Details

Autor(en) / Beteiligte

• Vardoulaki, E
• Charmandaris, V
• Murphy, E J
• Diaz-Santos, T
• Armus, L
• Evans, A S
• Mazzarella, J M
• Privon, G C
• Stierwalt, S
• Barcos-Munoz, L

Titel

Radio continuum properties of luminous infrared galaxies: Identifying the presence of an AGN in the radio

Ist Teil von

• Astronomy and astrophysics (Berlin), 2015-02, Vol.574, p.A4

Ort / Verlag

EDP Sciences

Erscheinungsjahr

2015

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Luminous infrared galaxies (LIRGs) are systems enshrouded in dust, which absorbs most of their optical/UV emission and radiates it again in the mid- and far-infrared. Radio observations are largely unaffected by dust obscuration, enabling us to study the central regions of LIRGs in an unbiased manner. The main goal of this project is to examine how the radio properties of local LIRGs relate to their infrared spectral characteristics. Here we present an analysis of the radio continuum properties of a subset of the Great Observatories All-sky LIRG Survey (GOALS), which consists of 202 nearby systems. Our radio sample consists of 35 systems, containing 46 individual galaxies, that were observed at both 1.49 and 8.44 GHz with the VLA with a resolution of about 1 arcsec (FWHM). The aim of the project is to use the radio imagery to probe the central kpc of these LIRGs in search of active galactic nuclei (AGN). We find that 21 out of the 46 objects in our sample are radio-AGN, 9 out of the 46 are classified as star-bursts (SB) based on the radio analysis, and 16 are AGN/SB.