Professor of Physics and Astronomy
Stony Brook University
CV : cv.pdf
PUBLICATIONS (ADS link): Full List
HIGH ENERGY- research topics include:
Gamma-ray Bursts, and in
particular the effects that the X-ray/UV radiation accompanying them
produce on their surrounding gas. This has led to the
development of a radiative transfer code that can
self-consistently track gas photoionization and dust
destruction by the burst radiation.
Other interests concern the physics of accretion disks accreting at very high rates and cooling through neutrino emission. These are believed to provide the ultimate source of power for GRBs.
Since the launch of the Swift satellite, I have also been working towards understanding the origin of puzzling and unexpected phenomena, such as the presence of X-ray flares in the early afterglow lightcurves.
Within the context of short GRBs, my research has focused on making a connection between the theoretical predictions for the mergers of two compact objects (neutron star-neutron star and neutron star-black hole), and the observable properties of the resulting GRBs.
Neutron Stars, with particular emphasis on Anomalous X-ray Pulsars and Soft Gamma-Ray Repeaters, a subclass of neutron stars thought to be endowed with very large magnetic fields (and also dubbed "magnetars"). Other interests involve isolated, old neutron stars accreting from the interstellar medium, the connection between pulsars and HI supershells, the spin periods of neutron stars at birth, and the timing behaviour of accreting X-ray Binaries.
COSMOLOGY - research topics include:
Gravitational Lensing and Microlensing, the latter with focus on microlensing by stars in binaries.
Interstellar Medium (ISM), and in particular the use of Gamma-Ray Bursts as probes of the ISM in high-redshift galaxies.
Foregrounds for measurements of the Cosmic Microwave Background and for 21-cm experiments. Particular focus has been on the contaminating signal from the radio-emitting centers of nearby, early-type galaxies.
holes, and especially the feedback that they have on the
intergalactic medium while growing.
EXOPLANETS - research topics include:
Magnetohydrodynamic interactions in the atmospheres of hot Jupiters.
PHYS 251: MODERN PHYSICS (Recitation) Fall 2017
PHYS 522: THE INTERSTELLAR MEDIUM Fall 2016
AST 101: INTRODUCTION TO ASTRONOMY: STARS AND GALAXIES Spring 2015, Fall 2015
AST 112: ASTRONOMY LABORATORY Spring 2015, Fall 2015
AST 341: STARS AND RADIATION Fall 2014, Fall 2016
PHY599: Graduate Seminar II (Nuclear, Particle, Astronomy) Spring 2014, Fall 2014, Fall 2017
ASTR 5120: RADIATIVE AND DYNAMICAL PROCESSES Spring 2010, Spring 2011, Fall 2013
ASTR 6000: NEUTRON STARS Fall 2009
ASTR 2030-001: BLACK HOLES Fall 2004, Fall 2005, Fall 2007, Fall 2008 (double), Fall 2010, Fall 2012
ASTR 1120-002: STARS AND GALAXIES Spring 2008, Fall 2009
ASTR 5120-001: INTERNAL PROCESSES IN GASES - II Spring 2006, Spring 2007
Nathan Leigh (01/2018 – 12/2018)
Simone Dall'Osso (05/2016 – 02/2018)
Takamitsu Tanaka (09/2014 – 08/2016)
(10/2011 - 09/2013)
Matthew Van Adelsberg (09/2006 - 08/2008)
These are students who have been recently (or currently are) involved in research projects with me.