Search Publications
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Henning, Thomas; Güdel, Manuel; Colina, Luis +26 more
Context. Mid-infrared imaging of exoplanets and disks is now possible with the coronographs of the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST). This wavelength range unveils new features of young directly imaged systems and allows us to obtain new constraints for characterizing the atmosphere of young giant exoplanets a…
Evidence for flare-accelerated particles in large scale loops in the behind-the-limb gamma-ray solar flare of September 29, 2022
Monstein, Christian; Krucker, Säm; Veronig, Astrid M. +4 more
We report on the detection of the gamma-ray emission above 100 MeV from the solar flare of September 29, 2022, by Fermi LAT with simultaneous coverage in HXR by Solar Orbiter STIX. The Solar Orbiter-Earth separation was 178° at the time of the flare as seen from Earth, with Solar Orbiter observing the east limb. Based on STIX imaging, the flare wa…
Benchmarking the effective temperature scale of red giant branch stellar models: The case of the metal-poor halo giant HD 122563
Salaris, M.; Creevey, O. L.; Thévenin, F. +2 more
Context. There is plenty of evidence in the literature of significant discrepancies between the observations and models of metal-poor red giant branch stars, in particular regarding the effective temperature Teff scale. Aims. We revisit the benchmark star HD 122563 using the most recent observations from Gaia Data Release 3, to investig…
Abundances of trace constituents in Jupiter's atmosphere inferred from Herschel/PACS observations
Villanueva, G. L.; Hartogh, P.; Lellouch, E. +4 more
Context. On October 31, 2009, the Photodetector Array Camera and Spectrometer (PACS) on board the Herschel Space Observatory observed far-infrared spectra of Jupiter in the wavelength range between 50 and 220 µm as part of the program "Water and Related Chemistry in the Solar System". The spectra have an effective spectral resolution between 900 a…
Mid-infrared evidence for iron-rich dust in the multi-ringed inner disk of HD 144432
Waters, L. B. F. M.; Woitke, P.; Augereau, J. -C. +40 more
Context. Rocky planets form by the concentration of solid particles in the inner few au regions of planet-forming disks. Their chemical composition reflects the materials in the disk available in the solid phase at the time the planets were forming. Studying the dust before it gets incorporated in planets provides a valuable diagnostic for the mat…
Exoplanets across galactic stellar populations with PLATO: Estimating exoplanet yields around FGK stars for the thin disk, thick disk, and stellar halo
Dayal, P.; Boettner, C.; Viswanathan, A.
Context. The vast majority of exoplanet discoveries to date have occurred around stars in the solar neighbourhood, with chemical compositions comparable to that of the Sun. However, models suggest that planetary systems in different Galactic environments, with varying dynamical histories and chemical abundances, may exhibit distinct characteristic…
An investigation into Venusian atmospheric chemistry based on an open-access photochemistry-transport model at 0–112 km
Sheng, Zheng; Dai, Longkang; Shao, Wencheng
Atmospheric chemistry plays a crucial role in the evolution of climate habitability on Venus. It has been widely explored by chemistry-transport models, but some characteristics are still poorly interpreted. This study is devoted to developing an open-access chemistry-transport model spanning both the middle and lower atmospheres of Venus. It prov…
The GAPS Programme at TNG: LXI. Atmospheric parameters and elemental abundances of TESS young exoplanet host stars
Baratella, M.; Scandariato, G.; Sozzetti, A. +26 more
Context. The study of exoplanets at different evolutionary stages can shed light on their formation, migration, and evolution. The determination of exoplanet properties depends on the properties of their host stars. It is therefore important to characterise the host stars for accurate knowledge on their planets. Aims. Our final goal is to derive, …
Molecular cloud matching in CO and dust in M33: I. High-resolution hydrogen column density maps from Herschel
Bigiel, Frank; Ossenkopf-Okada, Volker; Riechers, Dominik +7 more
This study is aimed to contribute to a more comprehensive understanding of the molecular hydrogen distribution in the galaxy M33 by introducing novel methods for generating high angular resolution (18.2″, equivalent to 75 pc for a distance of 847 kpc) column density maps of molecular hydrogen (NH2). M33 is a local group galax…
UOCS. XIV. Uncovering extremely low-mass white dwarfs and blue lurkers in NGC 752
Jadhav, Vikrant V.; Subramaniam, Annapurni; Sagar, Ram
Context. Evolutionary pathways of binary systems are vastly different from single stellar evolution, and thus there is a need to quantify their frequency and diversity. Thanks to their to their coeval nature, open clusters are the best test beds for unveiling the secrets of binary populations. The availability of multi-wavelength data in recent ye…