Search Publications
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…
Physical characterization of recently discovered globular clusters in the Sagittarius dwarf spheroidal galaxy. I. Metallicities, ages, and luminosities
Minniti, D.; Alonso-García, J.; Gómez, M. +1 more
Context. Globular clusters (GCs) are important tools for rebuilding the accretion history of a galaxy. In particular, newly discovered GCs in the Sagittarius (Sgr) dwarf galaxy can be used as probes of the accretion event onto the Milky Way (MW).
Aims: Our main aim is to characterize the GC system of the Sgr dwarf galaxy by measuring its main…
Structure and dynamics of the inner nebula around the symbiotic stellar system R Aquarii
Alcolea, J.; Santander-García, M.; Bujarrabal, V. +5 more
Aims: We investigate the structure, dynamics, and chemistry of the molecule-rich nebula around the stellar symbiotic system R Aqr, which is significantly affected by the presence of a white dwarf (WD) companion. We study the effects of the strong dynamical interaction between the AGB wind and the WD and of photodissociation by the WD UV radia…
Formation of an ultra-diffuse galaxy in the stellar filaments of NGC 3314A: Caught in the act?
Rampazzo, Roberto; Forbes, Duncan A.; Mieske, Steffen +13 more
The VEGAS imaging survey of the Hydra I cluster has revealed an extended network of stellar filaments to the south-west of the spiral galaxy NGC 3314A. Within these filaments, at a projected distance of ∼40 kpc from the galaxy, we discover an ultra-diffuse galaxy (UDG) with a central surface brightness of µ0, g ∼ 26 mag arcsec
A near-infrared interferometric survey of debris-disk stars. VII. The hot-to-warm dust connection
Absil, O.; Augereau, J. -C.; Ertel, S. +10 more
Context. Hot exozodiacal dust has been shown to be present in the innermost regions of an increasing number of main sequence stars over the past 15 yr. However, the origin of hot exozodiacal dust and its connection with outer dust reservoirs remains unclear.
Aims: We aim to explore the possible connection between hot exozodiacal dust and warm…
Connecting solar flare hard X-ray spectra to in situ electron spectra. A comparison of RHESSI and STEREO/SEPT observations
Klein, K. -L.; Dresing, N.; Warmuth, A. +4 more
Aims: We aim to constrain the acceleration, injection, and transport processes of flare-accelerated energetic electrons by comparing their characteristics at the Sun with those injected into interplanetary space.
Methods: We have identified 17 energetic electron events well-observed with the SEPT instrument aboard STEREO which show a cle…