I am a Research Fellow at the University of Michigan. I am interested in many topics related active black holes in the universe. I use X-ray spectroscopy and Relativistic Reverberation to study the envirenments just light seconds from the event horizon in supermassive black holes that are tens of millions of light years away.
See more in Research HighlightsSummaries of some of my research articles are presented below
By measuring a the time delay between continuum X-ray radiation and the their reflection just outside the black hole's event horizon, we start to map out the details of the extremely curved space-time, and understand how energy is produced in these extreme environments.
The strength of relativistic effects imprinted in the iron emission line depend on how close the emitting region is to the black hole. By measuring how strong the distortions are, we can measure how fast a black hole is rotating or spin. Fast rotations means strong relativistic distortions to the emitted photons.
The accretion process that feeds black holes produces strong winds that push gas away from the center intro the galaxy at large. The winds can disrupt stars and their formations. By studying absorption of light by the winds, we learn how such a process takes place.
More collaborative work can be found in Abdu Zoghbi list of publications
Observations of MCG-5-23-16 with Suzaku, XMM-Newton and NuSTAR
A maximum likelihood method to calculate Power spectra and time lags from uneverly-sampled light curves.
NuSTAR reveals relativistic reflection but not ultra-fast outflow in the quasar PG 1211+143
Rverberation around the black holes in MCG-5-23-16 and NGC 7314
Relativistic iron K X-ray Reverberation in NGC 4151 with XMM-Newton, the first clear detection.
Exploring the energy-frequency time lag dependence in the active black hole RE J1034+396