Search Publications
The XUV-driven escape of the planets around TOI-431 and ν2 Lupi
Fernández Fernández, Jorge; Wheatley, Peter J.; Osborn, Ares +4 more
One of the leading mechanisms invoked to explain the existence of the radius valley is atmospheric mass-loss driven by X-ray and extreme-ultraviolet irradiation, with this process stripping the primordial envelopes of young, small planets to produce the observed bimodal distribution. We present an investigation into the TOI-431 and ν2 L…
Cliff collapse on Comet 67P/Churyumov-Gerasimenko - II. Imhotep and Hathor
Davidsson, Björn J. R.
Cliff collapses on Comet 67P/Churyumov-Gerasimenko expose relatively pristine nucleus matter and offer rare opportunities to characterize ice-rich comet material. Here, Microwave Instrument for Rosetta Orbiter (MIRO) observations of two collapsed or crumbling cliffs in the Imhotep and Hathor regions have been assembled. The empirical diurnal anten…
The Physalis system: discovery of ORC-like radio shells around a massive pair of interacting early-type galaxies with offset X-ray emission
Koribalski, Bärbel S.; Khabibullin, Ildar; Dolag, Klaus +7 more
We present the discovery of large radio shells around a massive pair of interacting galaxies and extended diffuse X-ray emission within the shells. The radio data were obtained with the Australian Square Kilometre Array Pathfinder (ASKAP) in two frequency bands centred at 944 MHz and 1.4 GHz, respectively, while the X-ray data are from the XMM-New…
Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at z = 2-4 using JWST
Tagliaferri, G.; Salvaterra, R.; D'Elia, V. +34 more
Much of what is known of the chemical composition of the universe is based on emission line spectra from star-forming galaxies. Emission-based inferences are, nevertheless, model-dependent and they are dominated by light from luminous star-forming regions. An alternative and sensitive probe of the metallicity of galaxies is through absorption line…
Discovery of a one-sided radio filament of PSR J0538+2817 in S147: escape of relativistic PWN leptons into surrounding supernova remnant?
Churazov, E. M.; Khabibullin, I. I.; Bykov, A. M. +2 more
We report the discovery of a faint radio filament near PSR J0538+2817 in the NVSS, CGPS, and the Rapid ASKAP Continuum Survey data. This pulsar is plausibly associated with the supernova that gave rise to the Spaghetti nebula (Simeis 147). The structure is one-sided and appears to be almost aligned (within 17 degrees) with the direction of the pul…
The influence of black holes on the binary population of the globular cluster Palomar 5
Pang, Xiaoying; Wang, Long; Li, Chengyuan +3 more
The discovery of stellar-mass black holes (BHs) in globular clusters (GCs) raises the possibility of long-term retention of BHs within GCs. These BHs influence various astrophysical processes, including merger-driven gravitational waves and the formation of X-ray binaries. They also impact cluster dynamics by heating and creating low-density cores…
Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
Swain, Mark R.; Estrela, Raissa; Roudier, Gael M. +1 more
The challenge of inconsistent results from different data pipelines, even when starting from identical data, is a recognized concern in exoplanetary science. As we transition into the JWST era and prepare for the ARIEL space mission, addressing this issue becomes paramount because of its implications on our understanding of exoplanets. Although co…
Testing the near-far connection with FIRE simulations: inferring the stellar mass function of the proto-Local Group at z > 6 using the fossil record of present-day galaxies
Faucher-Giguère, Claude-André; Weisz, Daniel R.; Savino, Alessandro +6 more
The shape of the low-mass (faint) end of the galaxy stellar mass function (SMF) or ultraviolet luminosity function (UVLF) at $z \gtrsim 6$ is an open question for understanding which galaxies primarily drove cosmic reionization. Resolved photometry of Local Group low-mass galaxies allows us to reconstruct their star formation histories, stellar ma…
The variable stars in the field of the bulge cluster NGC 6558
Arellano Ferro, A.; Bustos Fierro, I. H.; Prudil, Z. +3 more
We made a survey of the variable stars in a 13.2 × 13.2 arcmin$^{2}$ centred on the field of the Galactic bulge cluster NGC 6558. A total of 78 variables were found in the field of the cluster. Many of these variables are included in the catalogue of variable stars in Galactic globular clusters (Clement et al. 2001), OGLE or Gaia DR3 data releases…
A disc wind origin for the optical spectra of dwarf novae in outburst
Long, Knox S.; Tampo, Yusuke; Knigge, Christian +2 more
Many high-state cataclysmic variables (CVs) exhibit blue-shifted absorption features in their ultraviolet (UV) spectra - a smoking-gun signature of outflows. However, the impact of these outflows on optical spectra remains much more uncertain. During its recent outburst, the eclipsing dwarf nova V455 And displayed strong optical emission lines who…