Search Publications
Link between brightest cluster galaxy properties and large scale extensions of 38 DAFT/FADA and CLASH clusters in the redshift range 0.2 < z < 0.9
Adami, C.; Durret, F.; Márquez, I. +2 more
Context. In the context of large-scale structure formation, clusters of galaxies are located at the nodes of the cosmic web, and continue to accrete galaxies and groups along filaments. In some cases, they show a very large extension and a preferential direction. Brightest cluster galaxies (BCGs) are believed to grow through the accretion of many …
First results from a large-scale proper motion study of the Galactic centre
Nogueras-Lara, F.; Gallego-Calvente, A. T.; Dong, H. +4 more
Proper motion studies of stars in the centre of the Milky Way have typically been limited to the Arches and Quintuplet clusters, and to the central parsec. Here we present the first results of a large-scale proper motion study of stars within several tens of parsecs of Sagittarius A* based on our 0.2″ angular resolution GALACTICNUCLEUS survey (epo…
A stellar census in globular clusters with MUSE: A spectral catalogue of emission-line sources
Weilbacher, Peter M.; Kollatschny, Wolfram; Kamann, Sebastian +6 more
Aims: Globular clusters produce many exotic stars due to a much higher frequency of dynamical interactions in their dense stellar environments. Some of these objects were observed together with several hundred thousand other stars in our MUSE survey of 26 Galactic globular clusters. Assuming that at least a few exotic stars have exotic spectr…
Two cold belts in the debris disk around the G-type star NZ Lupi
Avenhaus, H.; Augereau, J. -C.; Henning, T. +36 more
Context. Planetary systems hold the imprint of the formation and of the evolution of planets especially at young ages, and in particular at the stage when the gas has dissipated leaving mostly secondary dust grains. The dynamical perturbation of planets in the dust distribution can be revealed with high-contrast imaging in a variety of structures.…
Hybrid modeling of cometary plasma environments. II. Remote-sensing of a cometary bow shock
Kallio, E.; Nilsson, H.; Simon Wedlund, C. +3 more
Context. The ESA Rosetta probe has not seen direct evidence of a fully formed bow shock at comet 67P/Churyumov-Gerasimenko (67P). Ion spectrometer measurements of cometary pickup ions measured in the vicinity of the nucleus of 67P are available and may contain signatures of the large-scale plasma environment.
Aims: The aim is to investigate t…
To be or not to be: the case of the hot WHIM absorption in the blazar PKS 2155-304 sight line
Finoguenov, A.; Kaastra, J.; Bonamente, M. +8 more
The cosmological missing baryons at z < 1 most likely hide in the hot (T ≳ 105.5 K) phase of the warm hot intergalactic medium (WHIM). While the hot WHIM is hard to detect due to its high ionisation level, the warm (T ≲ 105.5 K) phase of the WHIM has been very robustly detected in the far-ultraviolet (FUV) band. We adopted…
The Fornax 3D project: dust mix and gas properties in the centre of early-type galaxy FCC 167
Viaene, S.; Morelli, L.; Pinna, F. +15 more
Galaxies continuously reprocess their interstellar material. We can therefore expect changing dust grain properties in galaxies that have followed different evolutionary pathways. Determining the intrinsic dust grain mix of a galaxy helps in reconstructing its evolutionary history. Early-type galaxies occasionally display regular dust lanes in the…
A closer look at the deep radio sky: Multi-component radio sources at 3 GHz VLA-COSMOS
Bondi, M.; Finoguenov, A.; Magnelli, B. +20 more
Context. Given the unprecedented depth achieved in current large radio surveys, we are starting to probe populations of radio sources that have not been studied in the past. However, identifying and categorising these objects, differing in size, shape and physical properties, is becoming a more difficult task.
Aims: In this data paper we pres…
Formation of cometary O2 ice and related ice species on grain surfaces in the midplane of the pre-solar nebula
Walsh, Catherine; Eistrup, Christian
Context. Detection of abundant O2 at 1-10% relative to H2O ice in the comae of comets 1P/Halley and 67P/Churyumov-Gerasimenko has motivated attempts to explain the origin of the high O2 ice abundance. Recent chemical modelling of the outer, colder regions of a protoplanetary disk midplane has shown production of O<…
Mid-infrared evolution of η Carinae from 1968 to 2018
Gull, T. R.; Hillier, D. J.; Asmus, D. +6 more
η Car is one of the most luminous and massive stars in our Galaxy and is the brightest mid-IR source in the sky outside our solar system. Since the late 1990s, the central source has dramatically brightened at UV and optical wavelengths. This might be explained by a decrease in circumstellar dust extinction. We aim to establish the mid-IR flux evo…