J. Delhaize
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View article: MIGHTEE-H <scp>i</scp> : the direct detection of neutral hydrogen in galaxies at <i>z</i> &gt; 0.25
MIGHTEE-H <span>i</span> : the direct detection of neutral hydrogen in galaxies at <i>z</i> > 0.25 Open
Atomic hydrogen constitutes the gas reservoir from which molecular gas and star formation in galaxies emerges. However, the weakness of the line means it has been difficult to directly detect in all but the very local Universe. Here, we pr…
View article: Probing the formation of megaparsec-scale giant radio galaxies II. Continuum & polarization behavior from MHD simulations
Probing the formation of megaparsec-scale giant radio galaxies II. Continuum & polarization behavior from MHD simulations Open
The persistence of radiative signatures in giant radio galaxies remains a frontier topic of research, with contemporary telescopes revealing intricate features that require investigation. This study aims to examine the emission characteris…
View article: Investigating the influence of radio-faint AGN activity on the infrared-radio correlation of massive galaxies
Investigating the influence of radio-faint AGN activity on the infrared-radio correlation of massive galaxies Open
It is well-known that star-forming galaxies (SFGs) exhibit a tight correlation between their radio and infrared emissions, commonly referred to as the infrared-radio correlation (IRRC). Recent empirical studies have reported a dependence o…
View article: MIGHTEE-HI: The direct detection of neutral hydrogen in galaxies at $z>0.25$
MIGHTEE-HI: The direct detection of neutral hydrogen in galaxies at $z>0.25$ Open
Atomic hydrogen constitutes the gas reservoir from which molecular gas and star formation in galaxies emerges. However, the weakness of the line means it has been difficult to directly detect in all but the very local Universe. Here we pre…
View article: Looking at the Distant Universe with the MeerKAT Array: The H <scp>i</scp> Mass Function in the Local Universe
Looking at the Distant Universe with the MeerKAT Array: The H <span>i</span> Mass Function in the Local Universe Open
We present measurements of the neutral atomic hydrogen (H i ) mass function (H i MF) and cosmic H i density (Ω H I ) at 0 ≤ z ≤ 0.088 from the Looking at the Distant Universe with MeerKAT Array (LADUMA) survey. Using LADUMA Data Release 1 …
View article: Looking At the Distant Universe with the MeerKAT Array: the HI Mass Function in the Local Universe
Looking At the Distant Universe with the MeerKAT Array: the HI Mass Function in the Local Universe Open
We present measurements of the neutral atomic hydrogen (HI) mass function (HIMF) and cosmic HI density ($Ω_{\rm HI}$) at $0 \leq z \leq 0.088$ from the Looking at the Distant Universe with MeerKAT Array (LADUMA) survey. Using LADUMA Data R…
View article: Probing the formation of megaparsec-scale giant radio galaxies
Probing the formation of megaparsec-scale giant radio galaxies Open
Context. Constituting a relatively small fraction of the extended-jetted population, giant radio galaxies (GRGs) form in a wide range of jet and environment configurations. This observed diversity complicates the identification of the grow…
View article: A spatially resolved spectral analysis of giant radio galaxies with MeerKAT
A spatially resolved spectral analysis of giant radio galaxies with MeerKAT Open
In this study we report the spatially resolved, wideband spectral properties of three giant radio galaxies (GRGs) in the COSMOS field: MGTC J095959.63+024608.6, MGTC J100016.84+015133.0, and MGTC J100022.85+031520.4. One of these galaxies,…
View article: Probing the Formation of Megaparsec-scale Giant Radio Galaxies (I): Dynamical Insights from MHD Simulations
Probing the Formation of Megaparsec-scale Giant Radio Galaxies (I): Dynamical Insights from MHD Simulations Open
Giant radio galaxies (GRGs), a minority among the extended-jetted population, form in a wide range of jet and environmental configurations, complicating the identification of the growth factors that facilitate their attainment of megaparse…
View article: A spatially-resolved spectral analysis of giant radio galaxies with MeerKAT
A spatially-resolved spectral analysis of giant radio galaxies with MeerKAT Open
In this study we report spatially resolved, wideband spectral properties of three giant radio galaxies (GRGs) in the COSMOS field: MGTC J095959.63+024608.6 , MGTC J100016.84+015133.0 and MGTC J100022.85+031520.4. One such galaxy MGTC J1000…
View article: Galaxy populations and redshift dependence of the correlation between infrared and radio luminosity
Galaxy populations and redshift dependence of the correlation between infrared and radio luminosity Open
We argue that the difference in infrared-to-radio luminosity ratio between local and high-redshift star-forming galaxies reflects the alternative physical conditions –including magnetic field configurations– of the dominant population of s…
View article: Galaxy populations and redshift dependence of the correlation between infrared and radio luminosity
Galaxy populations and redshift dependence of the correlation between infrared and radio luminosity Open
We argue that the difference in infrared-to-radio luminosity ratio between local and high-redshift star-forming galaxies reflects {the alternative physical conditions} -- including magnetic field configurations -- of the dominant populatio…
View article: MIGHTEE: Multi-wavelength counterparts in the COSMOS field
MIGHTEE: Multi-wavelength counterparts in the COSMOS field Open
In this paper, we combine the Early Science radio continuum data from the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey, with optical and near-infrared data and release the cross-matched catalogues. The radio …
View article: MIGHTEE: multi-wavelength counterparts in the COSMOS field
MIGHTEE: multi-wavelength counterparts in the COSMOS field Open
In this paper we combine the Early Science radio continuum data from the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey, with optical and near-infrared data and release the cross-matched catalogues. The radio d…
View article: MIGHTEE-H <scp>i</scp>: possible interactions with the galaxy NGC 895
MIGHTEE-H <span>i</span>: possible interactions with the galaxy NGC 895 Open
The transformation and evolution of a galaxy is strongly influenced by interactions with its environment. Neutral hydrogen (H i) is an excellent way to trace these interactions. Here, we present H i observations of the spiral galaxy NGC 89…
View article: MIGHTEE-\HI: Possible interactions with the galaxy NGC~895
MIGHTEE-\HI: Possible interactions with the galaxy NGC~895 Open
The transformation and evolution of a galaxy is strongly influenced by interactions with its environment. Neutral hydrogen (\HI) is an excellent way to trace these interactions. Here, we present \HI\ observations of the spiral galaxy NGC~8…
View article: MIGHTEE: the nature of the radio-loud AGN population
MIGHTEE: the nature of the radio-loud AGN population Open
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 galac…
View article: MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*
MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5* Open
We present the first measurements of H i galaxy scaling relations from a blind survey at z > 0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in H i at 0.23 < z < 0.49, extracted from MIGHTEE-H i Early…
View article: Looking at the Distant Universe with the MeerKAT Array: Discovery of a Luminous OH Megamaser at z > 0.5
Looking at the Distant Universe with the MeerKAT Array: Discovery of a Luminous OH Megamaser at z > 0.5 Open
In the local universe, OH megamasers (OHMs) are detected almost exclusively in infrared-luminous galaxies, with a prevalence that increases with IR luminosity, suggesting that they trace gas-rich galaxy mergers. Given the proximity of the …
View article: Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data
Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data Open
We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H i of the Universe at redshifts z < 0.1. Results are obtained using a stacking …
View article: Radio spectral properties of star-forming galaxies in the MIGHTEE-COSMOS field and their impact on the far-infrared-radio correlation
Radio spectral properties of star-forming galaxies in the MIGHTEE-COSMOS field and their impact on the far-infrared-radio correlation Open
We study the radio spectral properties of 2094 star-forming galaxies (SFGs) by combining our early science data from the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) survey with VLA, GMRT radio data, and rich ancill…
View article: Measuring Cosmic Density of Neutral Hydrogen via Stacking the DINGO-VLA Data
Measuring Cosmic Density of Neutral Hydrogen via Stacking the DINGO-VLA Data Open
We use the 21 cm emission line data from the DINGO-VLA project to study the atomic hydrogen gas H\,{\textsc i} of the Universe at redshifts $z<0.1$. Results are obtained using a stacking analysis, combining the H\,{\textsc i} signals from …
View article: The non-linear infrared-radio correlation of low-<i>z</i> galaxies: implications for redshift evolution, a new radio SFR recipe, and how to minimize selection bias
The non-linear infrared-radio correlation of low-<i>z</i> galaxies: implications for redshift evolution, a new radio SFR recipe, and how to minimize selection bias Open
The infrared-radio correlation (IRRC) underpins many commonly used radio luminosity–star formation rate (SFR) calibrations. In preparation for the new generation of radio surveys, we revisit the IRRC of low-z galaxies by (a) drawing on the…
View article: The infrared-radio correlation of star-forming galaxies is strongly M⋆-dependent but nearly redshift-invariant since z ∼ 4
The infrared-radio correlation of star-forming galaxies is strongly M⋆-dependent but nearly redshift-invariant since z ∼ 4 Open
Over the past decade, several works have used the ratio between total (rest 8‒1000 μm) infrared and radio (rest 1.4 GHz) luminosity in star-forming galaxies (qIR), often referred to as the infrared-radio correlation (IRRC), to calibrate th…
View article: MIGHTEE: are giant radio galaxies more common than we thought?
MIGHTEE: are giant radio galaxies more common than we thought? Open
We report the discovery of two new giant radio galaxies (GRGs) using the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) survey. Both GRGs were found within a ${\sim}1\,$ deg2 region inside the COSMOS field. They have …
View article: The VLA-COSMOS 3 GHz Large Project: Average radio spectral energy distribution of active galactic nuclei
The VLA-COSMOS 3 GHz Large Project: Average radio spectral energy distribution of active galactic nuclei Open
Context. As the Square Kilometer Array (SKA) is expected to be operational in the next decade, investigations of the radio sky in the range of 100 MHz–10 GHz have become important for simulating SKA observations. In determining physical pr…
View article: The XXL Survey
The XXL Survey Open
We studied a sample of 274 radio and X-ray selected quasars (XQSOs) detected in the COSMOS and XXL-S radio surveys at 3 GHz and 2.1 GHz, respectively. This sample was identified by adopting a conservative threshold in X-ray luminosity, L X…
View article: The VLA-COSMOS 3 GHz Large Project: Average radio spectral energy distribution of highly star-forming galaxies
The VLA-COSMOS 3 GHz Large Project: Average radio spectral energy distribution of highly star-forming galaxies Open
\nWe construct the average radio spectral energy distribution (SED) of highly star-forming galaxies (HSFGs) up to z ∼ 4. Infrared and radio luminosities are bound by a tight correlation that is defined by the so-called q parameter. This in…
View article: SMBH accretion properties of radio-selected AGN out to z ∼ 4
SMBH accretion properties of radio-selected AGN out to z ∼ 4 Open
I will discuss the most recent results about Active Galactic Nuclei (AGN) accretion in radio-selected AGN, which are key laboratories for studying supermassive black hole (SMBH) activity, and its role in quenching galaxy star formation. Th…
View article: The XXL Survey
The XXL Survey Open
Context. To investigate the nature of the extragalactic radio sources, it is necessary to couple radio surveys with multiwavelength observations over large areas of the sky. The XMM-Newton Extragalactic (XXL) survey is the largest survey e…