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A rare outburst from the stealthy BeXRB system Swift J0549.7-6812
Udalski, A.; Coe, M. J.; Kennea, J. A. +3 more
Swift J0549.7-6812 is a Be/X-ray binary system (BeXRB) in the Large Magellanic Cloud (LMC) exhibiting an ~6 s pulse period. Like many such systems, the variable X-ray emission is believed to be driven by the underlying behaviour of the mass donor Be star. In this paper, we report on X-ray observations of the brightest known outburst from this syst…
CS-ROMER: a novel compressed sensing framework for Faraday depth reconstruction
Scaife, Anna M. M.; Leahy, J. Patrick; Cárcamo, Miguel +1 more
The reconstruction of Faraday depth structure from incomplete spectral polarization radio measurements using the RM synthesis technique is an underconstrained problem requiring additional regularization. In this paper, we present cs-romer: a novel object-oriented compressed sensing framework to reconstruct Faraday depth signals from spectropolariz…
Survey for Distant Solar Twins (SDST) - III. Identification of new solar twin and solar analogue stars
Murphy, Michael T.; Liu, Fan; Flynn, Chris +3 more
The Survey for Distant Solar Twins aims to find stars very similar to the Sun at distances of 1-$4\, {\rm kpc}$, several times more distant than any currently known solar twins and analogues. The goal is to identify the best stars with which to test whether the fine-structure constant, α, varies with dark matter density in our Galaxy. Here, we use…
Chemical enrichment of ICM within the Ophiuchus cluster I: radial profiles
Fabian, A. C.; Pinto, C.; Eckert, D. +6 more
The analysis of the elemental abundances in galaxy clusters offers valuable insights into the formation and evolution of galaxies. In this study, we explore the chemical enrichment of the intracluster medium in the Ophiuchus cluster by utilizing XMM-Newton EPIC-pn observations. We explore the radial profiles of Si, S, Ar, Ca, and Fe. Due to the hi…
LeMMINGs. VI. Connecting nuclear activity to bulge properties of active and inactive galaxies: radio scaling relations and galaxy environment
Argo, M. K.; Knapen, J. H.; Williams, D. R. A. +13 more
Multiwavelength studies indicate that nuclear activity and bulge properties are closely related, but the details remain unclear. To study this further, we combine Hubble Space Telescope bulge structural and photometric properties with 1.5 GHz, e-MERLIN nuclear radio continuum data from the LeMMINGs survey for a large sample of 173 'active' galaxie…
A search for variable subdwarf B stars in TESS Full Frame Images III. An update on variable targets in both ecliptic hemispheres - contamination analysis and new sdB pulsators
Kilkenny, D.; Németh, P.; Sahoo, S. K. +2 more
We present an update on the variable star survey performed on the TESS 30 min Full Frame Image (FFI) data reported by our first two papers in this series. This update includes a contamination analysis in order to identify false positives and analysis of the TESS 10 min FFI data collected during Years 3 and 4 of the mission. We clarify the variabil…
The Pristine survey - XXI. Exploring the metal-poor boundary with ESPaDoNS
Sestito, Federico; Martin, Nicolas; Kordopatis, Georges +10 more
In this paper, we study high-resolution spectra of 19 stars that have metallicity estimates below -3.5 using at least two metallicity-sensitive photometric indices based on Pristine photometry. The purpose is to understand what kind of stars populate this parameter space, together with extremely metal-poor stars. This because we plan to extensivel…
Kepler's last planet discoveries: two new planets and one single-transit candidate from K2 campaign 19
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +9 more
The Kepler space telescope was responsible for the discovery of over 2700 confirmed exoplanets, more than half of the total number of exoplanets known today. These discoveries took place during both Kepler's primary mission, when it spent 4 yr staring at the same part of the sky, and its extended K2 mission, when a mechanical failure forced it to …
The DIVING3D Survey - Deep IFS View of Nuclei of Galaxies - III. Analysis of the nuclear region of the early-type galaxies of the sample
Ricci, T. V.; Steiner, J. E.; Menezes, R. B. +2 more
We analysed the nuclear region of all 56 early-type galaxies from the DIVING3D Project, which is a statistically complete sample of objects that contains all 170 galaxies in the Southern Hemisphere with B < 12.0 mag and galactic latitude |b| < 15°. Observations were performed with the Integral Field Unit of the Gemini Multi-Object…
Forming stars in a dual AGN host: molecular and ionized gas in the nearby, luminous infrared merger, Mrk 266
Robert, Carmelle; Rousseau-Nepton, Laurie; Heckman, Timothy +5 more
We present star formation rates based on cold and ionized gas measurements of Mrk 266 (NGC 5256), a system composed of two colliding gas-rich galaxies, each hosting an active galactic nucleus. Using 12CO (1-0) observations with the Combined Array for Research in Millimeter-Wave Astronomy (CARMA), we find a total H2 mass in th…