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Shaon Ghosh

Assistant Professor, Physics and Astronomy

Richardson Hall 269C
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I am an astrophysicist working on gravitational wave data analysis. Gravitational waves (GW) are ripples in the fabric of space-time produced by dynamics of massive objects. We are able to detect GW from violent collisions of neutron stars and black holes using a multiple ground-based GW detectors called LIGO - Laser Interferometer Gravitational-wave Observatory. GW carries with them information about these colliding systems that have previously been inaccessible to us. We can measure the masses and spins of these systems directly, and the distance to these sources in a “cosmological-ladder” independent way. Using a network such detectors (one in Hanford WA, one in Livingston LA, one in Cascina, Italy, an upcoming one in Japan, and a planned in India) we are able to triangulate these sources in the sky. These triangulated regions are then followed-up by electromagnetic observatories (optical and infrared telescopes, radio telescopes and space-based high-energy telescopes). This synergy of GW and electromagnetic data will give us knowledge of these extreme phenomenon in a scale that was never possible before. Gravitational waves from systems with neutron stars are also messengers of how much the neutron stars were deformed due to tidal forces in the last moments before the coalescence. This information is crucial to our understanding of the matter at extreme densities, which can not be replicated in our laboratories.
I work at the junction of these two fields of gravitational wave and electromagnetic observations. I study GW data obtained from LIGO, and analyze them to extract physics of the system. I collaborate with telescopes around the world to follow-up these systems to search for signatures of these events in the electromagnetic spectrum. I devise tools to combine the information from the GW and electromagnetic channels to maximize the scientific output of our observations.


Astrophysics, Gravitational wave astronomy, Data analysis.


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