1303.6329 (Jasmeer Virdee et al.)

Herschel-ATLAS/GAMA: What determines the far-infrared properties of radio-galaxies?    [PDF]

Jasmeer Virdee, Martin Hardcastle, Steven Rawlings, Dimitra Rigopoulou, Tom Mauch, Matt Jarvis, Aprajita Verma, Daniel Smith, Ian Heywood, Sarah White, Martin Baes, Asantha Cooray, Gianfranco De Zotti, Steve Eales, Michal Michalowski, Nathan Bourne, Ali Dariush, Loretta Dunne, Rosalind Hopwood, Eduardo Ibar, Steve Maddox, Matthew Smith, Elisabetta Valiante

We perform a stacking analysis of H-ATLAS data in order to obtain isothermal dust temperatures and rest-frame luminosities at 250um (L250), for 1599 radio sources over the H-ATLAS P1 GAMA area. The radio sample is generated using a combination of NVSS data and K-band UKIDSS-LAS data, over 0.011.5 L_{K}^{*}) may have systematically lower FIR luminosities (~25%) than their colour-matched non radio-detected counterparts. Compact radio sources (<30kpc) are associated with higher L250s and dust temperatures than their more extended (>30kpc) counterparts. The higher dust temperature suggests that this may be attributed to enhanced SFRs, but whether this is directly or indirectly due to radio activity (e.g. jet induced or merger-driven SF) is as yet unknown.

View original: http://arxiv.org/abs/1303.6329