HerMES: SPIRE emission from radio-selected active galactic nuclei
| Titre | HerMES: SPIRE emission from radio-selected active galactic nuclei |
| Type de publication | Journal Article |
| Year of Publication | 2011 |
| Auteurs | Seymour, N, Symeonidis, M, Page, MJ, Amblard, A, Arumugam, V, Aussel, H, Blain, A, Bock, J, Boselli, A, Buat, V, Castro-Rodriguez, N, Cava, A, Chanial, P, Clements, DL, Conley, A, Conversi, L, Cooray, A, Dowell, CD, Dwek, E, Eales, S, Elbaz, D, Franceschini, A, Glenn, J, Solares, EAG, Griffin, M, Hatziminaoglou, E, Ibar, E, Isaak, K, Ivison, RJ, Lagache, G, Levenson, L, Lu, N, Madden, S, Maffei, B, Mainetti, G, Marchetti, L, Nguyen, HT, O'Halloran, B, Oliver, SJ, Omont, A, Panuzzo, P, Papageorgiou, A, Pearson, CP, Perez-Fournon, I, Pohlen, M, Rawlings, JI, Rizzo, D, Roseboom, IG, Rowan-Robinson, M, Schulz, B, Scott, D, Shupe, DL, Smith, AJ, Stevens, JA, Trichas, M, Tugwell, KE, Vaccari, M, Valtchanov, I, Vigroux, L, Wang, L, Wright, G, Xu, CK, Zemcov, M |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 413 |
| Pagination | 1777-1786 |
| Date Published | May |
| ISBN Number | 0035-8711 |
| Numéro d'accès | WOS:000290487700024 |
| Résumé | We examine the rest-frame far-infrared emission from powerful radio sources with 1.4-GHz luminosity densities of 25 < log(L-1.4/W Hz-1) < 26.5 in the extragalactic Spitzer First Look Survey field. We combine Herschel/SPIRE flux densities with Spitzer/Infrared Array Camera and Multiband Imaging Photometer for Spitzer infrared data to obtain total (m) infrared luminosities for these radio sources. We separate our sources into a moderate, 0.4 < z < 0.9, and a high, 1.2 < z < 3.0, redshift sub-sample and we use Spitzer observations of a z < 0.1 3CRR sample as a local comparison. By comparison to numbers from the Square Kilometre Array (SKA) Simulated Skies, we find that our moderate-redshift sample is complete and our high-redshift sample is 14 per cent complete. We constrain the ranges of mean star formation rates (SFRs) to be 3.4-4.2, 18-41 and 80-581 M-circle dot yr-1 for the local, moderate- and high-redshift samples, respectively. Hence, we observe an increase in the mean SFR with increasing redshift which we can parametrize as similar to(1 + z)Q, where Q = 4.2 +/- 0.8. However, we observe no trends of mean SFR with radio luminosity within the moderate- or high-redshift bins. We estimate that radio-loud active galactic nuclei (AGN) in the high-redshift sample contribute 0.1-0.5 per cent to the total SFR density at that epoch. Hence, if all luminous starbursts host radio-loud AGN we infer a radio-loud phase duty cycle of 0.001-0.005. |
