scholarly journals Ages of radio pulsar: long-term magnetic field evolution

2018 ◽  
Vol 482 (3) ◽  
pp. 3415-3425 ◽  
Author(s):  
Andrei P Igoshev
Keyword(s):  
Magnetic Field ◽  
Radio Pulsar ◽  
Field Evolution

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Magnetic Field Evolution in Merging Clusters of Galaxies

1999 ◽  
Vol 518 (2) ◽  
pp. 594-602 ◽  
Author(s):  
Kurt Roettiger ◽  
James M. Stone ◽  
Jack O. Burns
Keyword(s):  
Magnetic Field ◽  
Clusters Of Galaxies ◽  
Field Evolution

High magnetic-field evolution of the in-plane angular magnetoresistance of electron-doped Sr1−xLaxCuO2 in the normal state

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
V. P. Jovanović ◽  
H. Raffy ◽  
Z. Z. Li ◽  
G. Reményi ◽  
P. Monceau
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Normal State ◽  
Field Evolution

scholarly journals Long-term magnetic field stability of Vega

2012 ◽  
Author(s):  
D. Alina ◽  
P. Petit ◽  
F. Lignières ◽  
G. A. Wade ◽  
R. Fares ◽  
...  
Keyword(s):  
Magnetic Field

scholarly journals Long-term evolution of the heliospheric magnetic field inferred from cosmogenic 44Ti activity in meteorites

2018 ◽  
Vol 610 ◽  
pp. A28 ◽  
Author(s):  
S. Mancuso ◽  
C. Taricco ◽  
P. Colombetti ◽  
S. Rubinetti ◽  
N. Sinha ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Ice Cores ◽  
Long Term Evolution ◽  
Galactic Cosmic Rays ◽  
Sunspot Activity ◽  
Cosmogenic Isotopes ◽  
Heliospheric Magnetic Field ◽  
The Past ◽  
Term Evolution

Typical reconstructions of historic heliospheric magnetic field (HMF) BHMF are based on the analysis of the sunspot activity, geomagnetic data or on measurement of cosmogenic isotopes stored in terrestrial reservoirs like trees (14C) and ice cores (10Be). The various reconstructions of BHMF are however discordant both in strength and trend. Cosmogenic isotopes, which are produced by galactic cosmic rays impacting on meteoroids and whose production rate is modulated by the varying HMF convected outward by the solar wind, may offer an alternative tool for the investigation of the HMF in the past centuries. In this work, we aim to evaluate the long-term evolution of BHMF over a period covering the past twenty-two solar cycles by using measurements of the cosmogenic 44Ti activity (τ1∕2 = 59.2 ± 0.6 yr) measured in 20 meteorites which fell between 1766 and 2001. Within the given uncertainties, our result is compatible with a HMF increase from 4.87-0.30+0.24 nT in 1766 to 6.83-0.11+0.13 nT in 2001, thus implying an overall average increment of 1.96-0.35+0.43 nT over 235 years since 1766 reflecting the modern Grand maximum. The BHMF trend thus obtained is then compared with the most recent reconstructions of the near-Earth HMF strength based on geomagnetic, sunspot number, and cosmogenic isotope data.

Search for long term variations of the interplanetary magnetic field

Solar Physics ◽  
1975 ◽  
Vol 45 (1) ◽  
pp. 241-254 ◽  
Author(s):  
F. Mariani ◽  
L. Diodato ◽  
G. Moreno
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Long Term Variations

scholarly journals Response of the solar atmosphere to magnetic field evolution in a coronal hole region

2009 ◽  
Vol 501 (2) ◽  
pp. 745-753 ◽  
Author(s):  
S. H. Yang ◽  
J. Zhang ◽  
C. L. Jin ◽  
L. P. Li ◽  
H. Y. Duan
Keyword(s):  
Magnetic Field ◽  
Coronal Hole ◽  
Solar Atmosphere ◽  
Field Evolution

scholarly journals Repeat station data compared to a global geomagnetic field model

2013 ◽  
Vol 55 (6) ◽  
Author(s):  
Monika Korte ◽  
Vincent Lesur
Keyword(s):  
Magnetic Field ◽  
Secular Variation ◽  
Global Model ◽  
Time Interval ◽  
Night Time ◽  
Core Field ◽  
Repeat Station ◽  
Station Data ◽  
Long Term Trends

<p>Geomagnetic repeat station surveys with local variometers for improved data reductions have been carried out in Germany for about ten years. For nearly the same time interval the satellites Ørsted and CHAMP have provided a good magnetic field data coverage of the whole globe. Recent global field models based on these satellite data together with geomagnetic observatory data provide an improved description of the core field and secular variation. We use the latest version of the GFZ Reference Internal Magnetic Model to compare the magnetic field evolution predicted by that model between 2001 and 2010 to the independent repeat station data collected over the same time interval in Germany. Estimates of crustal bias at the repeat station locations are obtained as averages of the residuals, and the scatter or trend around each average provides information about influences in the data from field sources not (fully) described by the global model. We find that external magnetic field signal in the order of several nT, including long-term trends, remains both in processed annual mean and quiet night time repeat station data. We conclude that the geomagnetic core field secular variation in this area is described to high accuracy (better than 1 nT/yr) by the global model. Weak long-term trends in the residuals between repeat station data and the model might indicate induced lithospheric anomalies, but more data are necessary for a robust analysis of such signals characterized by very unfavorable signal-to-noise ratio.</p>

scholarly journals Long-term Evolution of the Sun’s Magnetic Field during Cycles 15–19 Based on Their Proxies from Kodaikanal Solar Observatory

2020 ◽  
Vol 902 (1) ◽  
pp. L15
Author(s):  
Alexander V. Mordvinov ◽  
Bidya Binay Karak ◽  
Dipankar Banerjee ◽  
Subhamoy Chatterjee ◽  
Elena M. Golubeva ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Long Term Evolution ◽  
Solar Observatory ◽  
Term Evolution
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