| Tuesday, February 5, 2019 |
| Modjaz Group Mtg | |
| Event Type: Modjaz Group Mtg | |
| Time: 11:00 AM - 12:30 PM | |
| Location: 726 Broadway, 901, Sm Conf | |
| The blazar TXS 0506+056: A source of high-energy neutrinos? | |
| Foteini Oikonomou, ESO | |
| Event Type: Informal Astro Talk | |
| Time: 11:00 AM - 11:30 AM | |
| Location: 940 if 902 is not availab | |
| Abstract: The IceCube Collaboration recently announced the detection of a high-energy astrophysical neutrino from the direction of the blazar TXS 0506+056 during an energetic gamma-ray flare, and an archival “neutrino flare” from the same direction. In this talk, I will present observational evidence that TXS 0506+056 is not, as it seems, a BL Lac object. It is, instead, a powerful quasar with an accretion disk surrounded by strong radiation fields. This has implications for neutrino production in the environment of the source, which will be discussed. | |
| Nonlinear cosmology with massive neutrinos | |
| Jia Liu, Princeton University | |
| Event Type: Astro Seminar | |
| Time: 2:00 PM - 3:15 PM | |
| Location: 726 Broadway, 940, CCPP Seminar | |
| Abstract: The non-zero mass of neutrinos suppresses the growth of cosmic structure on small scales. Since the level of suppression depends on the masses of the three active neutrino species, the evolution of large-scale structure is a promising tool to constrain the total mass of neutrinos and possibly shed light on the mass hierarchy. I will discuss recent progress and future prospects to constrain the neutrino mass sum with cosmology, with a focus on the nonlinear regime. | |