Poster presentation

Space Science Seminar

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.

Thursday, March 1, 2018 - 3:00pm to 4:00pm  ·  Space Science Seminar
Dr. Kris Klein, University of Michigan

Abstract:  Instabilities help regulate the dynamic behavior of many collisionless plasma systems, including those of interest to the plasma, space, solar, and astrophysics communities. Typical stability studies focus on the parametric behavior of specific unstable modes or a single free-energy source. In this work, we employ for the first time on a random statistical set of solar wind observations a method that determines stability allowing for all sources of free energy, known as Nyquist's instability criterion.

Tuesday, February 6, 2018 - 2:30pm to 3:30pm  ·  Space Science Seminar
Dr. Regina Caputo

Abstract: The recent joint detection of gravitational waves from a binary neutron star merger and an associated short gamma-ray burst (GRB) has given rise to a new branch of multi-messenger astrophysics. Upgrades to the current LIGO/Virgo facilities, and the eventual addition of more gravitational wave observatories, will expand the detection horizon. New gamma-ray instruments are needed in both the near-term to complement current instruments, and in the long-term to insure that future joint detections will be possible. One instrument, BurstCube, is set to launch in 2021.

Thursday, February 1, 2018 - 1:30pm to 2:30pm  ·  Space Science Seminar
Dr. Joshua Schlieder (NASA / Goddard Space Flight Center)

Abstract: NASA's Kepler mission revolutionized our understanding of the frequency and diversity of exoplanets. Despite observing relatively few low-mass M dwarf stars, a key result from Kepler was that M dwarfs frequently host small Earth-like planets. With the failure of two reaction wheels, the Kepler mission ended and was reborn as K2, an ecliptic plane survey with ~80 day observing campaigns. I will recount the story of planets orbiting low-mass stars from Kepler, describe the transition to K2, and highlight key discoveries made in its first 3 years.

Tuesday, January 30, 2018 - 2:30pm to 3:30pm  ·  Space Science Seminar
Dr. Nahee Park, Wisconsin IceCube Particle Astrophysics Center

Abstract: Cosmic rays, high energy particles originating from outside of the solar system, are believed to be dominated by particles from our Galaxy at least up to the energy of 10^15 eV. Recent precise measurements of leptons and light nuclei below 1 TeV/nucleon by the satellite experiments PAMELA and AMS-02 are challenging the classical paradigm of Galactic cosmic-ray astrophysics. It is essential to understand the propagation of these particles to study the origins of discrepancies with the classical models.