Search Publications
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…
Photo-chemo-dynamical analysis and the origin of the bulge globular cluster Palomar 6
Valentini, M.; Anders, F.; Chiappini, C. +7 more
Context. Palomar 6 (Pal6) is a moderately metal-poor globular cluster projected towards the Galactic bulge. A full analysis of the cluster can give hints on the early chemical enrichment of the Galaxy and a plausible origin of the cluster.
Aims: The aim of this study is threefold: a detailed analysis of high-resolution spectroscopic data obta…
Multi-tracer analysis of straight depolarisation canals in the surroundings of the 3C 196 field
Haverkorn, Marijke; Turić, Luka; Jelić, Vibor +6 more
Context. Faraday tomography of a field centred on the extragalactic point source 3C 196 with the LOw Frequency ARray (LOFAR) revealed an intertwined structure of diffuse polarised emission with straight depolarisation canals and tracers of the magnetised and multi-phase interstellar medium (ISM), such as dust and line emission from atomic hydrogen…
First-year ion-acoustic wave observations in the solar wind by the RPW/TDS instrument on board Solar Orbiter
Maksimovic, M.; Bale, S. D.; Chust, T. +21 more
Context. Electric field measurements of the Time Domain Sampler (TDS) receiver, part of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter, often exhibit very intense broadband wave emissions at frequencies below 20 kHz in the spacecraft frame. During the first year of the mission, the RPW/TDS instrument was operating from the firs…
The most luminous blue quasars at 3.0 < z < 3.3. II. C IV/X-ray emission and accretion disc physics
Marconi, A.; Vignali, C.; Gilli, R. +12 more
We analyse the properties of the high-ionisation C IVλ1549 broad emission line in connection with the X-ray emission of 30 bright, optically selected quasars at z ≃ 3.0−3.3 with pointed XMM-Newton observations, which were selected to test the suitability of active galactic nuclei as cosmological tools. In our previous work, we found that a large f…
A MUSE spectro-imaging study of the Th 28 jet: Precession in the inner jet
Ray, T. P.; Eislöffel, J.; Bacciotti, F. +5 more
Context. Th 28 is a Classical T Tauri star in the Lupus 3 cloud that drives an extended bipolar jet. Previous studies of the inner jet identified signatures of rotation around the outflow axis, a key result for theories of jet launching. Thus this is an important source in which to investigate the poorly understood jet launching mechanism.
Ai…