Speaker
Description
In the last decade, the discovery of extended regions of TeV emission around several middle-aged pulsars, called TeV Halos, has spawned many studies of the characteristics and prevalence of this new source class. Both the HAWC and LHAASO observatories have included potential TeV Halo candidate pulsars in their catalogs of TeV sources for many years. Several individual analyses of potential Halos using diffusion-motivated models have explored sources in detail like Geminga, Monogem, and J0621+3755. The study of these sources indicates several potential source class wide characteristics but is limited due to the small number of them compared to the potential population. Using 3,039 days of HAWC data and the sources from the 4HWC catalog, we present a modeling of 23 potential TeV Halos using a diffusion-motivated spatial model. The diffusion-motivated spatial model provides the estimated diffusion coefficient, electron energy density, and physical extent of each of these 23 TeV sources. Using these physical parameters, we are better able to estimate the likelihood of these sources possessing an extended halo of electrons and positrons while also evaluating the common characteristics of TeV Halos using a much larger sample. This more comprehensive study of potential TeV Halos provides theorists a much broader selection of data-driven models to explore theories of cosmic-ray particle transport, positron excess, and pulsar wind nebula evolution.