e-MERLIN and VLBI observations of the luminous infrared galaxy IC 883: a nuclear starburst and an AGN candidate revealed

The authors study of the luminous infrared galaxies (LIRG) IC883 aims at: 1. investigating the parsec-scale radio structure of the circum-nuclear regions of IC883; 2. detecting at radio frequencies the two recently reported circumnuclear SNe 2010cu and 2011hi; and 3. further investigating the nature...

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Published in:Astronomy and astrophysics (Berlin) 2012-07, Vol.543, p.1-1
Main Authors: Romero-Canizales, C, Perez-Torres, M A, Alberdi, A, Argo, M K, Beswick, R J, Kankare, E, Batejat, F, Efstathiou, A, Mattila, S, Conway, J E, Garrington, S T, Muxlow, T W B, Ryder, S D, Vaeisaenen, P
Format: Article
Language:English
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Summary:The authors study of the luminous infrared galaxies (LIRG) IC883 aims at: 1. investigating the parsec-scale radio structure of the circum-nuclear regions of IC883; 2. detecting at radio frequencies the two recently reported circumnuclear SNe 2010cu and 2011hi; and 3. further investigating the nature of SN2011hi at NIR wavelengths. They used the electronic European very long baseline interferometry (VLBI) Network (e-EVN) at 5GHz, and the electronic Multi-Element Remotely Linked Interferometer Network (e-MERLIN) at 6.9 GHz, to observe contemporaneously the LIRG IC883 at high angular-resolution and with high sensitivity, complemented by archival VLBI data at 5 GHz and 8.4 GHz. The circumnuclear regions traced by e-MERLIN at 6.9 GHz have an extension of similar to 1 kpc, at a position angle of 130 degrees, and show a striking double sided structure, in agreement with previous studies. Their e-EVN observations at 5 GHz and complementary archival VLBI data at 5 GHz and 8.4 GHz, reveal various milliarcsec compact components in the nucleus of IC883.
ISSN:0004-6361
1432-0746