Search Publications
Fragmentation in the massive G31.41+0.31 protocluster
Maud, L. T.; Csengeri, T.; Beuther, H. +18 more
Context. ALMA observations at 1.4 mm and ~0."2 (~750 au) angular resolution of the Main core in the high-mass star-forming region G31.41+0.31 have revealed a puzzling scenario. On the one hand, the continuum emission looks very homogeneous and the core appears to undergo solid-body rotation, suggesting a monolithic core stabilized by the magnetic …
ORion Alma New GEneration Survey (ORANGES). I. Dust continuum and free-free emission of OMC-2/3 filament protostars
Ceccarelli, C.; Yang, Y. -L.; López-Sepulcre, A. +3 more
Context. The spectral energy distribution (SED) in the millimetre to centimetre range is an extremely useful tool for characterising the dust in protostellar envelopes as well as free-free emission from the protostar and outflow. Actually, the evolutionary status of solar-type protostars is often based on their SED in the near-infrared to millimet…
The nature of hyperluminous infrared galaxies
Małek, K.; Wang, L.; Farrah, D. +7 more
Context. Hyperluminous infrared galaxies (HLIRGs) are shown to have been more abundant in early epochs. The small samples used in earlier studies are not sufficient to draw robust statistical conclusions regarding the physical properties and the power sources of these extreme infrared (IR) bright galaxies.
Aims: We make use of multi-wavelengt…
Abell 1430: A merging cluster with exceptional diffuse radio emission
Brunetti, G.; Rossetti, M.; Shimwell, T. W. +16 more
Context. Diffuse radio emission has been found in many galaxy clusters, predominantly in massive systems which are in the state of merging. The radio emission can usually be classified as relic or halo emission, which are believed to be related to merger shocks or volume-filling turbulence, respectively. Recent observations have revealed radio bri…
ATOMIUM: The astounding complexity of the near circumstellar environment of the M-type AGB star R Hydrae. I. Morpho-kinematical interpretation of CO and SiO emission
Kervella, Pierre; Decin, Leen; Montargès, Miguel +36 more
Evolved low- to intermediate-mass stars are known to shed their gaseous envelope into a large, dusty, molecule-rich circumstellar nebula which typically develops a high degree of structural complexity. Most of the large-scale, spatially correlated structures in the nebula are thought to originate from the interaction of the stellar wind with a com…
Dust observations from Parker Solar Probe: dust ejection from the inner Solar System
Czechowski, A.; Mann, I.
Context. The FIELDS instrument onboard Parker Solar Probe (PSP) observes dust impacts on the spacecraft. The derived dust flux rates suggest that the particles originate from the vicinities of the Sun and are ejected by radiation pressure. Radiation pressure typically ejects particles of several 100 nm and smaller, which are also affected by the e…
Solar Orbiter observations of the Kelvin-Helmholtz waves in the solar wind
Fedorov, A.; Lavraud, B.; Génot, V. +17 more
Context. The Kelvin-HeImholtz (KH) instability is a nonlinear shear-driven instability that develops at the interface between shear flows in plasmas. KH waves have been inferred in various astrophysical plasmas, and have been observed in situ at the magnetospheric boundaries of solar-system planets and through remote sensing at the boundaries of c…
High-resolution LAsMA 12CO and 13CO observation of the G305 giant molecular cloud complex. I. Feedback on the molecular gas
Menten, K. M.; Wyrowski, F.; Thompson, M. A. +3 more
Context. Understanding the effect of feedback, interaction of young massive stars with their parental giant molecular clouds, is of central importance for studies of the interstellar medium and star formation.
Aims: We observed the G305 star-forming complex in the J = 3-2 lines of 12CO and 13CO to investigate how molecul…
Isotopes of chlorine from HCl in the Martian atmosphere
Montmessin, F.; Korablev, O.; Fedorova, A. A. +7 more
Hydrogen chloride gas was recently discovered in the atmosphere of Mars during southern summer seasons. Its connection with potential chlorine reservoirs and the related atmospheric chemistry is now of particular interest and actively studied. Measurements by the Atmospheric Chemistry Suite mid-infrared channel (ACS MIR) on the ExoMars Trace Gas O…
Evidence of the Gaia-VLBI position differences being related to radio source structure
Xu, Ming H.; Savolainen, Tuomas; Anderson, James M. +3 more
Context. We report the relationship between the Gaia-VLBI position differences and the magnitudes of source structure effects in VLBI observations.
Aims: Because the Gaia-VLBI position differences are statistically significant for a considerable number of common sources, we discuss and attempt to explain these position differences based on VL…