| Understanding the high-energy emission processes in blazars: the most consistently bright objects in the Universe. |
| Yannis Liodakis, Kavli Institute for Particle Astrophysics and Cosmo |
| Event Type: Astro Seminar |
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| Time: 2:00 PM - 3:30 PM |
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| Location: 726 Broadway, 940, CCPP Seminar |
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| Abstract: Even with several thousand Fermi-LAT blazar detections, the high-energy jet emission mechanisms are poorly understood. Although popular models point towards leptonic processes, the recent possible neutrino association with a γ-ray flare challenges our understanding of these processes implicating a hadronic contribution to the high energy emission of blazar jets. I will discuss our recent efforts to address the distinction between emission models by exploring the temporal relation and correlated flux variations between optical and γ-rays for the largest sample of γ-ray blazars analyzed to this date, as well as the first attempt to quantify the fraction of orphan γ-ray flares in the Fermi light curves. I will also discuss what the future brings in understanding the high-energy emission processes in jets with the first ever X-ray polarization mission, the Imaging X-ray Polarimetry Explorer (IXPE). |