Kelci Mohrman research, The Geminga Pulsar Wind Nebula and the Positron Excess, was presented at Michigan Tech’s 2017 Undergraduate Research Symposium this past week. Mohrman looked to identify and model the gamma-ray emission of the Geminga PWN in GeV energies using data from the Fermi Space Telescope in order to determine the potential contribution to the local electron and positron flux.
Geminga (PSR J0633+1746) is a rotating neutron star, called a pulsar, located in the direction of the constellation Gemini. Surrounding the pulsar itself is a pulsar wind nebula (PWN), which accelerates particles to high energies and emits constant gamma radiation. It has been suggested that the particles accelerated by the Geminga PWN could explain the observed excess in the locally measured positron flux, though it was also proposed that this anomalous overabundance of positrons could be a consequence of the annihilation or decay of dark matter.
The Undergraduate Research Symposium highlights the amazing cutting-edge research being conducted on Michigan Tech’s campus by some of our best and brightest undergraduate students.
The students showcasing their work today have spent a significant portion of the past year working alongside Michigan Tech faculty and graduate students to explore, discover and create new knowledge. They’ve spent long hours in the lab or out in the field designing experiments, gathering data, creating new models and testing hypotheses. They’ve applied their classroom knowledge in new and sometimes unexpected ways, and developed new skills that will propel them forward in their careers.
Advisor: Dr. Petra Huentemeyer