Search Publications
Disruption of a massive molecular cloud by a supernova in the Galactic Centre: Initial results from the ACES project
Immer, K.; Klessen, R. S.; Wang, Q. D. +33 more
The Milky Way's Central Molecular Zone (CMZ) differs dramatically from our local solar neighbourhood, both in the extreme interstellar medium conditions it exhibits (e.g. high gas, stellar, and feedback density) and in the strong dynamics at play (e.g. due to shear and gas influx along the bar). Consequently, it is likely that there are large-scal…
PEWDD: A database of white dwarfs enriched by exo-planetary material
Gänsicke, B. T.; Cunningham, T.; Izquierdo, P. +4 more
We present the Planetary Enriched White Dwarf Database (PEWDD), a collection of published photospheric abundances of white dwarfs accreting planetary debris alongside additional information relevant to metal-enrichment and the presence of infrared excesses, emission lines, and binary companions. At the time of publishing, PEWDD contains informatio…
On Its Way to the Neutron Star–White Dwarf Binary Graveyard, IGR J16194‑2810, A First Ascent M Giant X-Ray Binary
Fekel, Francis C.; Hinkle, Kenneth H.; Straniero, Oscar +5 more
A single-lined spectroscopic orbit for the M giant in the X-ray binary IGR J16194‑2810 is determined from a time series of optical spectra. The spectroscopic orbital period of 192.5 days is twice that of the photometric period, confirming that the M giant in the system is an ellipsoidal variable. The giant is identified as a first ascent giant app…
JWST Reveals CO Ice, Concentrated CO2 Deposits, and Evidence for Carbonates Potentially Sourced from Ariel's Interior
Hedman, Matthew M.; Grundy, William M.; Villanueva, Geronimo L. +21 more
The Uranian moon Ariel exhibits a diversity of geologically young landforms, with a surface composition rich in CO2 ice. The origin of CO2 and other species, however, remains uncertain. We report observations of Ariel's leading and trailing hemispheres, collected with NIRSpec (2.87–5.10 µm) on the James Webb Space Teles…
Mapping the core of the Tarantula Nebula with VLT-MUSE - III. A template for metal-poor starburst regions in the visual and far-ultraviolet
Castro, N.; Crowther, Paul A.
We present the integrated VLT-MUSE spectrum of the central 2 × 2 arcmin2 (30 × 30 pc2) of NGC 2070, the dominant giant H II region of the Tarantula Nebula in the Large Magellanic Cloud, together with an empirical far-ultraviolet spectrum constructed via LMC template stars from the ULLYSES survey and Hubble Tarantula Treasury …
Combining Gaia and GRAVITY: Characterising five new directly detected substellar companions
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +97 more
Precise mass constraints are vital for the characterisation of brown dwarfs and exoplanets. Here we present how the combination of data obtained by Gaia and GRAVITY can help enlarge the sample of substellar companions with measured dynamical masses. We show how the Non-Single-Star (NSS) two-body orbit catalogue contained in Gaia DR3 can be used to…
Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b
Alonso, R.; Deleuil, M.; Erikson, A. +79 more
Context. WASP-76 b has been a recurrent subject of study since the detection of a signature in high-resolution transit spectroscopy data indicating an asymmetry between the two limbs of the planet. The existence of this asymmetric signature has been confirmed by multiple studies, but its physical origin is still under debate. In addition, it contr…
Are lithium-rich giants binaries? A radial velocity variability analysis of 1400 giants
Aguilera-Gómez, Claudia; Chanamé, Julio; Castro-Tapia, Matias
Context. The existence of low-mass giants with large amounts of lithium (Li) in their surfaces has challenged stellar evolution for decades. One of the possibilities usually discussed in the literature to explain these Li-rich giants involves the interaction with a close binary companion, a scenario that predicts that, when compared against their …
Toward a Self-consistent Evaluation of Gas Dwarf Scenarios for Temperate Sub-Neptunes
Madhusudhan, Nikku; Constantinou, Savvas; Moses, Julianne I. +6 more
The recent JWST detections of carbon-bearing molecules in a habitable-zone sub-Neptune have opened a new era in the study of low-mass exoplanets. The sub-Neptune regime spans a wide diversity of planetary interiors and atmospheres not witnessed in the solar system, including mini-Neptunes, super-Earths, and water worlds. Recent works have investig…
Effects of galaxy environment on merger fraction
White, G. J.; Małek, K.; Serjeant, S. +13 more
Aims: In this work we examine how environment influences the merger fraction, from the low density field environment to higher density groups and clusters. We also study how the properties of a group or cluster, as well as the position of a galaxy in the group or cluster, influences the merger fraction.
Methods: We identified galaxy grou…