Search Publications
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…
MARSIS data as a new constraint for the orbit of Phobos
Orosei, R.; Lainey, V.; Cicchetti, A. +3 more
Context. The orbit of Phobos is currently known with a 1σ precision of 300 m, mostly directed along its track. Most previous determinations were made with the help of the Super-Resolution Channel (SRC) channel of the HRSC camera on board Mars Express (MEX). The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board MEX crosse…
Chemical abundances in nearby Sun-like stars and the history of the Milky Way disc
Gondoin, P.
Context. The properties of nearby stars bear the imprint of the formation and evolution of the Milky Way (MW). Reconstructing its history requires the determination of precise ages for large samples of stars over long periods. Aims. The present study aims to address the evolution of the MW disc in the region where the Sun and nearby Sun-like stars…
XMM-SERVS X-ray extended Galaxy Cluster (XVXGC) catalog
Jiang, Linhua; Luo, Bin; Erben, Thomas +4 more
Context. To explain the well-known tension between cosmological parameter constraints obtained from the primary cosmic microwave background (CMB) and those drawn from X-ray-selected galaxy cluster samples identified with early data, we propose a possible explanation for the incompleteness of detected clusters being higher than estimated. Specifica…
The morphology and kinematics of the galaxy group AM 1054-325: A MUSE perspective
Jadhav, Vikrant V.; Yadav, Jyoti
Galaxy interactions in groups can lead to intense starbursts and the activation of active galactic nuclei (AGNs). The stripped gas from the outer disk can lead to star-forming clumps along the tidal tails or sometimes tidal dwarf galaxies. We investigate the impact of interaction on various galaxy properties, including morphology, star formation r…
Digging deeper into the dense Galactic globular cluster Terzan 5 with electron-multiplying CCDs: Variable star detection and new discoveries
Snodgrass, C.; Horne, K.; Catelan, M. +20 more
Context. High frame-rate imaging was employed to mitigate the effects of atmospheric turbulence (seeing) in observations of globular cluster Terzan 5. Aims. High-precision time-series photometry with the highest angular resolution so far has been obtained for the crowded central region of Terzan 5. Observations were carried out using ground-based …
Synoptic maps from two viewpoints. Preparing for maps from SDO/HMI and SO/PHI data
Solanki, S. K.; Schou, J.; Valori, G. +2 more
Context. Over recent decades, various kinds of magnetic synoptic chart products have seen major improvements in observation cadence, resolution, and processing, but their creation is still limited by the 27.27 day rotation rate of the solar surface.
Aims: Co-observation from a second vantage point away from the Earth-Sun line with SO/PHI enab…
A machine learning approach to estimate mid-infrared fluxes from WISE data
Fonseca-Bonilla, Nuria; Cerdán, Luis; Noriega-Crespo, Alberto +1 more
Context. While the Wide-field Infrared Survey Explorer (WISE) is the largest, best quality infrared all-sky survey to date, a smaller coverage mission, Spitzer, was designed to have better sensitivity and spatial resolution at similar wavelengths. Confusion and contamination in WISE data result in discrepancies between them. Aims. We aim to presen…
HD 214220 (BD+56 2813): An eclipsing binary with its primary component at the end of the main sequence
Schmutz, W.
Context. Analysis of the light curves of an eclipsing binary allows one to derive the absolute dimensions of the system. This in turn yields information on the radii of the components, which allows the stars to be accurately placed on the Hertzsprung-Russell diagram and their evolutionary phase to be interpreted via comparisons to tracks of stella…