output
20132026
most citedOn the evidence for a common-spectrum process in the search for the nanohertz gravitational-wave background with the Parkes Pulsar Timing Array

341 citations

Showing astro-ph.GAShow all

14 papers · 1 filter

astro-ph.GA2026

The metal-poor tail of the APOGEE survey II. Spectral analysis of Mg and Si in very metal-poor APOGEE spectra

M. Montelius, A. Angrilli Muglia, E. Starkenburg +9

H-band spectra contain very limited spectral information for stars at the most metal-poor tail ( Fe/H < -2.5) because the available Fe lines in FGK stars in this wavelength range a…

astro-ph.GA2025★ 8 cited

A Catalog of Galactic Supernova Remnants and Supernova Remnant Candidates from the EMU/POSSUM Radio Sky Surveys. I

B. D. Ball, R. Kothes, E. Rosolowsky +16

We use data from the EMU (Evolutionary Map of the Universe) and POSSUM (Polarization Sky Survey of the Universe's Magnetism) radio southern sky surveys, conducted with the Australi…

astro-ph.GA2024★ 5 cited

The Pristine Survey -- XXVII. Journey to the Galactic outskirts -- Mapping the outer halo red giant stars down to the very metal-poor end

Akshara Viswanathan, Amanda Byström, Else Starkenburg +14

Context: In the context of Galactic archaeology, the outer halo remains relatively unexplored with respect to its metallicity distribution, merger debris, and the abundance of know…

astro-ph.GA2023★ 25 cited

WALLABY Pilot Survey: the Potential Polar Ring Galaxies NGC~4632 and NGC~6156

N. Deg, R. Palleske, K. Spekkens +24

We report on the discovery of two potential polar ring galaxies (PRGs) in the WALLABY Pilot Data Release 1 (PDR1). These untargetted detections, cross-matched to NGC 4632 and NGC 6…

astro-ph.GA2023★ 8 cited

Selection of powerful radio galaxies with machine learning

R. Carvajal, I. Matute, J. Afonso +12

We developed and trained a pipeline of three machine learning (ML) models than can predict which sources are more likely to be an AGN and to be detected in specific radio surveys.…

astro-ph.GA2023★ 21 cited

MeerKAT view of the Dancing Ghosts -- Peculiar Galaxy Pair PKS 2130-538 in Abell 3785

Velibor Velović, William D. Cotton, Miroslav D. Filipovi'c +3

We present MeerKAT L-band (886-1682 MHz) observations of the extended radio structure of the peculiar galaxy pair PKS 2130-538 known as the "Dancing Ghosts". The complex of bending…

astro-ph.GA2022★ 11 cited

SPARCS-North Wide-field VLBI Survey: Exploring the resolved MicroJy extra-galactic radio source population with EVN+e-MERLIN

Ann Njeri, Robert J. Beswick, Jack F. Radcliffe +8

The SKA PAthfinder Radio Continuum Surveys (SPARCS) are providing deep-field imaging of the faint (sub-mJy) extra-galactic radio source populations through a series of reference su…

astro-ph.GA2022★ 4 cited

A Search for Missing Radio Sources at Using Lyman Dropouts

Devika Shobhana, Ray P. Norris, Miroslav D. Filipović +5

Using the Lyman Dropout technique, we identify 148 candidate radio sources at from the 887.5 MHz Australian Square Kilometer Array Pathfinder (ASKAP) observations…

astro-ph.GA2022★ 9 cited

Collimation of the kiloparsec-scale radio jets in NGC 2663

Velibor Velović, M. D. Filipović, L. Barnes +25

We present the discovery of highly-collimated radio jets spanning a total of 355 kpc around the nearby elliptical galaxy NGC 2663, and the possible first detection of recollimation…

astro-ph.GA2022★ 20 cited

ALMA/ACA CO Survey of the IC 1459 and NGC 4636 Groups: Environmental Effects on the Molecular Gas of Group Galaxies

Bumhyun Lee, Jing Wang, Aeree Chung +30

We present new results of a 12CO(J=1-0) imaging survey using the Atacama Compact Array (ACA) for 31 HI detected galaxies in the IC 1459 and NGC 4636 groups. This is the first CO im…

astro-ph.GA2022★ 50 cited

MeerKAT uncovers the physics of an Odd Radio Circle

Ray P. Norris, J. D. Collier, Roland M. Crocker +14

Odd Radio Circles (ORCs) are recently-discovered faint diffuse circles of radio emission, of unknown cause, surrounding galaxies at moderate redshift ($z ~ 0.2-0.6). Here we presen…

astro-ph.GA2021★ 8 cited

A Low Frequency Pilot Survey of Southern HII Regions in the Vela Constellation

Chenoa D. Tremblay, Tyler L. Bourke, James A. Green +3

Atomic ionised regions with strong continuum emission are often associated with regions of high-mass star formation and low-frequency (<2GHz) observations of these regions are need…

astro-ph.GA2021★ 23 cited

GASKAP Pilot Survey Science II: ASKAP Zoom Observations of Galactic 21-cm Absorption

J. M. Dickey, J. M. Dempsey, N. M. Pingel +12

Using the Australian Square Kilometre Array Pathfinder to measure 21-cm absorption spectra toward continuum background sources, we study the cool phase of the neutral atomic gas in…

astro-ph.GA2021★ 8 cited

Observations of cold extragalactic gas clouds at towards PKS 1610-771

Simon Weng, Elaine M. Sadler, Caroline Foster +7

We present results from MUSE observations of a 21-cm HI absorption system detected with the Australian Square Kilometre Array Pathfinder radio telescope at redshift to…