Search Publications
Chemo-kinematics of the Milky Way spiral arms and bar resonances: Connection to ridges and moving groups in the solar vicinity
Gerhard, Ortwin; Khoperskov, Sergey
Making use of a new high-resolution spiral galaxy simulation as well as Gaia DR2 and EDR3 data complemented by chemical abundances from the Galah DR3, APOGEE DR16, and LAMOST DR5 surveys, we explore the possible link between the Milky Way (MW) spiral arms, (R, vϕ) ridges, and moving groups in local vR-vϕ space. We …
Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales
Di Gennaro, G.; Diego, J. M.; Rossetti, M. +29 more
Context. The Shapley Supercluster (⟨z⟩≈0.048) contains several tens of gravitationally bound clusters and groups, making it an ideal subject for radio studies of cluster mergers.
Aims: We used new high sensitivity radio observations to investigate the less energetic events of mass assembly in the Shapley Supercluster from supercluster down to…
Detecting clusters of galaxies and active galactic nuclei in an eROSITA all-sky survey digital twin
Salvato, M.; Nandra, K.; Merloni, A. +15 more
Context. The extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma (SRG) observatory is revolutionizing X-ray astronomy. The mission provides unprecedented samples of active galactic nuclei (AGN) and clusters of galaxies, with the potential of studying astrophysical properties of X-ray sources and …
LIDA: The Leiden Ice Database for Astrochemistry
van Dishoeck, E. F.; Rocha, W. R. M.; Rachid, M. G. +3 more
Context. High-quality vibrational spectra of solid-phase molecules in ice mixtures and for temperatures of astrophysical relevance are needed to interpret infrared observations toward protostars and background stars. Such data are collected worldwide by several laboratory groups in support of existing and upcoming astronomical observations. Over t…
The MUSE eXtremely deep field: first panoramic view of an Mg II emitting intragroup medium
Bacon, Roland; Garel, Thibault; Brinchmann, Jarle +21 more
Using the exquisite data from the MUSE eXtremely Deep Field (MXDF), we report the discovery of an Mg II emission nebula with an area above a 2σ significance level of 1000 proper kpc2. This provides the first panoramic view of the spatial distribution of magnesium in the intragroup medium of a low-mass group of five star-forming galaxies…
Equivalent widths of Lyman α emitters in MUSE-Wide and MUSE-Deep
Richard, J.; Verhamme, A.; Nanayakkara, T. +15 more
Context. The hydrogen Lyman α line is often the only measurable feature in optical spectra of high-redshift galaxies. Its shape and strength are influenced by radiative transfer processes and the properties of the underlying stellar population. High equivalent widths of several hundred Å are especially hard to explain by models and could point tow…
A detailed analysis of the Gl 486 planetary system
Amado, P. J.; Caballero, J. A.; Pallé, E. +64 more
Context. The Gl 486 system consists of a very nearby, relatively bright, weakly active M3.5 V star at just 8 pc with a warm transiting rocky planet of about 1.3 R⊕ and 3.0 M⊕. It is ideal for both transmission and emission spectroscopy and for testing interior models of telluric planets.
Aims: To prepare for future studi…
Understanding star formation in molecular clouds. IV. Column density PDFs from quiescent to massive molecular clouds
André, Ph.; Arzoumanian, D.; Könyves, V. +26 more
Probability distribution functions of the total hydrogen column density (N-PDFs) are a valuable tool for distinguishing between the various processes (turbulence, gravity, radiative feedback, magnetic fields) governing the morphological and dynamical structure of the interstellar medium. We present N-PDFs of 29 Galactic regions obtained from Hersc…
The 700 ks Chandra Spiderweb Field. I. Evidence for widespread nuclear activity in the protocluster
Pannella, M.; Fiore, F.; Pentericci, L. +21 more
Aims: We present an analysis of the 700 ks Chandra ACIS-S observation of the field around the radio galaxy J1140-2629 (the Spiderweb Galaxy) at z = 2.156, focusing on the nuclear activity in the associated large-scale environment.
Methods: We identified unresolved X-ray sources in the field down to flux limits of 1.3 × 10−16 a…
Assessment of [Fe/H] determinations for FGK stars in spectroscopic surveys
Casamiquela, L.; Soubiran, C.; Brouillet, N.
Context. The iron abundance [Fe/H] in the atmosphere of FGK-type stars is crucial in stellar and galactic physics. The number of stars with a measured value of [Fe/H] is increasing considerably thanks to spectroscopic surveys. However, different methodologies, inputs, and assumptions used in spectral analyses lead to different precisions in [Fe/H]…