Institute for Advanced Study/Princeton University Joint Astrophysics Colloquium

Imaging All the Sky All the Time in Search of Radio Exoplanets

All the magnetized planets in our solar system, including Earth, produce bright emission at low radio frequencies, predominantly originating in high magnetic latitudes and powered by magnetospheric currents. It has long been speculated that similar radio emission may be detectable from exoplanets orbiting nearby stars, potentially providing the first direct confirmation of the presence, strength and topology of exoplanet magnetospheres, and informing on their role in shielding the atmospheres of potentially habitable exoplanets. Despite 4 decades of searching, no exoplanet radio emission has been detected. Surprisingly, however, brown dwarfs have been found to produce both radio and optical emissions that are strikingly similar to the auroral emissions from solar system planets, albeit 100,000 times more luminous. I will discuss the radio emission from exoplanets and brown dwarfs with particular focus on the OVRO-LWA, a low frequency radio astronomy array located in the Owens Valley, California, that images the entire sky every 10 seconds to simultaneously monitor 4000 nearby stellar systems in the search for radio emission from exoplanets.

Date & Time

October 09, 2018 | 11:00am – 12:00pm

Location

Bloomberg Hall Lecture Hall

Speakers

Gregg Hallinan

Affiliation

California Institute of Technology

Notes

Coffee and refreshments are available from 10:30 am in the Bloomberg Hall Commons Room. Lunch will be provided for all and available in the back of the Dilworth Room. Please enter the Dilworth Room using the last door in the hallway.