Search Publications
El Gordo needs El Anzuelo: Probing the structure of cluster members with multi-band extended arcs in JWST data
Caminha, G. B.; Suyu, S. H.; Galan, A. +2 more
Gravitational lensing by galaxy clusters involves hundreds of galaxies over a large redshift range and increases the likelihood of rare phenomena (supernovae, microlensing, dark substructures, etc.). Characterizing the mass and light distributions of foreground and background objects often requires a combination of high-resolution data and advance…
SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first five surveys
Sunyaev, R.; Krivonos, R.; Sazonov, S. +27 more
We present an updated catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope aboard the Spektrum-Roentgen-Gamma (SRG) observatory during its all-sky survey. It is based on the data of the first four and the partially completed fifth scans of the sky (ARTSS1-5). The catalog comprises 1545 sources detected in the 4-12 keV energy band.…
Identification of new nearby white dwarfs using Gaia DR3
Reffert, Sabine; Golovin, Alex; Vani, Akash +3 more
Context. A volume-complete sample of white dwarfs is essential for statistical studies of the white dwarf population. The sample of nearby white dwarfs is the only one that allows the faint end of the luminosity function to be probed and thus is the only one that covers the entire range of white dwarf ages. However, due to their intrinsic faintnes…
The IACOB project. XI. No increase in mass-loss rates over the bistability region
Simón-Díaz, S.; Urbaneja, M. A.; de Burgos, A. +1 more
The properties of blue supergiants are key for constraining the end of the main sequence (MS) of massive stars. Whether the observed drop in the relative number of fast-rotating stars below ≈21 kK is due to enhanced mass-loss rates at the location of the bistability jump, or the result of the end of the MS is still debated. Here, we combine newly …
TOI-4438 b: a transiting mini-Neptune amenable to atmospheric characterization
Nagel, E.; Amado, P. J.; Caballero, J. A. +47 more
We report the confirmation and mass determination of a mini-Neptune transiting the M3.5 V star TOI-4438 (G 182-34) every 7.44 days. A transit signal was detected with NASA's TESS space mission in the sectors 40, 52, and 53. In order to validate the planet TOI-4438 b and to determine the system properties, we combined TESS data with high-precision …
OGLE-2023-BLG-0836L: The sixth microlensing planet in a binary stellar system
Han, Cheongho; Udalski, Andrzej; Lee, Chung-Uk +32 more
Aims: Light curves of microlensing events occasionally deviate from the smooth and symmetric form of a single-lens single-source event. While most of these anomalous events can be accounted for by employing a binary-lens single-source (2L 1S) or a single-lens binary-source (1L2S) framework, it is established that a small fraction of events re…
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…
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…