Abstract Details

Name: Smriti Mahajan
Affiliation: Indian Institute of Science Education and Research, Mohali, Knowledge city, Sector 81, Punjab 140306
Conference ID: ASI2021_259
Title : An insight into multi-wavelength star formation rates
Authors and Co-Authors : Smriti Mahajan (IISER Mohali, India), M.L.N. Ashby (CfA, USA), S.P. Willner (CfA, USA), P. Barmby (Univ of Western Ontario, Canada), G.G. Fazio (CfA, USA), A. Maragkoudakis (Univ of Western Ontario, Canada; Univ of Crete & Foundation for Research and Technology, Greece), S. Raychaudhury (IUCAA, India), A. Zezas (Univ of Crete & Foundation for Research and Technology, Greece)
Abstract Type : Invited
Abstract Category : Extragalactic Astronomy
Abstract : Star formation is critical for galaxy evolution. Stars have created almost all the elements heavier than Helium in the universe and play a key role in recycling dust and metals in galaxies. Hence the rate at which a galaxy forms stars is one of the most important drivers of its evolution. Recently, many authors have employed multi-wavelength data in a variety of wavebands to study the relationship between star formation rates (SFR) estimated using luminosity in a single waveband. In this talk, I will provide a brief overview of our current understanding of the relationship between SFR tracers ranging from radio to ultraviolet (UV) wavelengths. In the nearby (z ~ 0.1) universe, many studies yield mutually consistent estimates of SFR within statistical uncertainties for most galaxy samples. For a far infrared-selected sample of galaxies, the scatter is found to be even smaller for the intermediate luminosity galaxies, than the scatter in the complete sample. Moreover, in agreement with other studies, these data also prefer a non-linear relation between the 1.4GHz luminosity and other SFR measures. Along with the recent results on SFR metrics using multi-wavelength data, I will also discuss the role of extinction corrections based on bolometric luminosity, UV spectral slope and the nuclear Balmer decrement in estimating the total SFR for different galaxy populations.