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    Rights statement: This is the peer reviewed version of the following article: Jasinski, J. M., Arridge, C. S., Bader, A., Smith, A. W., Felici, M., Kinrade, J., et al. ( 2019). Saturn's open‐closed field line boundary: A Cassini electron survey at Saturn's magnetosphere. Journal of Geophysical Research: Space Physics, 124, 10018– 10035. doi: 10.1111/jpim.12206 which has been published in final form at https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JA027090 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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Saturn's open‐closed field line boundary: a Cassini electron survey at Saturn's magnetosphere

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Saturn's open‐closed field line boundary : a Cassini electron survey at Saturn's magnetosphere. / Jasinski, Jamie M.; Arridge, Chris; Bader, Alexander; Smith, Andrew; Felici, Marianna; Kinrade, Joe; Coates, A.J.; Jones, Geraint; Nordheim, T.; Gilbert, Lin; Azari, Abigail; Badman, Sarah; Provan, G.; Sergis, N.; Murphy, Neil.

In: Journal of Geophysical Research: Space Physics, Vol. 124, No. 12, 01.12.2019, p. 10018-10035.

Research output: Contribution to journalJournal article

Harvard

Jasinski, JM, Arridge, C, Bader, A, Smith, A, Felici, M, Kinrade, J, Coates, AJ, Jones, G, Nordheim, T, Gilbert, L, Azari, A, Badman, S, Provan, G, Sergis, N & Murphy, N 2019, 'Saturn's open‐closed field line boundary: a Cassini electron survey at Saturn's magnetosphere', Journal of Geophysical Research: Space Physics, vol. 124, no. 12, pp. 10018-10035. https://doi.org/10.1029/2019JA027090

APA

Jasinski, J. M., Arridge, C., Bader, A., Smith, A., Felici, M., Kinrade, J., Coates, A. J., Jones, G., Nordheim, T., Gilbert, L., Azari, A., Badman, S., Provan, G., Sergis, N., & Murphy, N. (2019). Saturn's open‐closed field line boundary: a Cassini electron survey at Saturn's magnetosphere. Journal of Geophysical Research: Space Physics, 124(12), 10018-10035. https://doi.org/10.1029/2019JA027090

Vancouver

Jasinski JM, Arridge C, Bader A, Smith A, Felici M, Kinrade J et al. Saturn's open‐closed field line boundary: a Cassini electron survey at Saturn's magnetosphere. Journal of Geophysical Research: Space Physics. 2019 Dec 1;124(12):10018-10035. https://doi.org/10.1029/2019JA027090

Author

Jasinski, Jamie M. ; Arridge, Chris ; Bader, Alexander ; Smith, Andrew ; Felici, Marianna ; Kinrade, Joe ; Coates, A.J. ; Jones, Geraint ; Nordheim, T. ; Gilbert, Lin ; Azari, Abigail ; Badman, Sarah ; Provan, G. ; Sergis, N. ; Murphy, Neil. / Saturn's open‐closed field line boundary : a Cassini electron survey at Saturn's magnetosphere. In: Journal of Geophysical Research: Space Physics. 2019 ; Vol. 124, No. 12. pp. 10018-10035.

Bibtex

@article{d948312b90094ac3add47d24fd88752e,
title = "Saturn's open‐closed field line boundary: a Cassini electron survey at Saturn's magnetosphere",
abstract = "We investigate the average configuration and structure of Saturn's magnetosphere in the nightside equatorial and high‐latitude regions. Electron data from the Cassini Plasma Spectrometer's Electron Spectrometer (CAPS‐ELS) is processed to produce a signal‐to‐noise ratio for the entire CAPS‐ELS time of operation at Saturn's magnetosphere. We investigate where the signal‐to‐noise ratio falls below 1, to identify regions in the magnetosphere where there is a significant depletion in the electron content. In the nightside equatorial region we use this to find that the most planetward reconnection x‐line location is at 20 – 25 RS downtail from the planet in the midnight to dawn sector. We also find an equatorial dawn‐dusk asymmetry at a radial distance of >20 RS which may indicate the presence of plasma depleted flux tubes returning to the dayside after reconnection in the tail. Furthermore, we find that the high‐latitude magnetosphere is predominantly in a state of constant plasma depletion and located on open field lines. We map the region of high‐latitude magnetosphere that is depleted of electrons to the polar cap to estimate the size and open flux content within the polar caps. The mean open flux content for the northern and southern polar caps are found to be 25±5 and 32±5 GWb, respectively. The average location of the open‐closed field boundary is found at invariant colatitudes of 12.7±0.6° and 14.5±0.6°. The northern boundary is modulated by planetary period oscillations more than the southern boundary.",
author = "Jasinski, {Jamie M.} and Chris Arridge and Alexander Bader and Andrew Smith and Marianna Felici and Joe Kinrade and A.J. Coates and Geraint Jones and T. Nordheim and Lin Gilbert and Abigail Azari and Sarah Badman and G. Provan and N. Sergis and Neil Murphy",
note = "This is the peer reviewed version of the following article: Jasinski, J. M., Arridge, C. S., Bader, A., Smith, A. W., Felici, M., Kinrade, J., et al. ( 2019). Saturn's open‐closed field line boundary: A Cassini electron survey at Saturn's magnetosphere. Journal of Geophysical Research: Space Physics, 124, 10018– 10035. doi: 10.1111/jpim.12206 which has been published in final form at https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JA027090 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. ",
year = "2019",
month = dec
day = "1",
doi = "10.1029/2019JA027090",
language = "English",
volume = "124",
pages = "10018--10035",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9402",
publisher = "Blackwell Publishing Ltd",
number = "12",

}

RIS

TY - JOUR

T1 - Saturn's open‐closed field line boundary

T2 - a Cassini electron survey at Saturn's magnetosphere

AU - Jasinski, Jamie M.

AU - Arridge, Chris

AU - Bader, Alexander

AU - Smith, Andrew

AU - Felici, Marianna

AU - Kinrade, Joe

AU - Coates, A.J.

AU - Jones, Geraint

AU - Nordheim, T.

AU - Gilbert, Lin

AU - Azari, Abigail

AU - Badman, Sarah

AU - Provan, G.

AU - Sergis, N.

AU - Murphy, Neil

N1 - This is the peer reviewed version of the following article: Jasinski, J. M., Arridge, C. S., Bader, A., Smith, A. W., Felici, M., Kinrade, J., et al. ( 2019). Saturn's open‐closed field line boundary: A Cassini electron survey at Saturn's magnetosphere. Journal of Geophysical Research: Space Physics, 124, 10018– 10035. doi: 10.1111/jpim.12206 which has been published in final form at https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JA027090 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - We investigate the average configuration and structure of Saturn's magnetosphere in the nightside equatorial and high‐latitude regions. Electron data from the Cassini Plasma Spectrometer's Electron Spectrometer (CAPS‐ELS) is processed to produce a signal‐to‐noise ratio for the entire CAPS‐ELS time of operation at Saturn's magnetosphere. We investigate where the signal‐to‐noise ratio falls below 1, to identify regions in the magnetosphere where there is a significant depletion in the electron content. In the nightside equatorial region we use this to find that the most planetward reconnection x‐line location is at 20 – 25 RS downtail from the planet in the midnight to dawn sector. We also find an equatorial dawn‐dusk asymmetry at a radial distance of >20 RS which may indicate the presence of plasma depleted flux tubes returning to the dayside after reconnection in the tail. Furthermore, we find that the high‐latitude magnetosphere is predominantly in a state of constant plasma depletion and located on open field lines. We map the region of high‐latitude magnetosphere that is depleted of electrons to the polar cap to estimate the size and open flux content within the polar caps. The mean open flux content for the northern and southern polar caps are found to be 25±5 and 32±5 GWb, respectively. The average location of the open‐closed field boundary is found at invariant colatitudes of 12.7±0.6° and 14.5±0.6°. The northern boundary is modulated by planetary period oscillations more than the southern boundary.

AB - We investigate the average configuration and structure of Saturn's magnetosphere in the nightside equatorial and high‐latitude regions. Electron data from the Cassini Plasma Spectrometer's Electron Spectrometer (CAPS‐ELS) is processed to produce a signal‐to‐noise ratio for the entire CAPS‐ELS time of operation at Saturn's magnetosphere. We investigate where the signal‐to‐noise ratio falls below 1, to identify regions in the magnetosphere where there is a significant depletion in the electron content. In the nightside equatorial region we use this to find that the most planetward reconnection x‐line location is at 20 – 25 RS downtail from the planet in the midnight to dawn sector. We also find an equatorial dawn‐dusk asymmetry at a radial distance of >20 RS which may indicate the presence of plasma depleted flux tubes returning to the dayside after reconnection in the tail. Furthermore, we find that the high‐latitude magnetosphere is predominantly in a state of constant plasma depletion and located on open field lines. We map the region of high‐latitude magnetosphere that is depleted of electrons to the polar cap to estimate the size and open flux content within the polar caps. The mean open flux content for the northern and southern polar caps are found to be 25±5 and 32±5 GWb, respectively. The average location of the open‐closed field boundary is found at invariant colatitudes of 12.7±0.6° and 14.5±0.6°. The northern boundary is modulated by planetary period oscillations more than the southern boundary.

U2 - 10.1029/2019JA027090

DO - 10.1029/2019JA027090

M3 - Journal article

VL - 124

SP - 10018

EP - 10035

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9402

IS - 12

ER -