Search Publications
SkyMapper Southern Survey: Data release 4
Wolf, Christian; Tonry, John L.; Onken, Christopher A. +5 more
We present the fourth data release (DR4) of the SkyMapper Southern Survey (SMSS), the last major step in our hemispheric survey with six optical filters: u, v, g, r, i, z. SMSS DR4 covers 26 000 deg
Probing the soft X-ray properties and multi-wavelength variability of SN2023ixf and its progenitor
Auchettl, Katie; Shappee, Benjamin J.; Beacom, John F. +3 more
We present a detailed analysis of nearly two decades of optical/UV and X-ray data to study the multi-wavelength pre-explosion properties and post-explosion X-ray properties of nearby SN2023ixf located in M101. We find no evidence of precursor activity in the optical to UV down to a luminosity of $\lesssim$ $1.0×105 \textrm{L}_{\odot}$ ,…
Evolutionary Map of the Universe (EMU): A pilot search for diffuse, non-thermal radio emission in galaxy clusters with the Australian SKA Pathfinder
Botteon, A.; Riseley, C. J.; Norris, R. P. +10 more
Clusters of galaxies have been found to host Mpc-scale diffuse, non-thermal radio emission in the form of central radio halos and peripheral relics. Turbulence and shock-related processes in the intra-cluster medium are generally considered responsible for the emission, though details of these processes are still not clear. The low surface brightn…
The Sydney Radio Star Catalogue: Properties of radio stars at megahertz to gigahertz frequencies
Stelzer, Beate; Das, Barnali; Pope, Benjamin J. S. +13 more
We present the Sydney Radio Star Catalogue, a new catalogue of stars detected at megahertz to gigahertz radio frequencies. It consists of 839 unique stars with 3 405 radio detections, more than doubling the previously known number of radio stars. We have included stars from large area searches for radio stars found using circular polarisation sear…
VaTEST III: Validation of eight potential super-earths from TESS data
Barclay, Thomas; Tan, Thiam-Guan; Schlieder, Joshua E. +39 more
NASA's all-sky survey mission, the Transiting Exoplanet Survey Satellite (TESS), is specifically engineered to detect exoplanets that transit bright stars. Thus far, TESS has successfully identified approximately 400 transiting exoplanets, in addition to roughly 6 000 candidate exoplanets pending confirmation. In this study, we present the results…
On the existence of `Maia variables'
Jayaraman, Rahul; Ozuyar, Dogus; Handler, Gerald +5 more
There are different classes of pulsating stars in the H-R diagram. While many of those classes are undisputed, some remain a mystery such as the objects historically called `Maia variables'. Whereas the presence of such a class was suggested seven decades ago, no pulsational driving mechanism is known that could excite short-period oscillations in…
Measuring the stellar and planetary parameters of the 51 Eridani system
Mann, Andrew W.; von Braun, Kaspar; Schaefer, Gail +3 more
In order to study exoplanets, a comprehensive characterisation of the fundamental properties of the host stars – such as angular diameter, temperature, luminosity, and age, is essential, as the formation and evolution of exoplanets are directly influenced by the host stars at various points in time. In this paper, we present interferometric observ…
Galaxy spin direction asymmetry in JWST deep fields
Shamir, Lior
The unprecedented imaging power of James Webb Space Telescope (JWST) provides new abilities to observe the shapes of objects in the early Universe in a way that has not been possible before. Recently, JWST acquired a deep field image inside the same field imaged in the past as the Hubble Space Telescope (HST) Ultra Deep Field. Computer-based quant…
4XMM J182531.5−144036: A new persistent Be/X-ray binary found within the XMM-Newton serendipitous survey
Farrell, S. A.; Gosling, A. J.; Clark, J. S. +2 more
We aim to investigate the nature of time-variable X-ray sources detected in the XMM-Newton serendipitous survey. The X-ray light curves of objects in the XMM-Newton serendipitous survey were searched for variability, and coincident serendipitous sources observed by Chandra were also investigated. Subsequent infrared spectroscopy of the counterpart…
First detection of X-ray pulsations and spectrum of the high Galactic latitude pulsar PSR J0837–2454 and direct Urca cooling implications
Deller, Adam T.; Ho, Wynn C. G.; Becker, Werner +2 more
PSR J0837