已收录 272893 条政策
 政策提纲
  • 暂无提纲
Radio properties of a complete sample of nearby groups of galaxies
[摘要] 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 radio (GMRT) and X-ray (Chandra and XMM-Newton) frequencies, we aim to characterise the radio-AGN population in groups and examine their impact on the intra-group gas and member galaxies. In this dissertation, low-frequency GMRT radio images of the nearby (<80 Mpc) central brightest group ellipticals from the high richness CLoGS sub-sample are presented for the first time 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, a detailed analysis of the radio properties for each of the central group radio sources is performed, with the results being in addition combined with findings from the X-ray observations.
[发布日期]  [发布机构] University:University of Birmingham;Department:School of Physics and Astronomy
[效力级别]  [学科分类] 
[关键词] Q Science;QB Astronomy [时效性] 
   浏览次数:21      统一登录查看全文      激活码登录查看全文