Search Publications
Constraining the formation of WASP-39b using JWST transit spectroscopy
Waters, L. B. F. M.; Min, M.; Khorshid, N. +1 more
Context. Understanding the formation history of planets is one of the goals of studying exoplanet atmospheres. The atmospheric composition of planets can provide insights into the formation pathways of planets. Even though the mapping of the atmospheric composition onto a formation pathway is not unambiguous, with the increasing sensitivity of mod…
Probing the physical properties of the intergalactic medium using SRG/eROSITA spectra from blazars
Wilms, J.; Gatuzz, E.; Hämmerich, S. +1 more
Most baryonic matter resides in the intergalactic medium (IGM). This diffuse gas is primarily composed of ionized hydrogen and helium and fills the space between galaxies. Observations of this environment are crucial for better understanding the physical processes in it. We present an analysis of the IGM absorption using blazar spectra from the fi…
A dynamic view of V Hydrae. Monitoring of a spectroscopic-binary AGB star with an alkaline jet
Jorissen, A.; Planquart, L.; Escorza, A. +2 more
Context. The well studied carbon star V Hydrae is known to exhibit a complex asymmetric environment made of a dense equatorial wind and high-velocity outflows, hinting at its transition from the AGB phase to the asymmetric planetary nebula phase. In addition, V Hydrae also exhibits a long secondary period of 17 yr in its light curve, suggesting th…
TOI-663: A newly discovered multi-planet system with three transiting mini-Neptunes orbiting an early M star
Tamura, M.; Bouchy, F.; de Medeiros, J. R. +53 more
We present the detection of three exoplanets orbiting the early M dwarf TOI-663 (TIC 54962195; V = 13.7 mag, J = 10.4 mag, R★ = 0.512 ± 0.015 R⊙, M★ = 0.514 ± 0.012 M⊙, d = 64 pc). TOI-663 b, c, and d, with respective radii of 2.27 ± 0.10 R⊕, 2.26 ± 0.10 R⊕, and 1.92 ± 0.13 R⊕<…
The S-PLUS Ultra-Short Survey: First data release
Beers, Timothy C.; Placco, Vinicius M.; Limberg, Guilherme +15 more
Context. This paper presents the first public data release of the S-PLUS Ultra-Short Survey (USS), a photometric survey with short exposure times, covering approximately 9300 deg2 of the Southern sky. The USS utilizes the Javalambre 12-band magnitude system, including narrow, medium, and broad-band filters targeting prominent stellar sp…
KASHz+SUPER: Evidence of cold molecular gas depletion in AGN hosts at cosmic noon
Alexander, D. M.; Cappi, M.; Feltre, A. +32 more
The energy released by active galactic nuclei (AGN) has the potential to heat or remove the gas of the ISM, thus likely impacting the cold molecular gas reservoir of host galaxies at first, with star formation following as a consequence on longer timescales. Previous works on high-z galaxies, which compared the gas content of those without identif…
Volume density maps of the 862 nm DIB carrier and interstellar dust. Hints on the role of carbon-rich ejecta from AGB stars
Lallement, R.; Cox, N. L. J.; Vergely, J. L.
Context. The carbonaceous macromolecules imprinting the numerous absorptions called diffuse interstellar bands (DIBs) in astronomical spectra are omnipresent in the Galaxy and beyond. They represent a considerable reservoir of organic matter. However, their chemical formulae, formation, and destruction sites remain unknown. Their spatial distribut…
The Pristine survey: XXIV. The Galactic underdogs: Dynamic tales of a Milky Way metal-poor population
Sestito, Federico; Martin, Nicolas F.; Kordopatis, Georges +12 more
Context. Metal-poor stars hold key information on the early Milky Way. Through the identification and characterisation of substructures, one can understand internal mechanisms (including merger and accretion events), which are indispensable to reconstruct the formation history of the Galaxy. Aims. To allow an investigation of a population of very …
Swarming in stellar streams: Unveiling the structure of the Jhelum stream with ant colony-inspired computation
Smith, R.; Balbinot, E.; Peletier, R. +8 more
The halo of the Milky Way galaxy hosts multiple dynamically coherent substructures known as stellar streams that are remnants of tidally disrupted orbiting systems such as globular clusters (GCs) and dwarf galaxies (DGs). A particular case is that of the Jhelum stream, which is known for its unusual and complex morphology. Using the available data…
Sausage, kink, and fluting magnetohydrodynamic wave modes identified in solar magnetic pores by Solar Orbiter/PHI
Woch, J.; Solanki, S. K.; Schou, J. +25 more
Solar pores are intense concentrations of magnetic flux that emerge through the solar photosphere. When compared to sunspots, they are much smaller in diameter and can therefore be affected and buffeted by neighbouring granular activity to generate significant magnetohydrodynamic (MHD) wave energy flux within their confines. However, observations …