Search Publications
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…
H.E.S.S. and Suzaku observations of the Vela X pulsar wind nebula
Santangelo, A.; Quirrenbach, A.; Bregeon, J. +222 more
Context. Pulsar wind nebulae (PWNe) represent the most prominent population of Galactic very-high-energy gamma-ray sources and are thought to be an efficient source of leptonic cosmic rays. Vela X is a nearby middle-aged PWN, which shows bright X-ray and TeV gamma-ray emission towards an elongated structure called the cocoon.
Aims: Since TeV …
First detections of H13CO+ and HC15N in the disk around HD 97048. Evidence for a cold gas reservoir in the outer disk
Booth, Alice S.; Ilee, John D.; Walsh, Catherine
Observations of different molecular lines in protoplanetary disks provide valuable information on the gas kinematics, as well as constraints on the radial density and temperature structure of the gas. With ALMA we have detected H13CO+ (J = 4-3) and HC15N (J = 4-3) in the HD 97048 protoplanetary disk for the first t…
The HADES RV programme with HARPS-N at TNG. XI. GJ 685 b: a warm super-Earth around an active M dwarf
Rebolo, R.; Ribas, I.; Scandariato, G. +23 more
Context. Small rocky planets seem to be very abundant around low-mass M-type stars. Their actual planetary population is however not yet precisely understood. Currently, several surveys aim to expand the statistics with intensive detection campaigns, both photometric and spectroscopic.
Aims: The HADES program aims to improve the current stati…
Discovery of kilogauss magnetic fields on the nearby white dwarfs WD 1105-340 and WD 2150+591
Bagnulo, S.; Landstreet, J. D.
Magnetic fields are present in roughly 10% of white dwarfs. These fields affect the structure and evolution of such stars, and may provide clues about their earlier evolution history. Particularly important for statistical studies is the collection of high-precision spectropolarimetric observations of (1) complete magnitude-limited samples and (2)…