Northwestern Events Calendar


HEP Seminar: James Unwin: A Black Hole at the Edge of our Solar System?

When: Monday, March 9, 2020
4:00 PM - 5:00 PM Central

Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it

Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students

Contact: Yas Shemirani   (847) 491-3644

Group: Physics and Astronomy High Energy Physics Seminars

Category: Academic


While the structure of the Solar System out to about 100 AU is well
explained, beyond this there are trans-Newtonian objects (TNOs) whose
orbits cannot be readily understood. These anomalous orbits have been
taken as evidence of a possible ninth planet in our Solar System with
mass 5-10 times that of Earth, orbiting at a distance of around 500 AU
from the Sun. In this talk I will first briefly outline the case for
Planet 9. Subsequently, I will highlight that, since this is an odd
place to find a large planet, it is plausible that it could possibly
be a more exotic object than a planet. The prime example I will
consider is a five Earth mass primordial black hole, and I will
further highlight that there is tentative evidence for such objects in
recent microlensing observations. Furthermore, I will discuss how such
a black hole might be captured by the Solar System and how this
scenario could be confirmed through annihilation signals from the dark
matter microhalo which forms around the primordial black hole.


Seminar Speaker: James Unwin, UIC


Keywords: Physics, Astronomy, HEP

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