Speaker
Ms
Ashlynn Le Ray
(University of the Witwaterstrand)
Description
The star formation history (SFH) of the Universe is of fundamental importance to cosmology, not only to galaxy formation itself, but also for ongoing efforts to determine cosmological parameters and matter content of the universe. Measurement of the extragalactic background light (EBL) as a function of redshift can constrain models of the SFH, including the initial mass function(IMF) and dust extinction. The gamma-ray spectra of AGN allow us to study the extragalactic background light (EBL) through absorption of high-energy photons. In this work, we present constraints on models of SFH using a sample of AGN observed by the Fermi-LAT instrument by investigating the imprint of the EBL on the observed spectra of high-redshift Fermi-LAT AGN above ~ 10 GeV.
Supervisor details<br><b>If not a student, type N/A.</b><br>Student abstract submision<br>requires supervisor permission:<br>please give their name,<br> institution and email address.
Prof. Andrew Chen
andrew.chen@wits.ac.za
| Consideration for<br>student awards<br><b>Choose one option<br>from those below.</b><br>N/A<br>Hons<br>MSc<br>PhD | MSc |
|---|---|
| Please confirm that you<br>have carefully read the<br>abstract submission instructions<br>under the menu item<br>"Call for Abstracts"<br><b>(Yes / No)</b> | Yes |
Primary author
Ms
Ashlynn Le Ray
(University of the Witwaterstrand)
Co-author
Prof.
Andrew Chen
(University of the Witwaterstrand)
