Radio continuum studies of Luminous Infrared Galaxies (LIRGs)

 

Radio-GOALS is a project co-funded by the ESP and the Greek state in support of postdoctoral research in Greece, and in collaboration with the Great Observatories All-sky LIRG Survey (GOALSArmus et al. 2009) team at the Infrared Processing and Analysis Center (IPAC), part of the California Institute of Technology (Caltech). A more detailed description of the project and the GOALS sample can be found here.

 

The target of Radio-GOALS is to study the radio continuum properties of 202 Ultra-Luminous and Luminous Infrared Galaxy systems (U-LIRGs) in the local Universe (z

 

We use the radio continuum maps at 1.49 and at 8.44 GHz from Condon et al. (1990; 1991) to produce radio-spectral-index-maps (a-maps) and study the variations in the radio spectral index spatially, in order to identify the presence of an Active Galactic Nucleus (AGN) in the centre of these (U)LIRGs. We furthermore compare the method of finding AGN using radio continuum observations to mid-IR and optical AGN diagnostics. Finally, we give an estimate for the size of the compact starburst in the radio.

  • Estimating the equipartition and minimum magnetic field strengths of low-redshift (U)LIRGs.

We use the radio spectral index a maps from Vardoulaki et al. 2014 and the 1.49 GHz VLA maps available to calculate the Beq and Bmin maps for the objects in our sample using the study of Beck & Krause (2005). 

  • Studying the spatial variation in the radio and comparing to the underlying emission in the mid- and far-IR (in preparation).

We use the archival VLA maps to study the variations in the radio emission spatially and we compare to the emission in the mid-IR. We extend the study to the far-IR.

 
 

The research project is implemented within the framework of the Action ''Supporting Postdoctoral Researchers'' of the Operational Program ''Education and Lifelong Learning'' (Action's Beneficiary: General Secretariat for Research and Technology), and is co-financed by the European Social Fund (ESF) and the Greek State.

 

Contact Details

eleniv@physics.uoc.gr

https://www.facebook.com/eleni.vardoulaki

follow @EleniVardoulaki

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