Astronomy and Astrophysics Seminars
The No-hair theorem of black holes and the binary black hole system OJ287
by Prof. Mauri Valtonen (University of Turku, Finland)
Thursday, January 21, 2010
from
to
(Asia/Kolkata)
at Colaba Campus ( AG-66 )
at Colaba Campus ( AG-66 )
Description |
OJ287 is a quasar which has shown outbursts every 12 yr for the past one hundred years. This behaviour was discovered in 1982, In 1995 a binary black hole model was developed which predicted the future optical light curve. OJ287 has now followed this light curve very closely for 15 years, thus confirming the main features of the model. In the last couple of years the model has also been used to test the predictions of General Relativity in the Post Newtonian approximation. The current state of these tests are described,and future tests are proposed. In particular, the first test of the no-hair theorem of black holes has now been confirmed, Its accuracy could be improved in 2019 to about 20% level. |
Organised by | Prof. J.S. Yadav |