Poster presentation

Space Science Seminar

Wednesday, May 8, 2019 - 3:00pm to 4:00pm  ·  Space Science Seminar
Reka Winslow (UNH)

Abstract: Mercury is the only planet in the inner solar system, other than Earth, that possesses a dynamo-generated global, albeit weak, magnetic field. As a consequence of this weak field and the planet's proximity to the Sun, the magnetosphere of Mercury is highly dynamic, especially during times of interplanetary coronal mass ejections (ICMEs). It has been long hypothesized that the magnetic flux on Mercury's dayside may be completely eroded or compressed below the surface during extreme conditions.

Wednesday, April 3, 2019 - 3:00pm to 4:00pm  ·  Space Science Seminar
Dr. Vladimir Zhdankin from Princeton University
Abstract: Turbulence is ubiquitous in high-energy astrophysical systems such as pulsar wind nebulae, black-hole accretion flows, and jets. The plasmas in such systems are often collisionless and relativistic. I will describe recent numerical and theoretical progress on understanding turbulence in relativistic collisionless plasmas.
Wednesday, March 13, 2019 - 3:00pm to 4:00pm  ·  Space Science Seminar
Beket Tulegenov, Embry-Riddle Aeronautical University (ERAU)

Abstract: Ultra-Low Frequency (ULF) Alfvén waves carry significant fluxes of electromagnetic power along auroral magnetic field lines and play a major role in the redistribution of electromagnetic power, particle density, energy, mass, and momentum between the ionosphere and magnetosphere at high latitudes. A particularly important feature of these waves is their casual connection with discreet auroral arcs.

Wednesday, February 20, 2019 - 3:00pm to 4:00pm  ·  Space Science Seminar
Edgar A Bering III, Professor of Physics and ECE University of Houston

Abstract: This talk will review the physics of the bremsstrahlung X-ray emission process. The classical cross section and emission rates from thick targets will be presented. Observations of terrestrial X-ray emissions are a very useful method for remote sensing energetic electron precipitation. Auroral x-rays were first discovered in 1961 by Kinsey Anderson [Anderson and Milton, 1964]. Auroral electrons are usually energetic enough to produce X-rays detectable at balloon altitudes in auroral breakup forms.

Wednesday, October 24, 2018 - 3:00pm to 4:00pm  ·  Space Science Seminar
Charles Smith, UNH

Abstract:  We have surveyed the Voyager magnetic field data from launch through 1990 in search of low-frequency waves that are excited by newborn interstellar pickup ions (PUIs). During this time the Voyager 1 and 2 spacecraft reached 43.5 and 33.6 au, respectively. The use of daily spectrograms permits us to perform a thorough search of the data.

Tuesday, October 2, 2018 - 3:00pm to 4:00pm  ·  Space Science Seminar
Dimitry Pokhotelov, IAP, Rostock University

Abstract: The tomographic inversion of GPS electron content data in a three-dimensional time-dependent inversion algorithms combined with Kalman filters can reveal the spatial and temporal distribution of ionospheric electron density. These algorithms have been applied to reconstruct the large-scale 4D dynamics of ionospheric plasma content and density during some major geomagnetic storms.

Monday, September 17, 2018 - 3:00pm to 4:00pm  ·  Space Science Seminar
Fran Bagenal, University of Colorado, Boulder

Abstract: Jupiter is a planet of superlatives: the most massive planet in the solar system, rotates the fastest, has the strongest magnetic field, and has the most massive satellite system of any planet. These unique properties lead to volcanoes on Io and a population of energetic plasma trapped in the magnetic field that provides a physical link between the satellites, particularly Io, and the planet Jupiter.

Thursday, September 13, 2018 - 1:00pm to 2:00pm  ·  Space Science Seminar
George Clark, Ph.D. on behalf of the Juno/JEDI team, Johns Hopkins University Applied Physics Lab; former Undergraduate Student @ UNH

Abstract: Energetic particle observations during Juno’s exploration of both the polar and equatorial magnetosphere of Jupiter has unearthed new and exciting discoveries. These discoveries provide crucial keys to aid in our understanding of auroral acceleration, radiation belt dynamics, heavy ion precipitation, magnetopause boundary structure and much more. Perhaps one of the most intriguing mysteries from Juno/JEDI observations is that Jupiter’s most powerful aurora are driven in a different manner than Earth’s.

Friday, April 6, 2018 - 12:30pm to 1:30pm  ·  Space Science Seminar
Gen Li

Abstract:  Solar energetic particles (SEPs) are high-energy ions and electrons originating at or near the Sun. The energies of these particles extend from solar wind energies up to ~10 GeV for ions and ~100 MeV for electrons.

Wednesday, March 21, 2018 - 3:00pm to 4:00pm  ·  Space Science Seminar
Shunrong Zhang / MIT Haystack Observatory

Abstract: During solar eclipses, the Moon's shadow causes a large reduction in atmospheric energy input, including not only the stratosphere but also the thermosphere and ionosphere. The eclipse shadow has a supersonic motion which is theoretically expected to generate atmospheric bow waves, similar to a fast-moving river boat, with waves starting in the lower atmosphere and propagating into the ionosphere.