The Radio Galaxy Environment Reference Survey

Understanding the evolution of structure formation in the young Universe remains one of the outstanding challenges for modern astronomy. By observing the Universe at longer FIR-to-cm wavelengths we can obtain a unique perspective on the growth of massive galaxies at high-redshift. Powerful radio galaxies have long been known to act as the sign posts for over-dense regions when the Universe was less than half of its present age. This has led to the assumption that these may signify early proto-clusters of galaxies. Similarly, submm-wavelength continuum observations trace the formation of obscured galaxy formation out to the early Universe, and so targeted submm-wavelength surveys of radio galaxy fields can assess the degree to which dusty starburst galaxies may be associated with proto-cluster regions. To this end, we have conducted The RAdio Galaxy Environment Reference Survey (RAGERS) using the East Asian Observatory on Mauna Kea. I will present maps and preliminary results on the submm sources, their number counts and the associated Very Large Array radio observations of the fields of more than 20 high-redshift radio galaxies. We address the question of whether the FIR and radio-selected galaxies may be more abundant around power radio galaxies relative to what is observed in the field.

Jeff Wagg (PIFI Visiting Scientist at PMO)
Join Zoom Meeting Meeting ID: 837 5439 8263 Passcode: 692403
Ran Wang
Thursday, November 3, 2022 - 3:30PM to Thursday, November 3, 2022 - 4:30PM
▪ Project Scientist responsible for community engagement and design of world’s largest radio telescope (Square Kilometre Array) ▪ Data analyst and telescope commissioning team lead during construction of billion dollar telescope in Chile (Atacama Large Millimeter/Submillimeter Array) ▪ Research scientist studying the formation of galaxies (over 110 published articles)