FNWI --- IMAPP Department of Astrophysics
Radboud University > Faculty of Science > Department of Astrophysics

Payaswini Saikia


PhD student


Department of Astrophysics
Faculty of Science
Radboud University Nijmegen

Visiting address:
Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands

Postal address:
P.O. Box 9010, 6500 GL Nijmegen, The Netherlands

Location: Huygens building
Room: 03.724
Telephone: +31 (0) 24 36 52821
Telefax: +31 (0) 24 36 52807

E-mail: p.saikia (at
Personal Website:

Research area

I am currently working on the Fundamental Plane of Black Hole activity with Elmar Koerding and Heino Falcke. We have discovered the fundamental plane in optical band using a complete sample of 39 supermassive black holes (SMBH) selected from the Palomar Spectroscopic Survey, and a sample of the best studied stellar mass X-ray binaries in the low/hard state (Saikia P. et al, 2015, MNRAS, 450, 2317). We have also proposed a new and independent method of constructing the blazar Lorentz factor distribution, using the optical fundamental plane found (Saikia P. et al., 2016, MNRAS, 461, 2397). Right now, we are working on ​the possibilities of ​ using 1.4 GHz FIRST radio ​fluxes to trace nuclear jet activities (Saikia P. et al., 2017, in prep).


The Fundamental Plane of black hole activity in the optical band
Payaswini Saikia; Elmar Kording; Heino Falcke, MNRAS 2015 450 (3): 2317-2326

Lorentz factor distribution of blazars from the optical Fundamental Plane of black hole activity
Payaswini Saikia; Elmar Kording; Heino Falcke, MNRAS 2016 461 (1) : 297-303