C. Murugeshan
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View article: WALLABY: an untargeted search for H <scp>i</scp> -bearing ultra-diffuse galaxies uncovers the first known ultra-diffuse galaxy pair
WALLABY: an untargeted search for H <span>i</span> -bearing ultra-diffuse galaxies uncovers the first known ultra-diffuse galaxy pair Open
Using the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY), we performed an untargeted search for H i-bearing ultra-diffuse galaxies (UDGs). We identified a core sample of 10 UDGs defined by $\mu _{0,g}\ge 24$ mag arcsec$^{-2}$…
View article: WALLABY pilot survey: properties of HI-selected dark sources and low surface brightness galaxies
WALLABY pilot survey: properties of HI-selected dark sources and low surface brightness galaxies Open
We examine the optical counterparts of the 1829 neutral hydrogen (HI) detections in three pilot fields in the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY) using data from the Dark Energy Spectroscopic Instrument (DESI) Lega…
View article: WALLABY Pilot Survey: HI source-finding with a machine learning framework
WALLABY Pilot Survey: HI source-finding with a machine learning framework Open
The data volumes generated by theWidefield ASKAP L-band Legacy All-sky Blind surveY atomic hydrogen ( Hi ) survey using the Australian Square Kilometre Array Pathfinder (ASKAP) necessitate greater automation and reliable automation in the …
View article: WALLABY pilot survey: Properties of H <scp>i</scp>-selected dark sources and low surface brightness galaxies
WALLABY pilot survey: Properties of H <span>i</span>-selected dark sources and low surface brightness galaxies Open
We examine the optical counterparts of the 1 829 neutral hydrogen (H i ) detections in three pilot fields in the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY) using data from the Dark Energy Spectroscopic Instrument (DESI) L…
View article: WALLABY pilot survey: Spatially resolved gas scaling relations within the stellar discs of nearby galaxies
WALLABY pilot survey: Spatially resolved gas scaling relations within the stellar discs of nearby galaxies Open
The scatter in global atomic hydrogen (H i ) scaling relations is partly attributed to differences in how H i and stellar properties are measured, with H i reservoirs typically extending beyond the inner regions of galaxies where star form…
View article: WALLABY Pilot Survey: Public data release of ~1800 HI sources and high-resolution cut-outs from Pilot Survey Phase 2
WALLABY Pilot Survey: Public data release of ~1800 HI sources and high-resolution cut-outs from Pilot Survey Phase 2 Open
We present the Pilot Survey Phase 2 data release for the Wide-field ASKAP L-band Legacy All-sky Blind surveY (WALLABY), carried-out using the Australian SKA Pathfinder (ASKAP). We present 1760 HI detections (with a default spatial resoluti…
View article: WALLABY Pilot Survey: HI source-finding with a machine learning framework
WALLABY Pilot Survey: HI source-finding with a machine learning framework Open
The data volumes generated by the WALLABY atomic Hydrogen (HI) survey using the Australiian Square Kilometre Array Pathfinder (ASKAP) necessitate greater automation and reliable automation in the task of source-finding and cataloguing. To …
View article: WALLABY pilot survey: an ‘almost’ dark cloud near the Hydra cluster
WALLABY pilot survey: an ‘almost’ dark cloud near the Hydra cluster Open
We explore the properties of an ‘almost’ dark cloud of neutral hydrogen (H i) using data from the Widefield ASKAP L-band Legacy All-sky Survey (WALLABY). Until recently, WALLABY J103508 − 283427 (also known as H1032 − 2819 or LEDA 2793457)…
View article: WALLABY Pilot Survey: An 'Almost' Dark Cloud near the Hydra Cluster
WALLABY Pilot Survey: An 'Almost' Dark Cloud near the Hydra Cluster Open
We explore the properties of an 'almost' dark cloud of neutral hydrogen (HI) using data from the Widefield ASKAP L-band Legacy All-sky Survey (WALLABY). Until recently, WALLABY J103508-283427 (also known as H1032-2819 or LEDA 2793457) was …
View article: WALLABY Pilot Survey: Public data release of ∼ 1800 H <scp>i</scp> sources and high-resolution cut-outs from Pilot Survey Phase 2
WALLABY Pilot Survey: Public data release of ∼ 1800 H <span>i</span> sources and high-resolution cut-outs from Pilot Survey Phase 2 Open
We present the Pilot Survey Phase 2 data release for the Wide-field ASKAP L-band Legacy All-sky Blind surveY (WALLABY), carried-out using the Australian SKA Pathfinder (ASKAP). We present 1760 H i detections (with a default spatial resolut…
View article: WALLABY pre-pilot survey: ultra-diffuse galaxies in the Eridanus supergroup
WALLABY pre-pilot survey: ultra-diffuse galaxies in the Eridanus supergroup Open
We present a pilot study of the atomic neutral hydrogen gas (H i) content of ultra-diffuse galaxy (UDG) candidates. In this paper, we use the pre-pilot Eridanus field data from the Widefield ASKAP L-band Legacy All-sky Blind Survey to sear…
View article: WALLABY Pre-Pilot Survey: Ultra-Diffuse Galaxies in the Eridanus Supergroup
WALLABY Pre-Pilot Survey: Ultra-Diffuse Galaxies in the Eridanus Supergroup Open
We present a pilot study of the atomic neutral hydrogen gas (HI) content of ultra-diffuse galaxy (UDG) candidates. In this paper, we use the pre-pilot Eridanus field data from the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY…
View article: WALLABY pilot survey: the potential polar ring galaxies NGC 4632 and NGC 6156
WALLABY pilot survey: the potential polar ring galaxies NGC 4632 and NGC 6156 Open
We report on the discovery of two potential polar ring galaxies (PRGs) in the WALLABY Pilot Data Release 1 (PDR1). These untargeted detections, cross-matched to NGC 4632 and NGC 6156, are some of the first galaxies where the H i observatio…
View article: WALLABY Pilot Survey: The diversity of HI structural parameters in nearby galaxies
WALLABY Pilot Survey: The diversity of HI structural parameters in nearby galaxies Open
We investigate the diversity in the sizes and average surface densities of the neutral atomic hydrogen (HI) gas discs in ~280 nearby galaxies detected by the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY). We combine the unif…
View article: WALLABY Pilot Survey: H i in the Host Galaxy of a Fast Radio Burst
WALLABY Pilot Survey: H i in the Host Galaxy of a Fast Radio Burst Open
We report on the commensal ASKAP detection of a fast radio burst (FRB), FRB 20211127I, and the detection of neutral hydrogen (H i ) emission in the FRB host galaxy, WALLABY J131913–185018 (hereafter W13–18). This collaboration between the …
View article: The HI in Ring Galaxies Survey (HI-RINGS) -- Effects of the bar on the HI gas in ring galaxies
The HI in Ring Galaxies Survey (HI-RINGS) -- Effects of the bar on the HI gas in ring galaxies Open
We present a new high-resolution neutral atomic hydrogen (HI) survey of ring galaxies using the Australia Telescope Compact Array (ATCA). We target a sample of 24 ring galaxies from the Buta (1995) Southern Ring Galaxy Survey Catalogue in …
View article: WALLABY Pre-Pilot Survey: Radio Continuum Properties of the Eridanus Supergroup
WALLABY Pre-Pilot Survey: Radio Continuum Properties of the Eridanus Supergroup Open
We present the highest resolution and sensitivity $\sim1.4\,$GHz continuum observations of the Eridanus supergroup obtained as a part of the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY) pre-pilot observations using the Aust…
View article: WALLABY pilot survey: The diversity of HI structural parameters in nearby galaxies
WALLABY pilot survey: The diversity of HI structural parameters in nearby galaxies Open
We investigate the diversity in the sizes and average surface densities of the neutral atomic hydrogen (H i ) gas discs in $\sim$ 280 nearby galaxies detected by the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY). We combine …
View article: The H<scp>i</scp>in Ring Galaxies Survey (H<scp>i</scp>-RINGS)—Effects of the bar on the H<scp>i</scp>gas in ring galaxies
The H<span>i</span>in Ring Galaxies Survey (H<span>i</span>-RINGS)—Effects of the bar on the H<span>i</span>gas in ring galaxies Open
We present a new high-resolution neutral atomic hydrogen (H i ) survey of ring galaxies using the Australia Telescope Compact Array (ATCA). We target a sample of 24 ring galaxies from the Buta (1995) Southern Ring Galaxy Survey Catalogue i…
View article: WALLABY pre-pilot survey: Radio continuum properties of the Eridanus supergroup
WALLABY pre-pilot survey: Radio continuum properties of the Eridanus supergroup Open
We present the highest resolution and sensitivity $\sim$ $1.4\,$ GHz continuum observations of the Eridanus supergroup obtained as a part of the Widefield Australian Square Kilometer Array Pathfinder (ASKAP) L -band Legacy All-sky Blind su…
View article: Survey-scale discovery-based research processes: Evaluating a bespoke visualisation environment for astronomical survey data
Survey-scale discovery-based research processes: Evaluating a bespoke visualisation environment for astronomical survey data Open
Next-generation astronomical surveys naturally pose challenges for human-centred visualisation and analysis workflows that currently rely on the use of standard desktop display environments. While a significant fraction of the data prepara…
View article: A global view on star formation: The GLOSTAR Galactic plane survey
A global view on star formation: The GLOSTAR Galactic plane survey Open
Class II methanol (CH 3 OH) masers are amongst the clearest signposts of recent high-mass star formation (HMSF). A complete catalogue outlines the distribution of star formation in the Galaxy, the number of young star-forming cores, and th…
View article: WALLABY Pre-pilot Survey: The Effects of Tidal Interaction on Radial Distribution of Color in Galaxies of the Eridanus Supergroup
WALLABY Pre-pilot Survey: The Effects of Tidal Interaction on Radial Distribution of Color in Galaxies of the Eridanus Supergroup Open
We study the tidal interaction of galaxies in the Eridanus supergroup, using H i data from the pre-pilot survey of the Widefield ASKAP L -band Legacy All-sky Blind surveY. We obtain optical photometric measurements and quantify the strengt…
View article: WALLABY Pilot Survey: Public release of HI kinematic models for more than 100 galaxies from phase 1 of ASKAP pilot observations
WALLABY Pilot Survey: Public release of HI kinematic models for more than 100 galaxies from phase 1 of ASKAP pilot observations Open
We present the Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY) Pilot Phase I H i kinematic models. This first data release consists of H i observations of three fields in the direction of the Hydra and Norma clusters, and the …
View article: WALLABY pilot survey: Public release of H <scp>i</scp> data for almost 600 galaxies from phase 1 of ASKAP pilot observations
WALLABY pilot survey: Public release of H <span>i</span> data for almost 600 galaxies from phase 1 of ASKAP pilot observations Open
We present WALLABY pilot data release 1, the first public release of H i pilot survey data from the Wide-field ASKAP L-band Legacy All-sky Blind Survey (WALLABY) on the Australian Square Kilometre Array Pathfinder. Phase 1 of the WALLABY p…
View article: WALLABY pilot survey: H <scp>i</scp> gas disc truncation and star formation of galaxies falling into the Hydra I cluster
WALLABY pilot survey: H <span>i</span> gas disc truncation and star formation of galaxies falling into the Hydra I cluster Open
We present results from our analysis of the Hydra I cluster observed in neutral atomic hydrogen (H i) as part of the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY). These WALLABY observations cover a 60-square-degree field of…
View article: WALLABY Pilot Survey: HI gas disc truncation and star formation of galaxies falling into the Hydra I cluster
WALLABY Pilot Survey: HI gas disc truncation and star formation of galaxies falling into the Hydra I cluster Open
We present results from our analysis of the Hydra I cluster observed in neutral atomic hydrogen (HI) as part of the Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY). These WALLABY observations cover a 60-square-degree field of …
View article: WALLABY Pre-Pilot Survey: the effects of angular momentum and environment on the H <scp>i</scp> gas and star formation properties of galaxies in the Eridanus supergroup
WALLABY Pre-Pilot Survey: the effects of angular momentum and environment on the H <span>i</span> gas and star formation properties of galaxies in the Eridanus supergroup Open
We use high-resolution ASKAP observations of galaxies in the Eridanus supergroup to study their H i, angular momentum, and star formation properties, as part of the WALLABY pre-pilot survey efforts. The Eridanus supergroup is composed of t…
View article: WALLABY pre-pilot survey: two dark clouds in the vicinity of NGC 1395
WALLABY pre-pilot survey: two dark clouds in the vicinity of NGC 1395 Open
We present the Australian Square Kilometre Array Pathfinder (ASKAP) WALLABY pre-pilot observations of two ‘dark’ H i sources (with H i masses of a few times 108 $\rm {M}_\odot$ and no known stellar counterpart) that reside within 363 kpc o…