Abstract Details
| Name: Konstantinos Kolokythas Affiliation: IUCAA Conference ID: ASI2017_1391 Title : The Complete Local-Volume Groups Sample: Radio properties and feedback implications of galaxy groups in the Local Universe Authors and Co-Authors : Dr. Ewan O' Sullivan Harvard-Smithsonian CfA, Prof. Somak Raychaudhury, IUCAA Abstract Type : Oral Abstract Category : Extragalactic astronomy Abstract : Much of the evolution of galaxies takes place in groups where feedback has the greatest impact on galaxy formation. By using an optically selected, statistically complete sample of 53 nearby groups (CLoGS), observed at both radio (GMRT) and X-ray (Chandra and XMM-Newton) frequencies, my work aims to characterize the radio-AGN population in groups and examine their impact on the intra-group gas and member galaxies. In this regard, first results from low-frequency GMRT radio images of the nearby (<80 Mpc) central brightest group elliptical from the high richness CLoGS sub-sample are presented at 235 and 610 MHz. Using the sensitivity to older electron populations at 235 MHz and the resolution of 610 MHz as a key to identify past and current AGN activity, I will discuss the properties that central group radio sources present in our sample (radio morphology, spectral index, energetics etc), along with information on the group environment that they lie into, in combination with the radio results with findings from the X-ray observations. |