Search Publications
The merging galaxy cluster Abell 3266 at low radio frequencies
Bartalucci, I.; Riseley, C. J.; Johnston-Hollitt, M. +2 more
We present new low-frequency (ν = 88-216 MHz) observations of the complex merging galaxy cluster Abell 3266. These new observations are taken with the Murchison Widefield Array (MWA) in its Phase II 'extended', long-baseline configuration, offering the highest resolution low-frequency view of the cluster to date. We report on the detection of four…
Orion Bar as a window to the evolution of PAHs
Kirsanova, Maria S.; Boley, Paul A.; Murga, Maria S. +1 more
We investigate the mid-infrared (IR) emission in the Orion Bar photodissociation region (PDR), using archival photometric and spectroscopic observations from the United Kingdom Infrared Telescope (UKIRT), Spitzer, Infrared Space Observatory(ISO), and Stratospheric Observatory for Infrared Astronomy (SOFIA) telescopes. Specifically, we consider flu…
Physics of ULIRGs with MUSE and ALMA: The PUMA project. III. Incidence and properties of ionised gas disks in ULIRGs, associated velocity dispersion, and its dependence on starburstiness
Maiolino, R.; Colina, L.; Perna, M. +11 more
Context. A classical scenario suggests that ultra-luminous infrared galaxies (ULIRGs) transform colliding spiral galaxies into a spheroid-dominated early-type galaxy. Recent high-resolution simulations have instead shown that, under some circumstances, rotation disks can be preserved during the merging process or rapidly regrown after coalescence.…
The Basal Detectability of an Ice-Covered Mars by MARSIS
Mouginot, J.; Kofman, W.; Hérique, A. +2 more
The detection of anomalously strong relative basal reflectivity beneath the Martian South Polar Layered Deposits (SPLD) from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) has led to hypotheses suggesting the presence of basal materials such as liquid water. Here, we propose a forward approach to assess whether such a high…
Probing the physicochemical properties of the Leo Ring and the Leo I group
Richter, Philipp; Charlton, Jane C.; Kacprzak, Glenn G. +6 more
We present an absorption line study of the physical and chemical properties of the Leo H I Ring and the Leo I Group as traced by 11 quasar sightlines spread over a ≈600 × 800 kpc2 region. Using HST/COS G130/G160 archival observations as constraints, we couple cloud-by-cloud, multiphase, Bayesian ionization modelling with galaxy property…
An Open-source Bayesian Atmospheric Radiative Transfer (BART) Code. III. Initialization, Atmospheric Profile Generator, Post-processing Routines
Cubillos, Patricio E.; Blecic, Jasmina; Challener, Ryan C. +12 more
This and companion papers by Harrington et al. and Cubillos et al. describe an open-source retrieval framework, Bayesian Atmospheric Radiative Transfer (BART), available to the community under the reproducible-research license via https://github.com/exosports/BART. BART is a radiative transfer code (transit; https://github.com/exosports/transit; R…
Deep XMM-Newton Observations of an X-ray Weak Broad Absorption Line Quasar at z = 6.5
Fan, Xiaohui; Keeton, Charles R.; Walter, Fabian +14 more
We report X-ray observations of the most distant known gravitationally lensed quasar, J0439+1634 at z = 6.52, which is also a broad absorption line (BAL) quasar, using the XMM-Newton Observatory. With a 130 ks exposure, the quasar is significantly detected as a point source at the optical position with a total of ${358}_{-19}^{+19}$ net counts usi…
The "Singular" Behavior of the Solar Wind Scaling Features during Parker Solar Probe-BepiColombo Radial Alignment
Richter, Ingo; Auster, Hans-Ulrich; Hadid, Lina Z. +4 more
At the end of 2020 September, the Parker Solar Probe (PSP) and BepiColombo were radially aligned: PSP was orbiting near 0.17 au and BepiColombo near 0.6 au. This geometry is of particular interest for investigating the evolution of solar wind properties at different heliocentric distances by observing the same solar wind plasma parcels. In this wo…
The Initial-Final Mass Relation of White Dwarfs: A Tool to Calibrate the Third Dredge-Up
Marigo, Paola
The initial mass-final mass relationship (IFMR) of white dwarfs (WD) represents a crucial benchmark for stellar evolution models, especially for the efficiency of mixing episodes and mass loss during the asymptotic giant branch (AGB) phase. In this study, we argue that this relation offers the opportunity to constrain the third dredge-up (3DU), wi…
The magnetic field and magnetosphere of Plaskett's star: a fundamental shift in our understanding of the system
Wade, G. A.; Neiner, C.; Alecian, E. +7 more
Plaskett's 'star' appears to be one of a small number of short-period binary systems known to contain a hot, massive, magnetic star. We combine an extensive spectropolarimetric (Stokes V) data set with archival photometry and spectropolarimetry to establish the essential characteristics of the magnetic field and magnetosphere of the rapidly rotati…