Name:	Dabhade, Pratik
Email:	pratikdabhade13@gmail.com
Institution:	University of Pune
Title:	Infrared properties of giant radio galaxies & radio quasars
Topic:	Discoveries
Abstract:	Giant radio galaxies(GRGs) are rare class of radio galaxies which extend up to megaparsec scale in size, which is comparable to the size of galaxy clusters. GRGs are the single largest structure in the Universe and so far about 200 GRGs are known. The reason for enormous sizes of these galaxies is still an open question in astrophysics. GRGs due to their large sizes may have an influence on the IGM and thus can be one of the factors for the galaxy cluster evolution and hence play an important role in the process of large-scale structure formation in the Universe We present our findings on the infrared properties of the GRGs. We show for first time the classification of GRGs into Quasars, Low excitation radio galaxies, High excitation radio galaxies etc using the WISE mid-IR magnitudes. This provides us the information about GRGs accretion rate and modes which will help us understand the growth and co-evolution of these massive objects. We also propose an alternative method for identifying radio loud quasars in absence of a optical spectrum using the WISE mid-IR magnitudes.