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View article: MeerKAT discovery of 164 compact radio rings towards the Galactic plane
MeerKAT discovery of 164 compact radio rings towards the Galactic plane Open
We report the discovery of 164 compact (radius < 1 arcmin) radio rings using MeerKAT 1.3 GHz data from the SARAO (South African Radio Astronomy Observatory) MeerKAT Galactic Plane Survey ($l=2^{\circ } \!-\! 60^{\circ }, 252^{\circ } \!…
View article: Broadband radio study of the supernova remnant Kes 73
Broadband radio study of the supernova remnant Kes 73 Open
Context . Strong shocks occurring in supernova remnants (SNRs), and their interaction with an often anisotropic surrounding medium, make SNRs ideal laboratories for studying the production and acceleration of cosmic rays (CRs). Due to thei…
View article: The SARAO MeerKAT Galactic Plane Survey extended source catalogue
The SARAO MeerKAT Galactic Plane Survey extended source catalogue Open
We present a catalogue of extended radio sources from the SARAO MeerKAT Galactic Plane Survey (SMGPS). Compiled from 56 survey tiles and covering approximately 500 deg 2 across the first, third, and fourth Galactic quadrants, the catalogue…
View article: A study in scarlet
A study in scarlet Open
Aims. We investigate the spectroscopic characteristics of intermediate-luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. Our goal is to provide a ste…
View article: A study in scarlet
A study in scarlet Open
Aims. We investigate the photometric characteristics of a sample of intermediate-luminosity red transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. Our goal is to pro…
View article: Evolutionary map of the Universe: Detection and analysis of the shell surrounding the runaway Wolf-Rayet star WR16
Evolutionary map of the Universe: Detection and analysis of the shell surrounding the runaway Wolf-Rayet star WR16 Open
We present the first radio–continuum detection of the circumstellar shell around the well-known WN8 type Wolf-Rayet star WR16 at 943.5 MHz using the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU…
View article: Diprotodon on the sky. The Large Galactic Supernova Remnant (SNR) G278.94+1.35
Diprotodon on the sky. The Large Galactic Supernova Remnant (SNR) G278.94+1.35 Open
We present a re-discovery of G278.94+1.35 as possibly one of the largest known Galactic supernova remnants (SNR) - that we name Diprotodon. While previously established as a Galactic SNR, Diprotodon is visible in our new EMU and GLEAM radi…
View article: Supernova remnant candidates discovered by the SARAO MeerKAT Galactic Plane Survey
Supernova remnant candidates discovered by the SARAO MeerKAT Galactic Plane Survey Open
Context . Sensitive radio continuum data could bring the number of known supernova remnants (SNRs) in the Galaxy more in line with what is expected. Due to confusion in the Galactic plane, however, faint SNRs can be challenging to distingu…
View article: Discovery of Perun (G329.9−0.5): a new, young, Galactic SNR
Discovery of Perun (G329.9−0.5): a new, young, Galactic SNR Open
We present the discovery of possibly the youngest Galactic supernova remnant (SNR) with associated pulsar-wind nebula (PWN), which we name Perun (G329.9−0.5). Perun was serendipitously discovered in the Australian Square Kilometre Array Pa…
View article: Supernova Remnant Candidates Discovered by the SARAO MeerKAT Galactic Plane Survey
Supernova Remnant Candidates Discovered by the SARAO MeerKAT Galactic Plane Survey Open
Context. Sensitive radio continuum data could remove the difference between the number of known supernova remnants (SNRs) in the Galaxy compared to that expected, but due to confusion in the Galactic plane, faint SNRs can be challenging to…
View article: MeerKAT reveals a ghostly thermal radio ring towards the Galactic Centre
MeerKAT reveals a ghostly thermal radio ring towards the Galactic Centre Open
We present the serendipitous discovery of a new radio-continuum ring-like object nicknamed Kýklos (J1802–3353), with MeerKAT UHF and L -band observations. The radio ring, which resembles the recently discovered odd radio circles (ORCs), ha…
View article: A study in scarlet -- II. Spectroscopic properties of a sample of Intermediate Luminosity Red Transients
A study in scarlet -- II. Spectroscopic properties of a sample of Intermediate Luminosity Red Transients Open
We investigate the spectroscopic characteristics of Intermediate Luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. We present the extensive optical a…
View article: A study in scarlet -- I. Photometric properties of a sample of Intermediate Luminosity Red Transients
A study in scarlet -- I. Photometric properties of a sample of Intermediate Luminosity Red Transients Open
We investigate the photometric characteristics of a sample of Intermediate Luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. We present the multi-wav…
View article: The SARAO MeerKAT 1.3 GHz Galactic Plane Survey
The SARAO MeerKAT 1.3 GHz Galactic Plane Survey Open
We present the SARAO MeerKAT Galactic Plane Survey (SMGPS), a 1.3 GHz continuum survey of almost half of the Galactic Plane (251° ≤l ≤ 358° and 2° ≤l ≤ 61° at |b| ≤ $1{_{.}^{\circ}}5$). SMGPS is the largest, most sensitive, and highest ang…
View article: Self-supervised contrastive learning of radio data for source detection, classification and peculiar object discovery
Self-supervised contrastive learning of radio data for source detection, classification and peculiar object discovery Open
New advancements in radio data post-processing are underway within the SKA precursor community, aiming to facilitate the extraction of scientific results from survey images through a semi-automated approach. Several of these developments l…
View article: The distance to CRL 618 through its radio expansion parallax
The distance to CRL 618 through its radio expansion parallax Open
CRL 618 is a post-AGB star that has started to ionize its ejecta. Its central HII region has been observed over the last 40 years and has steadily increased in flux density at radio wavelengths. In this paper, we present data that we obtai…
View article: The distance to CRL 618 through its radio expansion parallax
The distance to CRL 618 through its radio expansion parallax Open
CRL 618 is a post-Asymptotic Giant Branch star that has started to ionize its ejecta. Its central H ii region has been observed over the last 40 yr and has steadily increased in flux density at radio wavelengths. In this paper, we present …
View article: Classification of compact radio sources in the Galactic plane with supervised machine learning
Classification of compact radio sources in the Galactic plane with supervised machine learning Open
Generation of science-ready data from processed data products is one of the major challenges in next-generation radio continuum surveys with the Square Kilometre Array (SKA) and its precursors, due to the expected data volume and the need …
View article: Diprotodon on the sky. The Large Galactic Supernova Remnant (SNR) G278.94+1.35
Diprotodon on the sky. The Large Galactic Supernova Remnant (SNR) G278.94+1.35 Open
We present a re-discovery of G278.94+1.35 a as possibly one of the largest known Galactic supernova remnants (SNRs) – that we name Diprotodon. While previously established as a Galactic SNR, Diprotodon is visible in our new Evolutionary Ma…
View article: The SARAO MeerKAT 1.3 GHz Galactic Plane Survey
The SARAO MeerKAT 1.3 GHz Galactic Plane Survey Open
We present the SARAO MeerKAT Galactic Plane Survey (SMGPS), a 1.3 GHz continuum survey of almost half of the Galactic Plane (251°$\le l \le$ 358°and 2°$\le l \le$ 61°at $|b| \le 1.5°$). SMGPS is the largest, most sensitive and highest angu…
View article: EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8–6.3
EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8–6.3 Open
We present the serendipitous detection of a new Galactic supernova remnant (SNR), G288.8–6.3, using data from the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU) survey. Using multifrequency anal…
View article: EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8-6.3
EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8-6.3 Open
We present the serendipitous detection of a new Galactic Supernova Remnant (SNR), G288.8-6.3 using data from the Australian Square Kilometre Array Pathfinder (ASKAP)-Evolutionary Map of the Universe (EMU) survey. Using multi-frequency anal…
View article: The rich molecular environment of the luminous blue variable star AFGL 2298
The rich molecular environment of the luminous blue variable star AFGL 2298 Open
Context. Luminous blue variable (LBV) stars represent a short-lived stage in the late evolution of the most massive stars. Highly unstable, LBVs exhibit dense stellar winds and episodic eruptions that produce complex circumstellar nebulae,…
View article: The rich molecular environment of the luminous blue variable star AFGL 2298
The rich molecular environment of the luminous blue variable star AFGL 2298 Open
We investigated the molecular environment of AFGL 2298, an obscured Galactic Luminous blue variable (LBV) star which hosts a highly structured circumstellar environment with hints of multiple mass-loss events in the last few $10^4$ a. We p…
View article: RADiff: Controllable Diffusion Models for Radio Astronomical Maps Generation
RADiff: Controllable Diffusion Models for Radio Astronomical Maps Generation Open
Along with the nearing completion of the Square Kilometre Array (SKA), comes an increasing demand for accurate and reliable automated solutions to extract valuable information from the vast amount of data it will allow acquiring. Automated…
View article: A catalogue of radio supernova remnants and candidate supernova remnants in the EMU/POSSUM Galactic pilot field
A catalogue of radio supernova remnants and candidate supernova remnants in the EMU/POSSUM Galactic pilot field Open
We use data from the pilot observations of the EMU/POSSUM surveys to study the ‘missing supernova remnant (SNR) problem’, the discrepancy between the number of Galactic SNRs that have been observed, and the number that are estimated to exi…
View article: Star-Planet Interaction at radio wavelengths in YZ Ceti: Inferring planetary magnetic field
Star-Planet Interaction at radio wavelengths in YZ Ceti: Inferring planetary magnetic field Open
In exoplanetary systems, the interaction between the central star and the planet can trigger Auroral Radio Emission (ARE), due to the Electron Cyclotron Maser mechanism. The high brightness temperature of this emission makes it visible at …
View article: Radio astronomical images object detection and segmentation: A benchmark on deep learning methods
Radio astronomical images object detection and segmentation: A benchmark on deep learning methods Open
In recent years, deep learning has been successfully applied in various scientific domains. Following these promising results and performances, it has recently also started being evaluated in the domain of radio astronomy. In particular, s…
View article: Radio source analysis services for the SKA and precursors
Radio source analysis services for the SKA and precursors Open
New developments in data processing and visualization are being made in preparation for upcoming radioastronomical surveys planned with the Square Kilometre Array (SKA) and its precursors. A major goal is enabling extraction of science inf…
View article: First Detection of Silicon-bearing Molecules in η Car
First Detection of Silicon-bearing Molecules in η Car Open
We present ALMA band 6 observations of the luminous blue variable η Car obtained within the ALMAGAL program. We report SiO J = 5 → 4, SiS J = 12 → 11, and SiN N = 5 → 4 emission in the equatorial region of the Homunculus nebula, constituti…