Search Publications
The planetary system around HD 190622 (TOI-1054). Measuring the gas content of low-mass planets orbiting F-stars
Alonso, R.; Deleuil, M.; Erikson, A. +107 more
Context. Giant planets are known to dominate the long-term stability of planetary systems due to their prevailing gravitational interactions, but they are also thought to play an important role in planet formation. Observational constraints improve our understanding of planetary formation processes such as the delivery of volatile-rich planetesima…
Statistical study of extreme-ultraviolet nanoflares in the quiet-Sun transition region
Fludra, A.
Aims: We carried out a large statistical study of ubiquitous small-scale extreme-ultraviolet (EUV) brightenings in the nanoflare energy range in the quiet-Sun transition region to derive their properties, estimate their contribution to the heating of the solar atmosphere, and compare their numbers to the coronal events published in the litera…
Uncovering the MIR emission of quiescent galaxies with JWST
Gómez-Guijarro, C.; Magdis, G. E.; Rigopoulou, D. +15 more
We present a study of the mid-IR (MIR) emission of quiescent galaxies (QGs) beyond the local universe. Using deep JWST imaging in the SMACS-0723 cluster field we identify a mass-limited (M* > 109 M⊙) sample of intermediate redshift QGs (0.2 < z < 0.7) and perform modelling of their rest-frame UV to MIR pho…
The first scattered light images of HD 112810, a faint debris disk in the Sco-Cen association
Pinte, C.; Ménard, F.; Augereau, J. -C. +17 more
Context. Circumstellar debris disks provide insight into the formation and early evolution of planetary systems. Resolved belts in particular help to locate planetesimals in exosystems, and can hint at the presence of disk-sculpting exoplanets.
Aims: We study the circumstellar environment of HD 112810 (HIP 63439), a mid-F-type star in the Sco…
Multi-instrument analysis of 67P/Churyumov-Gerasimenko coma particles: COPS-GIADA data fusion
Altwegg, K.; Rubin, M.; Hänni, N. +6 more
Context. The European Space Agency's Rosetta mission to comet 67P/Churyumov-Gerasimenko has offered scientists the opportunity to study a comet in unprecedented detail. Four instruments of the Rosetta orbiter, namely, the Micro-Imaging Dust Analysis System (MIDAS), the Grain Impact Analyzer and Dust Accumulator (GIADA), the COmetary Secondary Ion …
Analysis of the first coronagraphic multi-band observations of a sungrazing comet
Heinzel, P.; Sasso, C.; Romoli, M. +35 more
Context. Between 24 and 25 December 2021 a sungrazing comet (SOHO-4341) approached the Sun, being observed by "classical" visible light (VL) coronagraphs on board the SOHO and STEREO missions, and also by the innovative Metis coronagraph on board the ESA-NASA Solar Orbiter mission in the VL and ultraviolet (UV H I Lyman-α) band.
Aims: We show…
Combination of MRO SHARAD and deep-learning-based DTM to search for subsurface features in Oxia Planum, Mars
Tao, Yu; Muller, Jan-Peter; Xiong, Siting +3 more
Context. Oxia Planum is a mid-latitude region on Mars that attracts a great amount of interest worldwide. An orbiting radar provides an effective way to probe the Martian subsurface and detect buried layers or geomorphological features. The Shallow radar orbital radar system on board the NASA Mars reconnaissance orbiter transmits pulsed signals to…
Investigation into the reflection properties of the neutron star low-mass X-ray binary 4U 1636-53
Wang, H. G.; García, F.; Zhang, G. B. +1 more
We present the spectroscopy of the neutron star low-mass X-ray binary 4U 1636-53 using six simultaneous XMM-Newton and Rossi X-ray Timing Explorer observations. We applied different self-consistent reflection models to explore the features when the disk is illuminated by either the corona or the neutron star surface. We found that the spectra coul…
Infrared view of the multiphase ISM in NGC 253. II. Modelling the ionised and neutral atomic gas
Lebouteiller, Vianney; Ramambason, Lise; Madden, Suzanne C. +9 more
Context. Multi-wavelength studies of galaxies and galactic nuclei allow us to build a relatively more complete picture of the interstellar medium (ISM), especially in the dusty regions of starburst galaxies. An understanding of the physical processes in nearby galaxies can assist in the study of more distant sources at higher redshifts that cannot…
Far-infrared line emission from the outer Galaxy cluster Gy 3-7 with SOFIA/FIFI-LS: Physical conditions and UV fields
König, C.; Menten, K. M.; Karska, A. +13 more
Context. Far-infrared (FIR) line emission provides key information about the gas cooling and heating due to shocks and UV radiation associated with the early stages of star formation. Gas cooling via FIR lines might, however, depend on metallicity.
Aims: We aim to quantify the FIR line emission and determine the spatial distribution of the CO…