A5102715489- Radio Astronomy Observations and Technology
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
University of Hertfordshire
2024-2025
The role of radio mode active galactic nuclei (AGN) feedback on galaxy evolution is still under debate. In this study we utilized a combination continuum observations and optical integral field spectroscopic (IFS) data to explore the impact AGN their host galaxies at global subgalactic scales. We constructed comprehensive radio-IFS sample comprising 5548 with redshift z<0.15 by cross-matching LOFAR Two-Metre Sky Survey (LoTSS) Mapping Nearby Galaxies APO (MaNGA) survey. revisited tight...
ABSTRACT Spectral energy distribution (SED) fitting has been extensively used to determine the nature of faint radio source population. Recent efforts have combined fits from multiple SED-fitting codes account for host galaxy and any active nucleus that may be present. We show it is possible produce similar-quality classifications using a single energy-balance SED code, prospector, model up 26 bands UV–far-infrared aperture-matched photometry ∼31 000 sources in ELAIS-N1 field LOFAR Two-Metre...
ABSTRACT We use new 144 MHz observations over 5634 deg2 from the LOFAR (Low Frequency Array) Two-metre Sky Survey (LoTSS) to compile largest sample of uniformly selected, spectroscopically confirmed quasars 14th data release Sloan Digital (SDSS-DR14). Using classical definition radio loudness, R = log (L1.4GHz/Li), we identify 3697 radio-loud (RL) and 111 132 radio-quiet (RQ) sources at 0.6 &lt; z 3.4. To study their properties, develop a rest-frame spectral stacking algorithm, designed...
Abstract Whether the mass of supermassive black hole (MBH) is directly linked to quasar radio luminosity remains a long-debated issue, and understanding role MBH in evolution quasars pivotal unveiling mechanism AGN feedback. In this work, based on two-component Bayesian model, we examine how affects emission from quasars, separating contributions host galaxy star formation (SF) activity. By modelling flux density distribution Sloan Digital Sky Survey (SDSS) LOFAR Two-metre Data Release 2,...
ABSTRACT We present an analysis of 152 355 radio sources identified in the second data release LOFAR Two Metre Sky Survey (LoTSS-DR2) with Sloan Digital (SDSS) spectroscopic redshifts range $0.00 \lt z 0.57$. Using Monte Carlo simulations, we determine reliability each source exhibiting excess luminosity relative to that predicted from their H $\alpha$ emission, and, for a subset 124 023 combine this measurement full BPT analysis. these two independent diagnostics, hosting supermassive black...
Spectral energy distribution (SED) fitting has been extensively used to determine the nature of faint radio source population. Recent efforts have combined fits from multiple SED-fitting codes account for host galaxy and any active nucleus that may be present. We show it is possible produce similar-quality classifications using a single energy-balance SED code, Prospector, model up 26 bands UV$-$far-infrared aperture-matched photometry $\sim$31,000 sources in ELAIS-N1 field LOFAR Two-Metre...
The role of radio mode AGN feedback on galaxy evolution is still under debate. In this study, we utilize a combination continuum observations and optical integral field spectroscopic (IFS) data to explore the impact their host galaxies at both global sub-galactic scales. We construct comprehensive radio-IFS sample comprising 5578 with redshift z < 0.15 by cross-matching LOFAR Two-Metre Sky Survey (LoTSS) MaNGA survey. revisit tight linear - star formation relation quantify its intrinsic...
We present a detailed study of the large-scale shock front in Stephan's Quintet, byproduct past and ongoing interactions. Using integral-field spectroscopy from new William Herschel Telescope Enhanced Area Velocity Explorer (WEAVE), recent 144 MHz observations LOFAR Two-metre Sky Survey (LoTSS), archival data Very Large Array James Webb Space (JWST), we obtain measurements key properties determine its impact on system. Harnessing WEAVE large integral field unit's (LIFU) view (90 $\times$ 78...