Polar cap index as a proxy for hemispheric Joule heating

Francis K. Chun; Delores J. Knipp; Matthew G. McHarg; Gang Lu; Barbara A. Emery; Susanne Vennerstrøm; Oleg A. Troshichev

doi:10.1029/1999gl900196

Polar cap index as a proxy for hemispheric Joule heating

Geophysical Research Letters ◽

10.1029/1999gl900196 ◽

1999 ◽

Vol 26 (8) ◽

pp. 1101-1104 ◽

Cited By ~ 59

Author(s):

Francis K. Chun ◽

Delores J. Knipp ◽

Matthew G. McHarg ◽

Gang Lu ◽

Barbara A. Emery ◽

...

Keyword(s):

Joule Heating ◽

Polar Cap

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Ionospheric Conductivity Dependence of the Cross-Polar Cap Potential Difference and Global Joule Heating Rate

10.21236/ada220376 ◽

1988 ◽

Author(s):

B.-H. Ahn ◽

Y. Kamide ◽

S.-I. Akasofu ◽

H. W. Kroehl ◽

D. J. Gorney

Keyword(s):

Heating Rate ◽

Joule Heating ◽

Potential Difference ◽

Polar Cap ◽

Ionospheric Conductivity ◽

The Cross ◽

Cross Polar Cap Potential

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Spatial variation of Joule heating and its relationship with the motion of polar cap boundary

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011 ◽

10.1109/rast.2011.5966904 ◽

2011 ◽

Author(s):

Kalafatoglu Oner ◽

Emine Ceren ◽

Zerefsan Kaymaz

Keyword(s):

Spatial Variation ◽

Joule Heating ◽

Polar Cap

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Relationship between the Northern Hemisphere Joule heating and geomagnetic activity in the southern polar cap

Journal of Geophysical Research Atmospheres ◽

10.1029/1999ja000390 ◽

2000 ◽

Vol 105 (A12) ◽

pp. 27167-27177 ◽

Cited By ~ 4

Author(s):

P. Ballatore ◽

L. J. Lanzerotti ◽

G. Lu ◽

D. J. Knipp

Keyword(s):

Northern Hemisphere ◽

Geomagnetic Activity ◽

Joule Heating ◽

Polar Cap

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Joule heating patterns as a function of polar cap index

Journal of Geophysical Research Atmospheres ◽

10.1029/2001ja000246 ◽

2002 ◽

Vol 107 (A7) ◽

Cited By ~ 39

Author(s):

Francis K. Chun

Keyword(s):

Joule Heating ◽

Polar Cap

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Meso-scale observations of Joule heating near an auroral arc and ion-neutral collision frequency in the polar cap E-region

2011 XXXth URSI General Assembly and Scientific Symposium ◽

10.1109/ursigass.2011.6050955 ◽

2011 ◽

Author(s):

M. J. Kosch ◽

I. Yiu ◽

C. Anderson ◽

T. Tsuda ◽

Y. Ogawa ◽

...

Keyword(s):

Joule Heating ◽

Collision Frequency ◽

Polar Cap ◽

E Region ◽

Meso Scale

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Ionospheric conductivity dependence of the cross-polar cap potential difference and global Joule heating rate

Journal of Atmospheric and Terrestrial Physics ◽

10.1016/0021-9169(89)90001-9 ◽

1989 ◽

Vol 51 (11-12) ◽

pp. 841-850 ◽

Cited By ~ 5

Author(s):

B.H Ahn ◽

Y Kamide ◽

S.I Akasofu ◽

H.W Kroehl ◽

D.J Gorney

Keyword(s):

Heating Rate ◽

Joule Heating ◽

Potential Difference ◽

Polar Cap ◽

Ionospheric Conductivity ◽

The Cross ◽

Cross Polar Cap Potential

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A large rotating structure around AB Doradus A at VLBI scale

Proceedings of the International Astronomical Union ◽

10.1017/s1743921319009785 ◽

2019 ◽

Vol 15 (S354) ◽

pp. 189-194

Author(s):

J. B. Climent ◽

J. C. Guirado ◽

R. Azulay ◽

J. M. Marcaide

Keyword(s):

Magnetic Reconnection ◽

Main Sequence ◽

Complex Structure ◽

Main Sequence Star ◽

Polar Cap ◽

Vlbi Observations ◽

Rotating Structure ◽

Source Structure ◽

Expected Position

AbstractWe report the results of three VLBI observations of the pre-main-sequence star AB Doradus A at 8.4 GHz. With almost three years between consecutive observations, we found a complex structure at the expected position of this star for all epochs. Maps at epochs 2007 and 2010 show a double core-halo morphology while the 2013 map reveals three emission peaks with separations between 5 and 18 stellar radii. Furthermore, all maps show a clear variation of the source structure within the observing time. We consider a number of hypothesis in order to explain such observations, mainly: magnetic reconnection in loops on the polar cap, a more general loop scenario and a close companion to AB Dor A.

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