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New radio continuum study of the large magellanic cloud supernova remnant N49
Sasaki, Manami; Haberl, Frank; Kavanagh, Patrick +12 more
We present new Australia Telescope Compact Array (ATCA) radio observations towards N 49, one of the brightest extragalactic supernova remnants (SNRs) located in the Large Magellanic Cloud (LMC). Our new and archival ATCA radio observations were analysed along with Chandra X-ray data. These observations show a prominent 'bullet' shaped feature beyo…
A jet-induced shock in a young, powerful radio galaxy at z = 3.00
Noirot, Gaël; Gupta, Anshu; Emonts, Bjorn +9 more
The bright radio source, GLEAM J091734 - 001243 (hereafter GLEAM J0917 - 0012), was previously selected as a candidate ultra-high redshift ( z > 5 ) radio galaxy due to its compact radio size and faint magnitude ( K(AB)=22.7 ). Its redshift was not conclusively determined from follow-up millimetre and near-infrared spectroscopy. Here we present…
Comparative study of the W UMa type binaries S Ant and ε CrA
Erdem, Ahmet; Bakış, Volkan; Blackford, Mark G. +6 more
Contact binaries challenge contemporary stellar astrophysics with respect to their incidence, structure, and evolution. We explore these issues through a detailed study of two bright examples: S Ant and $\varepsilon$ CrA, that permit high-resolution spectroscopy at a relatively good S/N ratio. The availability of high-quality photometry, including…
MOSEL survey: Unwrapping the Epoch of Reionisation through mimic galaxies at Cosmic Noon
Harshan, Anishya; Gupta, Anshu; Trott, Cathryn M. +4 more
The nature of the first galaxies that reionised the universe during the Epoch of Reionisation (EoR) remains unclear. Attempts to directly determine spectral properties of these early galaxies are affected by both limited photometric constraints across the spectrum and by the opacity of the intergalactic medium to the Lyman Continuum (LyC) at high …
Searching for stellar population in the molecular cloud GRSMC 045.49+00.04
Elia, Davide; Azatyan, Naira; Nikoghosyan, Elena +5 more
Understanding the characteristics of young stellar populations is essential for deriving insights into star formation processes within parent molecular clouds and the influence of massive stars on these processes. This study primarily aims to investigate the young stellar objects (YSOs) within the molecular cloud G 045.49+00.04, including three ul…
Evolutionary map of the universe (EMU): Observations of filamentary structures in the Abell S1136 galaxy cluster
Reiprich, Thomas H.; Koribalski, Bärbel S.; Norris, Ray P. +17 more
We present radio observations of the galaxy cluster Abell S1136 at 888 MHz, using the Australian Square Kilometre Array Pathfinder radio telescope, as part of the Evolutionary Map of the Universe Early Science program. We compare these findings with data from the Murchison Widefield Array, XMM-Newton, the Wide-field Infrared Survey Explorer, the D…
At the same age, metallicity, and alpha-enhancement, sodium is a more effective tracer of the young and old sequences of the Milky Way disc
Buder, Sven; Owusu, Evans Kojo; Ruiter, Ashley J. +2 more
Trends in elemental enrichment with stellar age can give us a powerful avenue to identify thus far unexplained origin sites of the elements. We investigate stellar abundance trends using the GALAH DR3 high-resolution spectroscopic dataset of 6 234 solar-type stars. Our study explores the elemental abundance [X/Fe] of sodium (Na) with stellar age. …