AGN Variability and HEAN in the age of VRO


Creque-Sarbinowski, C. (2021). AGN Variability and HEAN in the age of VRO. Perimeter Institute. https://pirsa.org/21120019


Creque-Sarbinowski, Cyril. AGN Variability and HEAN in the age of VRO. Perimeter Institute, Dec. 10, 2021, https://pirsa.org/21120019


          @misc{ pirsa_21120019,
            doi = {10.48660/21120019},
            url = {https://pirsa.org/21120019},
            author = {Creque-Sarbinowski, Cyril},
            keywords = {Cosmology},
            language = {en},
            title = {AGN Variability and HEAN in the age of VRO},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {dec},
            note = {PIRSA:21120019 see, \url{https://pirsa.org}}

Cyril Creque-Sarbinowski Johns Hopkins University


Over the next ten years, the Vera C. Rubin Observatory (VRO) will observe ∼10 million active galactic nuclei (AGN) with a regular and high cadence. During this time, the intensities of most of these AGN will vary stochastically. Moreover, these fluctuations may also be connected to the high-energy astrophysical neutrino (HEAN) flux observed by IceCube. In this talk, I explore the prospects to quantify these fluctuations with VRO-measurements of AGN light curves and also evaluate the capacity of VRO, in tandem with various current and upcoming neutrino telescopes, to establish AGN as HEAN emitters.  I find that AGN variability measurements will be so precise as to allow the AGN to be separated into up to ∼ 10 different correlation-timescale bins. I also show that if the correlation time varies as some power of the luminosity, the normalization and power-law index of that relation will be determined to O(10^{−4}%).  Finally, I find that it may be possible to detect AGN contributions at the ~ 3\sigma level to the HEAN flux even if these AGN contribute only ~10% of the HEAN flux.