Astrophysical Origins of Quasar Variability at Radio Frequencies
Abstract
At radio frequencies, precise measurements of the fluxes and positions of thousands of quasars form the basis of the celestial reference frame (CRF). The CRF is an important navigational asset to the Navy. However, changes in quasar fluxes or positions over human timescales ranging from minutes to years pose a persistent challenge to the accuracy and reliability of the CRF. Despite the importance of quasars, our understanding of the physical drivers of quasar variability remains incomplete. My research focuses on investigating the link between quasar variability at radio frequencies and the properties of the quasar, host galaxy, and ambient environment. In this report, I will discuss the astrophysical implications of my research for our understanding of quasar jet life cycles and galaxy evolution, as well as how this work supports Navy interests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 28, 2023
- Accession Number
- AD1218639
Entities
People
- Kristina Nyland
Organizations
- United States Naval Research Laboratory