Astronomy and Astrophysics Seminars
Gravitational Lensing by Compact Objects in the Galactic Center:Can we exclude or detect a boson star?
by Dr. Amitai Bin-Nun (University of Pennsylvania)
Thursday, March 17, 2011
from
to
(Asia/Kolkata)
at Colaba Campus ( AG-66 )
at Colaba Campus ( AG-66 )
Description |
Over the last few decades, it has been increasingly clear that there is an extremely compact object at Sgr A* in the center of the galaxy. Some have looked at the theoretical gravitational lensing properties of this object, particularly on stars orbiting the galactic center. In this talk, I explore the possibility that a "boson star" or compact collection of scalar particles, is responsible for the large mass at Sgr A*. This possibility cannot be ruled out by observation of dynamical processes because of the compactness of a boson star. However, I argue that the gravitational lensing properties of a boson star have unique properties and their presence or absence would be strong evidence for or against a boson star in the galactic center. |
Organised by | Dr. A. Gopakumar |