A5082756168- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Species Distribution and Climate Change
- Gamma-ray bursts and supernovae
- Multidisciplinary Science and Engineering Research
- Astronomy and Astrophysical Research
The Open University
2020-2023
The second data release of the LOFAR Two-Metre Sky Survey (LoTSS) covers 27% northern sky, with a total area ~5700 deg 1 . high angular resolution Dutch baselines (6 arcsec) allows us to carry out optical identifications large fraction detected radio sources without further followup; however, process is made more challenging by many extended found in images as result its excellent sensitivity structure. In this paper we present source associations and for based on near-infrared data, using...
Large-scale sky surveys at low frequencies, like the LOFAR Two-metre Sky Survey (LoTSS), allow for detection and characterisation of unprecedented numbers giant radio galaxies (GRGs, or 'giants'). In this work, by automating creation radio--optical catalogues, we aim to significantly expand census known giants. We then combine sample with a forward model constrain GRG properties cosmological interest. particular, automate source component association through machine learning optical host...
The effects of feedback from high luminosity radio-loud AGN have been extensively discussed in the literature, but low-luminosity is less well understood. advent sensitivity, angular resolution, large field view telescopes such as LOFAR now allowing wide-area studies faint sources for first time. Using data release Two Metre Sky Survey (LoTSS) we report on our discovery a population 195 radio galaxies with 150 MHz luminosities between $3\times10^{22}$ and $1.5\times10^{25}\text{ W Hz}^{-1}$...
Extended radio sources are an important minority population in modern deep surveys, because they enable detailed investigation of the physics governing radio-emitting regions such as active galaxies and their environments. Cross-identification with optical host is challenging for this extended population, due to morphological complexity multiple potential counterparts. In first data release Low-frequency array (LOFAR) Two-metre Sky Survey (LoTSS DR1) automated likelihood ratio compact was...
The second data release of the LOFAR Two-Metre Sky Survey (LoTSS) covers 27% northern sky, with a total area $\sim 5,700$ deg$^2$. high angular resolution Dutch baselines (6 arcsec) allows us to carry out optical identifications large fraction detected radio sources without further followup; however, process is made more challenging by many extended found in images as result its excellent sensitivity structure. In this paper we present source associations and for based on near-infrared data,...