhuri, Hagino, Hagino, Heyvaerts, Lites, Longcope, Moffatt, Pevtsov, Pevtsov, Su, Tiwari, Zhang, Zhang, Zhang   +15 more
core   +1 more source

On the Absence of Photospheric Net Currents in Vector Magnetograms of Sunspots Obtained From Hinode (SOT/SP) [PDF]

, 2009
Various theoretical and observational results have been reported regarding the presence/absence of net electric currents in the sunspots. The limited spatial resolution of the earlier observations perhaps obscured the conclusions.
Baty, Cuperman, Fan, Hagino, Harvey, Heinemann, Hurlburt, Ichimoto, P. Venkatakrishnan, Parker, Parker, Rachkowsky, Rempel, Rucklidge, Sakurai, Sanjiv Kumar Tiwari, Solanki, Tiwari, Tiwari, Unno, Weiss, Wheatland   +21 more
core   +1 more source

The Three-Dimensional Structure of a Sunspot Magnetic Field

, 2005
Here we report on observations of the three-dimensional structure of a sunspot magnetic field from the photosphere to the chromosphere, obtained with the new visible/infrared spectro-polarimeter SPINOR.
Socas-Navarro, H.
core   +1 more source

Helicity Observation of Weak and Strong Fields [PDF]

, 2006
We report in this letter our analysis of a large sample of photospheric vector magnetic field measurements. Our sample consists of 17200 vector magnetograms obtained from January 1997 to August 2004 by Huairou Solar Observing Station of the Chinese ...
Ai G., Hagino M., Mei Zhang, Ossendrijver M., Zhang H. Q.   +4 more
core   +2 more sources