Radio imaging of the Subaru/XMM-Newton Deep Field -I. The 100-μJy catalogue, optical identifications, and the nature of the faint radio source population

We describe deep radio imaging at 1.4 GHz of the 1.3-deg2 Subaru/XMM–Newton Deep Field (SXDF), made with the Very Large Array in B and C configurations. We present a radio map of the entire field, and a catalogue of 505 sources covering 0.8 deg2 to a peak flux density limit of 100 μJy. Robust optical identifications are provided for 90 per cent of the sources, and suggested identifications are presented for all but 14 (of which seven are optically blank, and seven are close to bright contaminating objects). We show that the optical properties of the radio sources do not change with flux density, suggesting that active galactic nuclei (AGN) continue to contribute significantly at faint flux densities. We test this assertion by cross-correlating our radio catalogue with the X-ray source catalogue and conclude that radio-quiet AGN become a significant population at flux densities below 300 μJy, and may dominate the population responsible for the flattening of the radio source counts if a significant fraction of them are Compton-thick

Australian right whale microsatellite and stable isotope data

This file contains the sampling location and state, mtDNA haplotype, sex, stable isotope and multi-locus microsatellite genotype data for Australian southern right whale samples used in the study

Comparing_stable_isotope&genetic_similarity_files

Dryad Archive for SREP16182: SI_SRW_data.zip. This zip file contains: 1 - Files of estimates of pairwise relatedness generated from microsatellite loci in SREP16182_SRWdata_Archive in the program COANCESTRY, using the kinship estimators of Lynch & Ritland 1999 (Lynch&Ritland_relatedness.txt) and Ritland 1996 (Ritland_relatedness.txt). 2 – Files of sample stable isotope values for both d13C (Sample_dC.txt) and d15N (Sample_dN.txt), as well as pairwise similarities of d13C calculated using Euclidean distance in program GENODIVE (dC_euclidean_correct_names.gdv). 3 – A file that includes d13C, d15N, mtDNA, sampling location and sex ID data for the samples used in the GLM work (SI_data_Aus_SRWtxt.txt) 4 – R code for (1) running the comparison of similarities between d13C and microsatellite-based kinship estimators and (2) running GLMs on d13C data, with mtDNA, sex and sampling state as potential explanatory factors. R code is annotated so it can be easily run if the files are placed in the appropriate files and required packages are downloaded

Evidence of a link between the evolution of clusters and their AGN fraction

We discuss the optical properties, X-ray detections and active galactic nucleus (AGN) populations of four clusters at z∼ 1 in the Subaru–XMM Deep Field (SXDF). The velocity distribution and plausible extended X-ray detections are examined, as well as the number of X-ray point sources and radio sources associated with the clusters. We find that the two clusters that appear virialized and have an extended X-ray detection contain few, if any, AGN, whereas the two pre-virialized clusters have a large AGN population. This constitutes evidence that the AGN fraction in clusters is linked to the clusters' evolutionary stage. The number of X-ray AGN in the pre-virialized clusters is consistent with an overdensity of a factor of ∼200; the radio AGN appear to be clustered with a factor of 3 to 6 higher. The median K-band luminosities of LK= 1.7 ± 0.7 L* for the X-ray sources and LK= 2.3 ± 0.1 L* for the radio sources support the theory that these AGN are triggered by galaxy interaction and merging events in sub-groups with low internal velocity distributions, which make up the cluster environment in a pre-virialization evolutionary stage