PIRSA:21120019

# AGN Variability and HEAN in the age of VRO

### APA

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

### MLA

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

### BibTex

          @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

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Talk Type
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## Abstract

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.