Sergis Nick


Nick Sergis
Research Associate

Biographical note

Dr. Nick Sergis was born in Athens on July 1973. He received his PhD in Astrophysics and Space Physics from the University of Athens in 2006. Since April 2006 he works as a Researcher at the Office of Space Research and Technology of the Academy of Athens and since February 2017 he is also an Adjunct Researcher at the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS) of the National Observatory of Athens (NOA). Dr. Sergis is a member of the Cassini/MIMI Scientific Team, the IAASARS Space Research and Technology Group and the Uranus Pathfinder Consortium. He has published 56 papers, 3 as invited book chapters and 53 in peer-reviewed scientific journals (Nature, Nature Physics, GRL, JGR, ApJL, Solar Physics etc.) with over 900 citations (h-index of 18). He has also chaired several conference sessions, presented more than 70 papers in international conferences and given over 20 invited talks and seminars. Dr. Sergis has been continuously serving as a reviewer for most scientific journals of his field (JGR, GRL, Space Science Reviews, Annales Geophysicae, etc.) and for proposals submitted for funding to NASA (NSPIRES system). In 2008, he was elected “best reviewer in the field” by the editorial board of Annales Geophysicae and in 2009 he received the “NASA Group Achievement Award” as a member of the Cassini/MIMI Team. Dr. Sergis is a co-leader of the Plasma Radial Transport Team, selected for funding by the International Space Science Institute (ISSI) in 2014. His research interests include Space and Planetary Physics, Magnetospheric Data Analysis with emphasis on the Outer Planets and their moons, Magnetosphere-Ionosphere Coupling, and Solar Wind Dynamics. He participates in a number of ongoing scientific collaborations with institutes from the USA, the UK, Germany and Argentina. Dr. Sergis has supervised or co-supervised one post graduate and over 15 undergraduate students. He is a member of the American Geophysical Union (AGU), the European Geosciences Union (EGU) and the International Astronomical Union (IAU).

A more detailed CV of Dr. N. Sergis can be found here:

Publications

Full list of peer-reviewed publications (total of 56 as of April 2017)

Book contributions (3)

1. Title: The Ring Current of Saturn, chapter in the Monograph:
     “Electric Currents in Geospace and Beyond” in press by AGU-Wiley, 2017.
      Author(s): Sergis, N., E. J. Bunce, J. F. Carbary, S. W. H. Cowley, X. Jia, D. C. Hamilton, S. M.     
      Krimigis, D. G. Mitchell, M. K. Dougherty.

2.Title: Sources of Local Time Asymmetries in Magnetodiscs, chapter in the book:  
     “The Magnetodiscs and Aurorae of Giant Planets” Published by Springer, 2015.
      Author(s): Arridge C. S., M. Kane, N. Sergis, K. K. Khurana, C. M. Jackman.

3.Title: Upstream of Saturn and Titan, chapter in the book:
     “The Plasma Environment of Venus, Mars, and Titan” Published by Springer, 2011.
      Author(s): Arridge, C. S.; Andre, N.; Bertucci, C. L.; Sergis, N.; et al.

In peer reviewed journals (53)

[1] Jasinsky, J. M., Arridge, C. S., Coates, A. J., Jones, G. H., Sergis, N., Thomsen, M. F., Krupp, N. 2017. Diamagnetic Depression Observations in Saturn's magnetospheric cusp. Journal of Geophysical Research (Space Physics), in-press.

[2] Masters, A., A. H. Sulaiman, L. Stawarz, M. Fujimoto, N. Sergis, D. Burgess, A. J. Coates, M. K. Dougherty. 2017. An in situ comparison of electron acceleration at collisionless plasma shock waves under differing upstream magnetic field orientations. The Astrophysical Journal Letters, in-press.

[3] Sergis, N., C. M. Jackman, M.F. Thomsen, S. M. Krimigis, D. G. Mitchell, D. C. Hamilton, M. K. Dougherty, N. Krupp, R. J. Wilson. 2017. Radial and Local Time structure of the Saturnian Ring Current, revealed by Cassini. Journal of Geophysical Research (Space Physics), 122, 1803-1815.  

[4] Sorba, A. M. N. A. Achilleos, P. Guio, C. S. Arridge, N. M. Pilkington, A. Masters, N. Sergis, A. J. Coates, M. K. Dougherty. 2017. Modeling the compressibility of Saturn's magnetosphere in response to internal and external influences Journal of Geophysical Research (Space Physics), 122, 1572-1589.

[5] Ramer, K. M., M. G. Kivelson, N. Sergis, K. K. Khurana, X. Jia. 2017. Spinning, Breathing, and Flapping: Periodicities in Saturn's Middle Magnetosphere. Journal of Geophysical Research (Space Physics), 122, 393-416.  

[6] Jasinski, J. M., Arridge, C. S., Coates, A. J., Jones, G. H., Sergis, N., Thomsen, M. F., Reisenfeld, D. B., Krupp, N., Waite, J. H. 2016. Cassini plasma observations of Saturn’s magnetospheric cusp. Journal of Geophysical Research (Space Physics) 121, 12.

[7] Jasinski, J. M., Slavin, J. A., Arridge, C. S., Poh, G., Jia, X., Sergis, N., Coates, A. J., Jones, G. H., Waite, J. H. 2016. Flux transfer event observation at Saturn’s dayside magnetopause by the Cassini spacecraft. Geophysical Research Letters 43, 6713-6723.

[8] Masters, A., Sulaiman, A. H., Sergis, N., Stawarz, L., Fujimoto, M., Coates, A. J., Dougherty, M. K. 2016. Suprathermal Electrons at Saturn’s Bow Shock. The Astrophysical Journal 826, 48.

[9] Arridge, C. S., and 17 colleagues 2016. Cassini in situ observations of long- duration magnetic reconnection in Saturns magnetotail. Nature Physics 12, 268- 271.

[10] Felici, M., and 10 colleagues 2016. Cassini observations of ionospheric plasma in Saturn’s magnetotail lobes. Journal of Geophysical Research (Space Physics) 121, 338-357.

[11] Paranicas, C., and 14 colleagues 2016. Effects of radial motion on interchange injections at Saturn. Icarus 264, 342-351.

[12] Pilkington, N. M., Achilleos, N., Arridge, C. S., Guio, P., Masters, A., Ray, L. C., Sergis, N., Thomsen, M. F., Coates, A. J., Dougherty, M. K. 2015. Internally driven large-scale changes in the size of Saturn’s magnetosphere. Journal of Geophysical Research (Space Physics) 120, 7289-7306.

[13] Pilkington, N. M., Achilleos, N., Arridge, C. S., Guio, P., Masters, A., Ray, L. C., Sergis, N., Thomsen, M. F., Coates, A. J., Dougherty, M. K. 2015. Asymmetries observed in Saturn’s magnetopause geometry. Geophysical Re- search Letters 42, 6890-6898.

[14] Carbary, J. F., Sergis, N., Mitchell, D. G., Krupp, N. 2015. Saturn’s hinge parameter from Cassini magnetotail passes in 2013-2014. Journal of Geophysical Research (Space Physics) 120, 4438-4445.

[15] Jackman, C. M., and 13 colleagues 2015. Field dipolarization in Saturn’s magnetotail with planetward ion flows and energetic particle flow bursts: Evidence of quasi-steady reconnection. Journal of Geophysical Research (Space Physics) 120, 3603-3617.

[16] Arridge, C. S., Kane, M., Sergis, N., Khurana, K. K., Jackman, C. M. 2015. Sources of Local Time Asymmetries in Magnetodiscs. Space Science Reviews 187, 301-333.

[17] Bertucci, C., Hamilton, D. C., Kurth, W. S., Hospodarsky, G., Mitchell, D., Sergis, N., Edberg, N. J. T., Dougherty, M. K. 2015. Titan’s interaction with the supersonic solar wind. Geophysical Research Letters 42, 193-200.

[18] Arridge, C. S., and 113 colleagues 2014. The science case for an orbital mission to Uranus: Exploring the origins and evolution of ice giant planets. Planetary and Space Science 104, 122-140.

[19] Masters, A., and 25 colleagues 2014. Neptune and Triton: Essential pieces of the Solar System puzzle. Planetary and Space Science 104, 108-121.

[20] Thomsen, M. F., and 12 colleagues 2014. Ion composition in interchange injection events in Saturn’s magnetosphere. Journal of Geophysical Research (Space Physics) 119, 9761-9772.

[21] Achilleos, N., Arridge, C. S., Bertucci, C., Guio, P., Romanelli, N., Sergis, N. 2014. A combined model of pressure variations in Titan’s plasma environment. Geophysical Research Letters 41, 8730-8735.

[22] Pilkington, N. M., Achilleos, N., Arridge, C. S., Masters, A., Sergis, N., Coates, A. J., Dougherty, M. K. 2014. Polar confinement of Saturn’s magnetosphere revealed by in situ Cassini observations. Journal of Geophysical Research (Space Physics) 119, 2858-2875.

[23] Masters, A., and 12 colleagues 2013. In situ observations of high-Mach number collisionless shocks in space plasmas. Plasma Physics and Controlled Fusion 55, 124035.

[24] Sergis, N., Jackman, C. M., Masters, A., Krimigis, S. M., Thomsen, M. F., Hamilton, D. C., Mitchell, D. G., Dougherty, M. K., Coates, A. J. 2013. Particle and magnetic field properties of the Saturnian magnetosheath: Presence and upstream escape of hot magnetospheric plasma. Journal of Geophysical Research (Space Physics) 118, 1620-1634.

[25] Masters, A., and 12 colleagues 2013. Electron acceleration to relativistic energies at a strong quasi-parallel shock wave. Nature Physics 9, 164-167.

[26] Badman, S. V., Masters, A., Hasegawa, H., Fujimoto, M., Radioti, A., Grodent, D., Sergis, N., Dougherty, M. K., Coates, A. J. 2013. Bursty magnetic reconnection at Saturn’s magnetopause. Geophysical Research Letters 40, 1027-1031.

[27] Masters, A., Eastwood, J. P., Swisdak, M., Thomsen, M. F., Russell, C. T., Sergis, N., Crary, F. J., Dougherty, M. K., Coates, A. J., Krimigis, S. M. 2012. The importance of plasma β conditions for magnetic reconnection at Saturn’s magnetopause. Geophysical Research Letters 39, L08103.

[28] Arridge, C. S., and 78 colleagues 2012. Uranus Pathfinder: exploring the origins and evolution of Ice Giant planets. Experimental Astronomy 33, 753-791.

[29] Arridge, C. S., and 10 colleagues 2011. Upstream of Saturn and Titan. Space Science Reviews 162, 25-83.

[30] Kellett, S., Arridge, C. S., Bunce, E. J., Coates, A. J., Cowley, S. W. H., Dougherty, M. K., Persoon, A. M., Sergis, N., Wilson, R. J. 2011. Saturn’s ring current: Local time dependence and temporal variability. Journal of Geophysical Research (Space Physics) 116, A05220.

[31] Sergis, N., Arridge, C. S., Krimigis, S. M., Mitchell, D. G., Rymer, A. M., Hamilton, D. C., Krupp, N., Dougherty, M. K., Coates, A. J. 2011. Dynamics and seasonal variations in Saturn’s magnetospheric plasma sheet, as measured by Cassini. Journal of Geophysical Research (Space Physics) 116, A04203.

[32] Brandt, P. C., Khurana, K. K., Mitchell, D. G., Sergis, N., Dialynas, K., Car- bary, J. F., Roelof, E. C., Paranicas, C. P., Krimigis, S. M., Mauk, B. H. 2010. Saturn’s periodic magnetic field perturbations caused by a rotating partial ring current. Geophysical Research Letters 37, L22103.

[33] Achilleos, N., Guio, P., Arridge, C. S., Sergis, N., Wilson, R. J., Thomsen, M. F., Coates, A. J. 2010. Influence of hot plasma pressure on the global structure of Saturn’s magnetodisk. Geophysical Research Letters 37, L20201.

[34] Kellett, S., Arridge, C. S., Bunce, E. J., Coates, A. J., Cowley, S. W. H., Dougherty, M. K., Persoon, A. M., Sergis, N., Wilson, R. J. 2010. Nature of the ring current in Saturn’s dayside magnetosphere. Journal of Geophysical Research (Space Physics) 115, A08201.

[35] Masters, A., and 11 colleagues 2010. Cassini observations of a Kelvin-Helmholtz vortex in Saturn’s outer magnetosphere. Journal of Geophysical Research (Space Physics) 115, A07225.

[36] Kanani, S. J., and 11 colleagues 2010. A new form of Saturn’s magnetopause using a dynamic pressure balance model, based on in situ, multi-instrument Cassini measurements. Journal of Geophysical Research (Space Physics) 115, A06207.

[37] Sergis, N., and 11 colleagues 2010. Particle pressure, inertial force, and ring current density profiles in the magnetosphere of Saturn, based on Cassini mea- surements. Geophysical Research Letters 37, L02102.

[38] Krimigis, S. M., Sergis, N., Dialynas, K., Mitchell, D. G., Hamilton, D. C., Krupp, N., Dougherty, M., Sarris, E. T. 2009. Analysis of a sequence of energetic ion and magnetic field events upstream from the Saturnian magnetosphere. Planetary and Space Science 57, 1785-1794.

[39] Krupp, N., and 15 colleagues 2009. Energetic particles in Saturn’s magnetosphere during the Cassini nominal mission (July 2004-July 2008). Planetary and Space Science 57, 1754-1768.

[40] Garnier, P., and 13 colleagues 2009. Titan’s ionosphere in the magnetosheath: Cassini RPWS results during the T32 flyby. Annales Geophysicae 27, 4257-4272.

[41] Masters, A., and 10 colleagues 2009. Hot flow anomalies at Saturn’s bow shock. Journal of Geophysical Research (Space Physics) 114, A08217.

[42] Sergis, N., Krimigis, S. M., Mitchell, D. G., Hamilton, D. C., Krupp, N., Mauk, B. H., Roelof, E. C., Dougherty, M. K. 2009. Energetic particle pressure in Saturn’s magnetosphere measured with the Magnetospheric Imaging Instrument on Cassini. Journal of Geophysical Research (Space Physics) 114, A02214.

[43] Roussos, E., Krupp, N., Armstrong, T. P., Paranicas, C., Mitchell, D. G., Krimigis, S. M., Jones, G. H., Dialynas, K., Sergis, N., Hamilton, D. C. 2008. Discovery of a transient radiation belt at Saturn. Geophysical Research Letters 35, L22106.

[44] Krimigis, S. M., Sergis, N., Mitchell, D. G., Hamilton, D. C., Krupp, N. 2007. A dynamic, rotating ring current around Saturn. Nature 450, 1050-1053.

[45] Dialynas, K., Babasides, G., Sergis, N., Moussas X. 2007. Electron impact ionization in the Martian ionosphere. Sixth International Conference of the Balkan Physical Union Volume: 899 Page: 549

[46] Sergis, N., Krimigis, S. M., Mitchell, D. G., Hamilton, D. C., Krupp, N., Mauk, B. M., Roelof, E. C., Dougherty, M. 2007. Ring current at Saturn: Energetic particle pressure in Saturn’s equatorial magnetosphere measured with Cassini/MIMI. Geophysical Research Letters 34, L09102.

[47] Sergis, N., Dialynas, K., Roussos, E., Moussas, X. 2006. Magnetospheric electron flows in the Martian ionosphere: detection and implications. Recent Advances in Astronomy and Astrophysics Volume: 848 Pages: 263-272.

[48] Sergis, N., Dialynas, K., Babasides, G., Moussas X. 2006. Determination of the most appropriate electron energy for the bow shock identification based on MGS data.
Recent Advances in Astronomy and Astrophysics Volume: 848 Pages: 163-167.

[49] Sergis, N., Moussas, X. 2003. The Martian Electron Foreshock, Based on Mars Global Surveyor’s Measurements. Solar Physics 218, 281-294.

[50] Sergis, N., Moussas, X. 2002. Ulf Waves at the Proton Gyrofrequency Upstream of the Martian bow Shock, Based on Mars Global Surveyor’s Measurements. Solar Physics 209, 409-419.

[51] Sergis, N., Moussas, X. 2001. On the smooth surface of the northern bow shock of Mars, based on Mars Global Surveyor’s measurements. Solar Physics 202, 191-200.

[52] Rovithis-Livaniou, H., Fragoulopoulou, E., Sergis, N., Rovithis, P., Kranidiotis, A. 2001. Study of the contact binary AK Herculis: Light-curve analysis and orbital period investigation. Astrophysics and Space Science 275, 337-348.

[53] Rovithis-Livaniou, H., Kranidiotis, A., Fragoulopoulou, E., Sergis, N., Rovithis, P. 1999. On the Orbital Period Changes of AK Herculis. Information Bulletin on Variable Stars 4713, 1.

 

Information and contact

Office of Space Research & Technology

Address:
4, Soranou Efesiou str., 11527 Athens

Tel.: +30 210 6597 639
Fax: +30 210 6597 641

e-mail: nsergis@phys.uoa.gr