Search Publications
Dust, CO, and [C I]: cross-calibration of molecular gas mass tracers in metal-rich galaxies across cosmic time
Ivison, R. J.; Dunne, L.; Gomez, H. L. +2 more
We present a self-consistent cross-calibration of the three main molecular gas mass tracers in galaxies, namely the 12CO(1-0), [C I](3P1-3P0) lines, and the submm dust continuum emission, using a sample of 407 galaxies, ranging from local discs to submillimetre-selected galaxies (SMGs) up to z…
Accretion mode versus radio morphology in the LOFAR Deep Fields
Bondi, M.; Prandoni, I.; Shimwell, T. W. +17 more
Radio-loud active galaxies have two accretion modes [radiatively inefficient (RI) and radiatively efficient (RE)], with distinct optical and infrared signatures, and two jet dynamical behaviours, which in arcsec- to arcmin-resolution radio surveys manifest primarily as centre- or edge-brightened structures [Fanaroff-Riley (FR) class I and II]. The…
Cosmic evolution of low-excitation radio galaxies in the LOFAR two-metre sky survey deep fields
Calistro Rivera, Gabriela; Małek, Katarzyna; Wang, Lingyu +16 more
Feedback from low-excitation radio galaxies (LERGs) plays a key role in the lifecycle of massive galaxies in the local Universe; their evolution, and the impact of these active galactic nuclei on early galaxy evolution, however, remain poorly understood. We use a sample of 10 481 LERGs from the first data release of the LOFAR two-metre Sky Survey …
MIGHTEE: the nature of the radio-loud AGN population
Prandoni, I.; Bowler, R. A. A.; Marchetti, L. +24 more
We study the nature of the faint radio source population detected in the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Early Science data in the COSMOS field, focusing on the properties of the radio-loud active galactic nuclei (AGNs). Using the extensive multiwavelength data available in the field, we are able to classify 88…
Mapping the magnetic field in the Taurus/B211 filamentary cloud with SOFIA HAWC + and comparing with simulation
André, Philippe; Rho, Jeonghee; Li, Pak Shing +4 more
Optical and infrared polarization mapping and recent Planck observations of the filametary cloud L1495 in Taurus show that the large-scale magnetic field is approximately perpendicular to the long axis of the cloud. We use the HAWC + polarimeter on SOFIA to probe the complex magnetic field in the B211 part of the cloud. Our results reveal a disper…
Radio and far-IR emission associated with a massive star-forming galaxy candidate at z ≃ 6.8: a radio-loud AGN in the reionization era?
Fan, Xiaohui; Stark, Daniel P.; Endsley, Ryan +7 more
We report the identification of radio (0.144-3 GHz) and mid-, far-infrared, and sub-mm (24-850µm) emission at the position of one of 41 UV-bright ($\mathrm{M_{\mathrm{UV}}}^{ }\lesssim -21.25$) z ≃ 6.6-6.9 Lyman-break galaxy candidates in the 1.5 deg2 COSMOS field. This source, COS-87259, exhibits a sharp flux discontinuity (facto…
The early Universe was dust-rich and extremely hot
Moncelsi, Lorenzo; Sun, Guochao; Viero, Marco P. +2 more
We investigate the dust properties and star-formation signature of galaxies in the early Universe by stacking 111 227 objects in the recently released COSMOS catalogue on maps at wavelengths bracketing the peak of warmed dust emission. We find an elevated far-infrared luminosity density to redshift 8, indicating abundant dust in the early Universe…
The bright extragalactic ALMA redshift survey (BEARS) I: redshifts of bright gravitationally lensed galaxies from the Herschel ATLAS
Berta, S.; Andreani, P.; Omont, A. +53 more
We present spectroscopic measurements for 71 galaxies associated with 62 of the brightest high-redshift submillimetre sources from the Southern fields of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), while targeting 85 sources which resolved into 142. We have obtained robust redshift measurements for all sources using the 12-m …
Deep ASKAP EMU Survey of the GAMA23 field: properties of radio sources
Prandoni, I.; Marchetti, L.; Vaccari, M. +19 more
We present the Australian Square Kilometre Array Pathfinder (ASKAP) observations of the Galaxy and Mass Assembly (GAMA)-23h field. The survey was carried out at 887.5 MHz and covers an ~83 square deg field. We imaged the calibrated visibility data, taken as part of the Evolutionary Mapping of Universe Early Science Programme, using the latest vers…
Mira variables in the Milky Way's nuclear stellar disc: discovery and classification
Smith, Leigh C.; Matsunaga, Noriyuki; Minniti, Dante +3 more
The properties of the Milky Way's nuclear stellar disc give crucial information on the epoch of bar formation. Mira variables are promising bright candidates to study the nuclear stellar disc, and through their period-age relation dissect its star formation history. We report on a sample of 1782 Mira variable candidates across the central $3\times…