Search Publications
A spectacular jet from the bright 244-440 Orion proplyd: The MUSE NFM view
Robberto, M.; Facchini, S.; Manara, C. F. +8 more
In this work we present the highest spatial and spectral resolution integral field observations to date of the bipolar jet from the Orion proplyd 244-440 using Multi-Unit Spectroscopic Explorer (MUSE) narrow-field mode (NFM) observations on the Very Large Telescope (VLT). We observed a previously unreported chain of six distinct knots in a roughly…
Image enhancement with wavelet-optimized whitening
Auchère, F.; Buchlin, É.; Soubrié, E. +1 more
Context. Due to its physical nature, the solar corona exhibits large spatial variations of intensity that make it difficult to simultaneously visualize the features present at all levels and scales. Many general-purpose and specialized filters have been proposed to enhance coronal images. However, most of them require the ad hoc tweaking of parame…
Revisiting empirical solar energetic particle scaling relations. I. Solar flares
Veronig, Astrid M.; Papaioannou, Athanasios; Herbst, Konstantin +3 more
Aims: The possible influence of solar superflares on the near-Earth space radiation environment are assessed through the investigation of scaling laws between the peak proton flux and fluence of solar energetic particle (SEP) events with the solar flare soft X-ray peak photon flux.
Methods: We compiled a catalog of 65 well-connected (W20…
Characterization and dynamics of the peculiar stream Jhelum. A tentative role for the Sagittarius dwarf galaxy
Helmi, Amina; Woudenberg, Hanneke C.; Balbinot, Eduardo +1 more
Context. Stellar streams are a promising tool to study the Milky Way's dark matter subhalo population, as interactions with subhalos are expected to leave visible imprints in the streams in the form of substructure. However, there may be other causes of substructure.
Aims: Here we studied the kinematics and the unusual morphology of the stell…
Exploring the low-mass regime of galaxy-scale strong lensing: Insights into the mass structure of cluster galaxies
Grillo, C.; Rosati, P.; Vanzella, E. +8 more
Context. Several recent studies have highlighted a discrepancy between the strong lensing (SL) properties of observed cluster galaxies and the predictions of Λ cold dark matter (CDM) cosmological hydrodynamical simulations. This discrepancy can be interpreted as the result of observed cluster members being more compact than their simulated counter…
A CO funnel in the Galactic centre: Molecular counterpart of the northern Galactic chimney
Menten, K. M.; Schilke, P.; Fuller, G. A. +7 more
We report the discovery of a velocity coherent, funnel-shaped 13CO emission feature in the Galactic centre (GC) using data from the SEDIGISM survey. The molecular cloud appears as a low-velocity structure (VLSR = [ − 3.5, + 3.5] km s−1) with an angular extent of 0.95° ×1°, extending towards positive Galactic latitu…
Estimating the number of planets that PLATO can detect
Rauer, H.; Cabrera, J.; Börner, A. +2 more
Context. The PLATO mission is scheduled for launch in 2026. It will monitor more than 245 000 FGK stars of magnitude 13 or brighter for planet transit events. Among the key scientific goals are the detection of Earth-Sun analogs; the detailed characterization of stars and planets in terms of mass, radius, and ages; the detection of planetary syste…
Physical and chemical complexity in high-mass star-forming regions with ALMA. I. Overview and evolutionary trends of physical properties
Henning, Th.; Beuther, H.; Ahmadi, A. +3 more
Context. High-mass star formation is a hierarchical process from cloud (>1 pc), to clump (0.1−1 pc), to core scales (<0.1 pc). Modern interferometers that achieve high angular resolutions at millimeter wavelengths allow us to probe the physical and chemical properties of the gas and dust of protostellar cores in the earliest evolutionary for…
The CORALIE survey for southern extrasolar planets. XIX. Brown dwarfs and stellar companions unveiled by radial velocity and astrometry
Bouchy, F.; Queloz, D.; Ségransan, D. +17 more
Context. A historical search for exoplanets among a sample of 1647 nearby southern main sequence stars with the CORALIE spectrograph at La Silla Observatory has been underway since 1998, with a backup subprogram dedicated to the monitoring of binary stars.
Aims: We reviewed 25 years of CORALIE measurements and search for Doppler signals consi…
Gaia-ESO survey: Massive stars in the Carina Nebula. I. A new census of OB stars
Gosset, E.; Herrero, A.; Comerón, F. +16 more
Context. The Carina Nebula is one of the major massive star-forming regions in the Galaxy. Its relatively nearby distance (2.35 kpc) makes it an ideal laboratory for the study of massive star formation, structure, and evolution, both for individual stars and stellar systems. Thanks to the high-quality spectra provided by the Gaia-ESO survey and th…