Search Publications
The CHEOPS view of the climate of WASP-3 b
Alonso, R.; Deleuil, M.; Erikson, A. +83 more
Context. Hot Jupiters are giant planets subject to intense stellar radiation. The physical and chemical properties of their atmosphere make them the most amenable targets for atmospheric characterization. Aims. In this paper we analyze the photometry collected during the secondary eclipses of the hot Jupiter WASP-3 b by CHEOPS, TESS, and Spitzer. …
Cosmological insights into the early accretion of r-process-enhanced stars: II. Dynamical identification of lost members of Reticulum II
Berczik, Peter; Mardini, Mohammad; Ishchenko, Maryna +1 more
Aims. We identify the possible dynamical connection between individual r-process-enhanced stars and the ultra-faint dwarf galaxy Reticulum II based on the current phase-space information for these stars and the dynamical mass-loss model of Reticulum II during its orbital motion for 11.5 Gyr of lookback time. The dynamical orbital modelling togethe…
CMEs evolve in the interplanetary medium to double their predicted geo-effectiveness
Poedts, Stefaan; Mishra, Wageesh; Soni, Shirsh Lata +4 more
Context. We explore the impact of interactions between coronal mass ejections (CMEs) - known as CME-CME interactions - on Earth using remote-sensing and in situ observations and estimate the amplification of the geo-effectiveness of the individual CMEs by a factor of ∼2 due to CME-CME interactions.
Aims: We present 3D reconstructions of inter…
The counter-rotating stellar core of NGC 4494
Morelli, L.; Corsini, E. M.; Pizzella, A. +2 more
Context. Kinematically decoupled cores (KDCs) are often found in the centers of early-type galaxies. Aims. We aim to investigate the kinematics, structure, and stellar populations of the KDC residing in the early-type galaxy NGC 4494 to understand its formation. Methods. We used long-slit spectroscopic data obtained with the FORS2 instrument on th…
Inferring the dust emission at submillimeter and millimeter wavelengths using neural networks
Ristorcelli, I.; Ysard, N.; Noriega-Crespo, A. +3 more
Context. The Planck mission provided all-sky dust emission maps in the submillimeter (submm) to millimeter (mm) range at an angular resolution of 5'. In addition, some specific sources can be observed at long wavelengths and higher resolution using ground-based telescopes. These observations are limited to small scales and are sometimes not delive…
Deriving physical parameters of unresolved star clusters. VIII. Limits of aperture photometry for star cluster studies
Stonkutė, Rima; Vansevičius, Vladas; Kriščiūnas, Eimantas +2 more
Context. Recently, it has been noticed that the discrepancies in the integrated colour indices (CIs) between star clusters and models are mostly due to the projection of bright stars in the apertures. In order to reduce this problem, the method of adaptive aperture photometry has been proposed. This method has been applied to star clusters from th…
SOFIA/upGREAT far-infrared spectroscopy of bright rimmed pillars in IC 1848
Wiesemeyer, Helmut; Güsten, Rolf; Seo, Youngmin +4 more
Using the upGREAT instrument on SOFIA, we imaged the [C II] 158 µm fine structure line emission in bright-rimmed pillars located at the southern edge of the IC 1848 H II region, and carried out pointed observations of the [O I] 63 and 145 µm fine structure lines toward selected positions. The observations are used to characterize the morphology, v…
CO outflows from young stars in the NGC2023 cluster
Güsten, R.; Mookerjea, B.; Sandell, G.
Context. Young early-type HAeBe stars are still embedded in the molecular clouds in which they formed. They illuminate reflection nebulae, which shape the surrounding molecular cloud and may trigger star formation. They are therefore ideal places to search for ongoing star formation activity.
Aims: NGC 2023 is illuminated by the Herbig Be sta…
Thermal and kinetic coronal rain diagnostics with Mg II h & k lines
Oliver, R.; Kriginsky, M.
Aims: The aim of this work is to assess the temperature and velocity diagnostics of coronal rain clumps, as observed in the lines formed in the upper chromosphere.
Methods: We performed the temperature diagnostics using inversions of data from nine spectroscopic observations obtained with the IRIS spectrograph in the Mg II h & k line…
Investigation of the nature of the wind interaction in HD 93205 based on multi-epoch X-ray observations
De Becker, Michaël; Arora, Bharti
Context. The study of the X-ray emission from massive binaries constitutes a relevant approach to investigate shock physics. The case of short period binaries may turn out to be quite challenging, especially in very asymmetric systems where the primary wind may overwhelm that of the secondary in the wind interaction. Aims. Our objective consists i…