Radio Continuum and Far-infrared Emission from the Galaxies in the Eridanus Group

Journal of astrophysics and astronomy

K. S. Dwarakanath1¹  A. Omar1 2¹ 

[1] Raman Research Institute, Sadashivanagar, Bangalore 560 080, India.$$

关键词: Galaxy: radio continuum;    radio;    FIR correlation;    galaxies: groups;    individual: Eridanus.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

The Eridanus galaxies follow the well-known radio–FIR correlation. The majority (70%) of these galaxies have their star formation rates below that of the Milky Way. The galaxies that have a significant excess of radio emission are identified as low luminosity AGNs based on their radio morphologies obtained from the GMRT observations. There are no powerful AGNs (𝐿20cm > 1023W Hz-1) in the group. The two most far-infrared and radio luminous galaxies in the group have optical and HI morphologies suggestive of recent tidal interactions. The Eridanus group also has two far-infrared luminous but radio-deficient galaxies. It is believed that these galaxies are observed within a few Myr of the onset of an intense star formation episode after being quiescent for at least a 100 Myr. The upper end of the radio luminosity distribution of the Eridanus galaxies (𝐿20cm ∼ 1022W Hz-1) is consistent with that of the field galaxies, other groups, and late-type galaxies in nearby clusters.

【 授权许可】

Unknown